Water Quality in CASTLE ROCK, CO (80104)
EPA violation data for public water systems serving ZIP code 80104.
230
Total Violations
113
Health-Based
117
Monitoring / Reporting
226
Resolved
What does this mean?
226 of 230 violations have been resolved. 113 are health-based violations, meaning contaminant levels exceeded federal safety limits. The remaining 117 are monitoring or reporting violations (missed testing deadlines or late paperwork — not necessarily a water quality issue). Not all violations mean your water is unsafe. The EPA requires reporting even for minor administrative issues.
Violations Detail (230 total)
| Contaminant | Category | MCL Limit | Measured | Date | Status | Health Effects |
|---|---|---|---|---|---|---|
| Lead and Copper Rule | Monitoring | N/A | N/A | Sep 30, 2025 | Active | N/A |
| Lead and Copper Rule | Monitoring | N/A | N/A | Sep 30, 2025 | Active | N/A |
| E. COLI | Monitoring | 0 | N/A | Jul 19, 2025 | Resolved | Severe gastrointestinal illness; may be fatal in vulnerable populations |
| E. COLI | Monitoring | 0 | N/A | Jul 19, 2025 | Resolved | Severe gastrointestinal illness; may be fatal in vulnerable populations |
| E. COLI | Monitoring | 0 | N/A | Jul 19, 2025 | Resolved | Severe gastrointestinal illness; may be fatal in vulnerable populations |
| Lead and Copper Rule | Monitoring | N/A | N/A | Mar 31, 2025 | Resolved | N/A |
| Lead and Copper Rule | Monitoring | N/A | N/A | Mar 31, 2025 | Resolved | N/A |
| Lead and Copper Rule | Monitoring | N/A | N/A | Mar 31, 2025 | Resolved | N/A |
| Combined Radium (-226 and -228) | Health-Based | N/A | 6 | Sep 30, 2024 | Resolved | N/A |
| Combined Radium (-226 and -228) | Health-Based | N/A | 6 | Sep 30, 2024 | Resolved | N/A |
| Combined Radium (-226 and -228) | Health-Based | N/A | 6 | Sep 30, 2024 | Resolved | N/A |
| Combined Radium (-226 and -228) | Health-Based | N/A | 6 | Sep 30, 2024 | Resolved | N/A |
| Combined Radium (-226 and -228) | Health-Based | N/A | 6 | Sep 30, 2024 | Resolved | N/A |
| Combined Radium (-226 and -228) | Health-Based | N/A | 6 | Jun 30, 2024 | Resolved | N/A |
| Combined Radium (-226 and -228) | Health-Based | N/A | 6 | Jun 30, 2024 | Resolved | N/A |
| Combined Radium (-226 and -228) | Health-Based | N/A | 6 | Jun 30, 2024 | Resolved | N/A |
| Combined Radium (-226 and -228) | Health-Based | N/A | 6 | Jun 30, 2024 | Resolved | N/A |
| Combined Radium (-226 and -228) | Health-Based | N/A | 6 | Jun 30, 2024 | Resolved | N/A |
| Consumer Confidence Rule | Monitoring | N/A | N/A | Jun 30, 2024 | Resolved | N/A |
| Revised Total Coliform Rule | Monitoring | N/A | N/A | Jun 30, 2024 | Resolved | N/A |
| Revised Total Coliform Rule | Monitoring | N/A | N/A | Jun 30, 2024 | Resolved | N/A |
| Revised Total Coliform Rule | Monitoring | N/A | N/A | Jun 30, 2024 | Resolved | N/A |
| Revised Total Coliform Rule | Monitoring | N/A | N/A | Jun 30, 2024 | Resolved | N/A |
| Public Notice | Monitoring | N/A | N/A | May 9, 2024 | Resolved | N/A |
| Public Notice | Monitoring | N/A | N/A | May 9, 2024 | Resolved | N/A |
| Public Notice | Monitoring | N/A | N/A | Apr 14, 2024 | Resolved | N/A |
| Combined Radium (-226 and -228) | Health-Based | N/A | 7 | Mar 31, 2024 | Resolved | N/A |
| Combined Radium (-226 and -228) | Health-Based | N/A | 7 | Mar 31, 2024 | Resolved | N/A |
| Combined Radium (-226 and -228) | Health-Based | N/A | 7 | Mar 31, 2024 | Resolved | N/A |
| Combined Radium (-226 and -228) | Health-Based | N/A | 7 | Mar 31, 2024 | Resolved | N/A |
| Combined Radium (-226 and -228) | Health-Based | N/A | 7 | Mar 31, 2024 | Resolved | N/A |
| Public Notice | Monitoring | N/A | N/A | Feb 3, 2024 | Resolved | N/A |
| Public Notice | Monitoring | N/A | N/A | Feb 3, 2024 | Resolved | N/A |
| Combined Radium (-226 and -228) | Health-Based | N/A | 7.22 | Dec 31, 2023 | Resolved | N/A |
| Combined Radium (-226 and -228) | Health-Based | N/A | 7.22 | Dec 31, 2023 | Resolved | N/A |
| Combined Radium (-226 and -228) | Health-Based | N/A | 7.22 | Dec 31, 2023 | Resolved | N/A |
| Combined Radium (-226 and -228) | Health-Based | N/A | 7.22 | Dec 31, 2023 | Resolved | N/A |
| Combined Radium (-226 and -228) | Health-Based | N/A | 7.22 | Dec 31, 2023 | Resolved | N/A |
| Lead and Copper Rule | Monitoring | N/A | N/A | Dec 29, 2023 | Resolved | N/A |
| Public Notice | Monitoring | N/A | N/A | Dec 13, 2023 | Resolved | N/A |
| Public Notice | Monitoring | N/A | N/A | Oct 5, 2023 | Active | N/A |
| Combined Radium (-226 and -228) | Health-Based | N/A | 7.05 | Sep 30, 2023 | Resolved | N/A |
| Combined Radium (-226 and -228) | Health-Based | N/A | 7.05 | Sep 30, 2023 | Resolved | N/A |
| Combined Radium (-226 and -228) | Health-Based | N/A | 7.05 | Sep 30, 2023 | Resolved | N/A |
| Combined Radium (-226 and -228) | Health-Based | N/A | 7.05 | Sep 30, 2023 | Resolved | N/A |
| Combined Radium (-226 and -228) | Health-Based | N/A | 7.05 | Sep 30, 2023 | Resolved | N/A |
| Public Notice | Monitoring | N/A | N/A | Aug 1, 2023 | Resolved | N/A |
| Public Notice | Monitoring | N/A | N/A | Jul 5, 2023 | Active | N/A |
| Combined Radium (-226 and -228) | Monitoring | N/A | N/A | Jun 30, 2023 | Resolved | N/A |
| Combined Radium (-226 and -228) | Health-Based | N/A | 6.27 | Jun 30, 2023 | Resolved | N/A |
| Combined Radium (-226 and -228) | Monitoring | N/A | N/A | Jun 30, 2023 | Resolved | N/A |
| Combined Radium (-226 and -228) | Monitoring | N/A | N/A | Jun 30, 2023 | Resolved | N/A |
| Combined Radium (-226 and -228) | Monitoring | N/A | N/A | Jun 30, 2023 | Resolved | N/A |
| Combined Radium (-226 and -228) | Health-Based | N/A | 6.27 | Jun 30, 2023 | Resolved | N/A |
| Combined Radium (-226 and -228) | Health-Based | N/A | 6.27 | Jun 30, 2023 | Resolved | N/A |
| Combined Radium (-226 and -228) | Health-Based | N/A | 6.27 | Jun 30, 2023 | Resolved | N/A |
| Combined Radium (-226 and -228) | Health-Based | N/A | 6.27 | Jun 30, 2023 | Resolved | N/A |
| Consumer Confidence Rule | Monitoring | N/A | N/A | Jun 30, 2023 | Resolved | N/A |
| Public Notice | Monitoring | N/A | N/A | May 31, 2023 | Resolved | N/A |
| Combined Radium (-226 and -228) | Health-Based | N/A | 6 | Mar 31, 2023 | Resolved | N/A |
| Combined Radium (-226 and -228) | Health-Based | N/A | 6 | Mar 31, 2023 | Resolved | N/A |
| Combined Radium (-226 and -228) | Health-Based | N/A | 6 | Mar 31, 2023 | Resolved | N/A |
| Combined Radium (-226 and -228) | Health-Based | N/A | 6 | Mar 31, 2023 | Resolved | N/A |
| Combined Radium (-226 and -228) | Health-Based | N/A | 6 | Mar 31, 2023 | Resolved | N/A |
| Lead and Copper Rule | Monitoring | N/A | N/A | Mar 31, 2023 | Resolved | N/A |
| Lead and Copper Rule | Monitoring | N/A | N/A | Mar 31, 2023 | Resolved | N/A |
| Lead and Copper Rule | Monitoring | N/A | N/A | Mar 31, 2023 | Resolved | N/A |
| Lead and Copper Rule | Monitoring | N/A | N/A | Mar 31, 2023 | Resolved | N/A |
| Nitrate | Health-Based | N/A | 11.24 | Mar 31, 2023 | Resolved | Infants below the age of six months could become seriously ill (blue baby syndrome); shortness of breath |
| Nitrate | Health-Based | N/A | 11.24 | Mar 31, 2023 | Resolved | Infants below the age of six months could become seriously ill (blue baby syndrome); shortness of breath |
| Nitrate | Health-Based | N/A | 11.24 | Mar 31, 2023 | Resolved | Infants below the age of six months could become seriously ill (blue baby syndrome); shortness of breath |
| Nitrate | Health-Based | N/A | 11.24 | Mar 31, 2023 | Resolved | Infants below the age of six months could become seriously ill (blue baby syndrome); shortness of breath |
| Nitrate | Health-Based | N/A | 22.7 | Jan 31, 2023 | Resolved | Infants below the age of six months could become seriously ill (blue baby syndrome); shortness of breath |
| Nitrate | Health-Based | N/A | 22.7 | Jan 31, 2023 | Resolved | Infants below the age of six months could become seriously ill (blue baby syndrome); shortness of breath |
| Nitrate | Health-Based | N/A | 22.7 | Jan 31, 2023 | Resolved | Infants below the age of six months could become seriously ill (blue baby syndrome); shortness of breath |
| Nitrate | Health-Based | N/A | 22.7 | Jan 31, 2023 | Resolved | Infants below the age of six months could become seriously ill (blue baby syndrome); shortness of breath |
| Public Notice | Monitoring | N/A | N/A | Jan 5, 2023 | Resolved | N/A |
| Public Notice | Monitoring | N/A | N/A | Jan 5, 2023 | Resolved | N/A |
| Lead and Copper Rule | Monitoring | N/A | N/A | Dec 31, 2022 | Resolved | N/A |
| Combined Radium (-226 and -228) | Health-Based | N/A | 6 | Dec 31, 2022 | Resolved | N/A |
| Lead and Copper Rule | Monitoring | N/A | N/A | Dec 31, 2022 | Resolved | N/A |
| Lead and Copper Rule | Monitoring | N/A | N/A | Dec 31, 2022 | Resolved | N/A |
| Lead and Copper Rule | Monitoring | N/A | N/A | Dec 31, 2022 | Resolved | N/A |
| Combined Radium (-226 and -228) | Health-Based | N/A | 6 | Dec 31, 2022 | Resolved | N/A |
| Combined Radium (-226 and -228) | Health-Based | N/A | 6 | Dec 31, 2022 | Resolved | N/A |
| Combined Radium (-226 and -228) | Health-Based | N/A | 6 | Dec 31, 2022 | Resolved | N/A |
| Combined Radium (-226 and -228) | Health-Based | N/A | 6 | Dec 31, 2022 | Resolved | N/A |
| Combined Radium (-226 and -228) | Health-Based | N/A | 6 | Dec 31, 2022 | Resolved | N/A |
| Combined Radium (-226 and -228) | Health-Based | N/A | 6 | Dec 31, 2022 | Resolved | N/A |
| Nitrate | Health-Based | N/A | 23.6 | Dec 31, 2022 | Resolved | Infants below the age of six months could become seriously ill (blue baby syndrome); shortness of breath |
| Nitrate | Health-Based | N/A | 23.6 | Dec 31, 2022 | Resolved | Infants below the age of six months could become seriously ill (blue baby syndrome); shortness of breath |
| Nitrate | Health-Based | N/A | 23.6 | Dec 31, 2022 | Resolved | Infants below the age of six months could become seriously ill (blue baby syndrome); shortness of breath |
| Nitrate | Health-Based | N/A | 23.6 | Dec 31, 2022 | Resolved | Infants below the age of six months could become seriously ill (blue baby syndrome); shortness of breath |
| Lead and Copper Rule | Monitoring | N/A | N/A | Oct 31, 2022 | Resolved | N/A |
| Lead and Copper Rule | Monitoring | N/A | N/A | Oct 31, 2022 | Resolved | N/A |
| Lead and Copper Rule | Monitoring | N/A | N/A | Oct 31, 2022 | Resolved | N/A |
| Lead and Copper Rule | Monitoring | N/A | N/A | Oct 31, 2022 | Resolved | N/A |
| Nitrate | Monitoring | N/A | N/A | Sep 30, 2022 | Resolved | Infants below the age of six months could become seriously ill (blue baby syndrome); shortness of breath |
| Nitrate | Monitoring | N/A | N/A | Sep 30, 2022 | Resolved | Infants below the age of six months could become seriously ill (blue baby syndrome); shortness of breath |
| Nitrate | Monitoring | N/A | N/A | Sep 30, 2022 | Resolved | Infants below the age of six months could become seriously ill (blue baby syndrome); shortness of breath |
| Combined Radium (-226 and -228) | Health-Based | N/A | 6.2 | Sep 30, 2022 | Resolved | N/A |
| Combined Radium (-226 and -228) | Health-Based | N/A | 6.2 | Sep 30, 2022 | Resolved | N/A |
| Combined Radium (-226 and -228) | Health-Based | N/A | 6.2 | Sep 30, 2022 | Resolved | N/A |
| Combined Radium (-226 and -228) | Health-Based | N/A | 6.2 | Sep 30, 2022 | Resolved | N/A |
| Combined Radium (-226 and -228) | Health-Based | N/A | 6.2 | Sep 30, 2022 | Resolved | N/A |
| Combined Radium (-226 and -228) | Health-Based | N/A | 6.2 | Sep 30, 2022 | Resolved | N/A |
| Combined Radium (-226 and -228) | Health-Based | N/A | 6.2 | Sep 30, 2022 | Resolved | N/A |
| E. COLI | Monitoring | 0 | N/A | Jul 31, 2022 | Resolved | Severe gastrointestinal illness; may be fatal in vulnerable populations |
| E. COLI | Monitoring | 0 | N/A | Jul 31, 2022 | Resolved | Severe gastrointestinal illness; may be fatal in vulnerable populations |
| E. COLI | Monitoring | 0 | N/A | Jul 31, 2022 | Resolved | Severe gastrointestinal illness; may be fatal in vulnerable populations |
| Lead and Copper Rule | Monitoring | N/A | N/A | Jun 30, 2022 | Resolved | N/A |
| Lead and Copper Rule | Monitoring | N/A | N/A | Jun 30, 2022 | Resolved | N/A |
| Combined Radium (-226 and -228) | Health-Based | N/A | 6.4 | Jun 30, 2022 | Resolved | N/A |
| Combined Radium (-226 and -228) | Health-Based | N/A | 6.4 | Jun 30, 2022 | Resolved | N/A |
| Combined Radium (-226 and -228) | Health-Based | N/A | 6.4 | Jun 30, 2022 | Resolved | N/A |
| Consumer Confidence Rule | Monitoring | N/A | N/A | Jun 30, 2022 | Resolved | N/A |
| Lead and Copper Rule | Monitoring | N/A | N/A | Jun 30, 2022 | Resolved | N/A |
| Lead and Copper Rule | Monitoring | N/A | N/A | Jun 30, 2022 | Resolved | N/A |
| Combined Radium (-226 and -228) | Health-Based | N/A | 6.4 | Jun 30, 2022 | Resolved | N/A |
| Combined Radium (-226 and -228) | Health-Based | N/A | 6.4 | Jun 30, 2022 | Resolved | N/A |
| Lead and Copper Rule | Monitoring | N/A | N/A | Jun 30, 2022 | Resolved | N/A |
| Consumer Confidence Rule | Monitoring | N/A | N/A | Jun 30, 2022 | Resolved | N/A |
| Consumer Confidence Rule | Monitoring | N/A | N/A | Jun 30, 2022 | Resolved | N/A |
| Combined Radium (-226 and -228) | Health-Based | N/A | 6.4 | Jun 30, 2022 | Resolved | N/A |
| Combined Radium (-226 and -228) | Health-Based | N/A | 6.4 | Jun 30, 2022 | Resolved | N/A |
| Consumer Confidence Rule | Monitoring | N/A | N/A | Jun 30, 2022 | Resolved | N/A |
| Public Notice | Monitoring | N/A | N/A | Jun 5, 2022 | Resolved | N/A |
| Public Notice | Monitoring | N/A | N/A | Jun 5, 2022 | Resolved | N/A |
| E. COLI | Monitoring | 0 | N/A | May 31, 2022 | Resolved | Severe gastrointestinal illness; may be fatal in vulnerable populations |
| E. COLI | Monitoring | 0 | N/A | May 31, 2022 | Resolved | Severe gastrointestinal illness; may be fatal in vulnerable populations |
| E. COLI | Monitoring | 0 | N/A | May 31, 2022 | Resolved | Severe gastrointestinal illness; may be fatal in vulnerable populations |
| Revised Total Coliform Rule | Monitoring | N/A | N/A | May 31, 2022 | Resolved | N/A |
| Revised Total Coliform Rule | Monitoring | N/A | N/A | May 31, 2022 | Resolved | N/A |
| Revised Total Coliform Rule | Monitoring | N/A | N/A | May 31, 2022 | Resolved | N/A |
| Revised Total Coliform Rule | Monitoring | N/A | N/A | May 31, 2022 | Resolved | N/A |
| Public Notice | Monitoring | N/A | N/A | May 5, 2022 | Resolved | N/A |
| Public Notice | Monitoring | N/A | N/A | May 5, 2022 | Resolved | N/A |
| Combined Radium (-226 and -228) | Health-Based | N/A | 7.33 | Mar 31, 2022 | Resolved | N/A |
| Combined Radium (-226 and -228) | Health-Based | N/A | 7.33 | Mar 31, 2022 | Resolved | N/A |
| Combined Radium (-226 and -228) | Health-Based | N/A | 7.33 | Mar 31, 2022 | Resolved | N/A |
| Combined Radium (-226 and -228) | Health-Based | N/A | 7.33 | Mar 31, 2022 | Resolved | N/A |
| Combined Radium (-226 and -228) | Health-Based | N/A | 7.33 | Mar 31, 2022 | Resolved | N/A |
| Combined Radium (-226 and -228) | Health-Based | N/A | 7.33 | Mar 31, 2022 | Resolved | N/A |
| Combined Radium (-226 and -228) | Health-Based | N/A | 7.33 | Mar 31, 2022 | Resolved | N/A |
| Revised Total Coliform Rule | Monitoring | N/A | N/A | Mar 31, 2022 | Resolved | N/A |
| Revised Total Coliform Rule | Monitoring | N/A | N/A | Mar 31, 2022 | Resolved | N/A |
| Revised Total Coliform Rule | Monitoring | N/A | N/A | Mar 31, 2022 | Resolved | N/A |
| Revised Total Coliform Rule | Monitoring | N/A | N/A | Mar 31, 2022 | Resolved | N/A |
| Public Notice | Monitoring | N/A | N/A | Mar 12, 2022 | Resolved | N/A |
| Public Notice | Monitoring | N/A | N/A | Mar 12, 2022 | Resolved | N/A |
| E. COLI | Monitoring | 0 | N/A | Feb 28, 2022 | Resolved | Severe gastrointestinal illness; may be fatal in vulnerable populations |
| E. COLI | Monitoring | 0 | N/A | Feb 28, 2022 | Resolved | Severe gastrointestinal illness; may be fatal in vulnerable populations |
| Public Notice | Monitoring | N/A | N/A | Feb 5, 2022 | Resolved | N/A |
| Public Notice | Monitoring | N/A | N/A | Feb 5, 2022 | Resolved | N/A |
| Combined Radium (-226 and -228) | Monitoring | N/A | N/A | Dec 31, 2021 | Resolved | N/A |
| Combined Radium (-226 and -228) | Monitoring | N/A | N/A | Dec 31, 2021 | Resolved | N/A |
| Combined Radium (-226 and -228) | Monitoring | N/A | N/A | Dec 31, 2021 | Resolved | N/A |
| Nitrate | Monitoring | N/A | N/A | Dec 31, 2021 | Resolved | Infants below the age of six months could become seriously ill (blue baby syndrome); shortness of breath |
| Nitrate | Monitoring | N/A | N/A | Dec 31, 2021 | Resolved | Infants below the age of six months could become seriously ill (blue baby syndrome); shortness of breath |
| Nitrate | Monitoring | N/A | N/A | Dec 31, 2021 | Resolved | Infants below the age of six months could become seriously ill (blue baby syndrome); shortness of breath |
| Combined Radium (-226 and -228) | Health-Based | N/A | 7.98 | Dec 31, 2021 | Resolved | N/A |
| Combined Radium (-226 and -228) | Health-Based | N/A | 7.98 | Dec 31, 2021 | Resolved | N/A |
| Combined Radium (-226 and -228) | Health-Based | N/A | 7.98 | Dec 31, 2021 | Resolved | N/A |
| Combined Radium (-226 and -228) | Health-Based | N/A | 7.98 | Dec 31, 2021 | Resolved | N/A |
| Combined Radium (-226 and -228) | Health-Based | N/A | 7.98 | Dec 31, 2021 | Resolved | N/A |
| Combined Radium (-226 and -228) | Health-Based | N/A | 7.98 | Dec 31, 2021 | Resolved | N/A |
| Combined Radium (-226 and -228) | Health-Based | N/A | 7.98 | Dec 31, 2021 | Resolved | N/A |
| Nitrate-Nitrite | Monitoring | N/A | N/A | Dec 31, 2021 | Resolved | N/A |
| Nitrate-Nitrite | Monitoring | N/A | N/A | Dec 31, 2021 | Resolved | N/A |
| Nitrate-Nitrite | Monitoring | N/A | N/A | Dec 31, 2021 | Resolved | N/A |
| Nitrate-Nitrite | Monitoring | N/A | N/A | Dec 31, 2021 | Resolved | N/A |
| Public Notice | Monitoring | N/A | N/A | Dec 10, 2021 | Resolved | N/A |
| Public Notice | Monitoring | N/A | N/A | Dec 10, 2021 | Resolved | N/A |
| Public Notice | Monitoring | N/A | N/A | Dec 5, 2021 | Resolved | N/A |
| Public Notice | Monitoring | N/A | N/A | Dec 5, 2021 | Resolved | N/A |
| Chlorine | Monitoring | N/A | N/A | Sep 30, 2021 | Resolved | Eye and nose irritation; stomach discomfort |
| Chlorine | Monitoring | N/A | N/A | Sep 30, 2021 | Resolved | Eye and nose irritation; stomach discomfort |
| Chlorine | Monitoring | N/A | N/A | Sep 30, 2021 | Resolved | Eye and nose irritation; stomach discomfort |
| Combined Radium (-226 and -228) | Health-Based | N/A | 6 | Sep 30, 2021 | Resolved | N/A |
| Revised Total Coliform Rule | Monitoring | N/A | N/A | Sep 30, 2021 | Resolved | N/A |
| Revised Total Coliform Rule | Monitoring | N/A | N/A | Sep 30, 2021 | Resolved | N/A |
| Revised Total Coliform Rule | Monitoring | N/A | N/A | Sep 30, 2021 | Resolved | N/A |
| Combined Radium (-226 and -228) | Health-Based | N/A | 6 | Sep 30, 2021 | Resolved | N/A |
| Combined Radium (-226 and -228) | Health-Based | N/A | 6 | Sep 30, 2021 | Resolved | N/A |
| Combined Radium (-226 and -228) | Health-Based | N/A | 6 | Sep 30, 2021 | Resolved | N/A |
| Combined Radium (-226 and -228) | Health-Based | N/A | 7.53 | Sep 30, 2021 | Resolved | N/A |
| Lead and Copper Rule | Monitoring | N/A | N/A | Sep 30, 2021 | Resolved | N/A |
| Lead and Copper Rule | Monitoring | N/A | N/A | Sep 30, 2021 | Resolved | N/A |
| Lead and Copper Rule | Monitoring | N/A | N/A | Sep 30, 2021 | Resolved | N/A |
| Combined Radium (-226 and -228) | Health-Based | N/A | 7.53 | Sep 30, 2021 | Resolved | N/A |
| Combined Radium (-226 and -228) | Health-Based | N/A | 7.53 | Sep 30, 2021 | Resolved | N/A |
| Combined Radium (-226 and -228) | Health-Based | N/A | 7.53 | Sep 30, 2021 | Resolved | N/A |
| Combined Radium (-226 and -228) | Health-Based | N/A | 7.53 | Sep 30, 2021 | Resolved | N/A |
| Combined Radium (-226 and -228) | Health-Based | N/A | 7.53 | Sep 30, 2021 | Resolved | N/A |
| Combined Radium (-226 and -228) | Health-Based | N/A | 7.53 | Sep 30, 2021 | Resolved | N/A |
| Public Notice | Monitoring | N/A | N/A | Sep 5, 2021 | Resolved | N/A |
| Public Notice | Monitoring | N/A | N/A | Sep 5, 2021 | Resolved | N/A |
| Nitrate | Monitoring | N/A | N/A | Aug 31, 2021 | Resolved | Infants below the age of six months could become seriously ill (blue baby syndrome); shortness of breath |
| Nitrate | Monitoring | N/A | N/A | Aug 31, 2021 | Resolved | Infants below the age of six months could become seriously ill (blue baby syndrome); shortness of breath |
| Nitrate | Monitoring | N/A | N/A | Aug 31, 2021 | Resolved | Infants below the age of six months could become seriously ill (blue baby syndrome); shortness of breath |
| Combined Radium (-226 and -228) | Health-Based | N/A | 6.88 | Jun 30, 2021 | Resolved | N/A |
| Combined Radium (-226 and -228) | Health-Based | N/A | 6.88 | Jun 30, 2021 | Resolved | N/A |
| Combined Radium (-226 and -228) | Health-Based | N/A | 6.88 | Jun 30, 2021 | Resolved | N/A |
| Combined Radium (-226 and -228) | Health-Based | N/A | 6.88 | Jun 30, 2021 | Resolved | N/A |
| Combined Radium (-226 and -228) | Health-Based | N/A | 6.88 | Jun 30, 2021 | Resolved | N/A |
| Combined Radium (-226 and -228) | Health-Based | N/A | 6.88 | Jun 30, 2021 | Resolved | N/A |
| Combined Radium (-226 and -228) | Health-Based | N/A | 6.88 | Jun 30, 2021 | Resolved | N/A |
| Consumer Confidence Rule | Monitoring | N/A | N/A | Jun 30, 2021 | Resolved | N/A |
| Public Notice | Monitoring | N/A | N/A | Jun 2, 2021 | Resolved | N/A |
| Public Notice | Monitoring | N/A | N/A | Jun 2, 2021 | Resolved | N/A |
| Public Notice | Monitoring | N/A | N/A | Apr 2, 2021 | Resolved | N/A |
| Public Notice | Monitoring | N/A | N/A | Apr 2, 2021 | Resolved | N/A |
| Combined Radium (-226 and -228) | Health-Based | N/A | 5.1 | Mar 31, 2021 | Resolved | N/A |
| Lead and Copper Rule | Health-Based | N/A | N/A | Mar 31, 2021 | Resolved | N/A |
| Lead and Copper Rule | Health-Based | N/A | N/A | Mar 31, 2021 | Resolved | N/A |
| Lead and Copper Rule | Health-Based | N/A | N/A | Mar 31, 2021 | Resolved | N/A |
| Lead and Copper Rule | Health-Based | N/A | N/A | Mar 31, 2021 | Resolved | N/A |
| Lead and Copper Rule | Health-Based | N/A | N/A | Mar 31, 2021 | Resolved | N/A |
| Combined Radium (-226 and -228) | Health-Based | N/A | 5.1 | Mar 31, 2021 | Resolved | N/A |
| Combined Radium (-226 and -228) | Health-Based | N/A | 5.1 | Mar 31, 2021 | Resolved | N/A |
| Combined Radium (-226 and -228) | Health-Based | N/A | 5.1 | Mar 31, 2021 | Resolved | N/A |
| Combined Radium (-226 and -228) | Health-Based | N/A | 5.1 | Mar 31, 2021 | Resolved | N/A |
| Combined Radium (-226 and -228) | Health-Based | N/A | 5.1 | Mar 31, 2021 | Resolved | N/A |
| Combined Radium (-226 and -228) | Health-Based | N/A | 5.1 | Mar 31, 2021 | Resolved | N/A |
| Lead and Copper Rule | Health-Based | N/A | N/A | Mar 31, 2021 | Resolved | N/A |
| Revised Total Coliform Rule | Monitoring | N/A | N/A | Mar 31, 2021 | Resolved | N/A |
| Revised Total Coliform Rule | Monitoring | N/A | N/A | Mar 31, 2021 | Resolved | N/A |
| Revised Total Coliform Rule | Monitoring | N/A | N/A | Mar 31, 2021 | Resolved | N/A |
| Public Notice | Monitoring | N/A | N/A | Feb 20, 2021 | Resolved | N/A |
| Public Notice | Monitoring | N/A | N/A | Feb 20, 2021 | Resolved | N/A |
Lead & Copper Levels
Violation Timeline
2025(8)
Lead and Copper Rule
66
Lead and Copper Rule
66
E. COLI
34
E. COLI
34
E. COLI
34
Lead and Copper Rule
66
Lead and Copper Rule
66
Lead and Copper Rule
66
2024(25)
Combined Radium (-226 and -228)
02
Combined Radium (-226 and -228)
02
Combined Radium (-226 and -228)
02
Combined Radium (-226 and -228)
02
Combined Radium (-226 and -228)
02
Combined Radium (-226 and -228)
02
Combined Radium (-226 and -228)
02
Combined Radium (-226 and -228)
02
Combined Radium (-226 and -228)
02
Combined Radium (-226 and -228)
02
Consumer Confidence Rule
71
Revised Total Coliform Rule
3A
Revised Total Coliform Rule
3A
Revised Total Coliform Rule
3A
Revised Total Coliform Rule
3A
Public Notice
75
Public Notice
75
Public Notice
75
Combined Radium (-226 and -228)
02
Combined Radium (-226 and -228)
02
Combined Radium (-226 and -228)
02
Combined Radium (-226 and -228)
02
Combined Radium (-226 and -228)
02
Public Notice
75
Public Notice
75
2023(45)
Combined Radium (-226 and -228)
02
Combined Radium (-226 and -228)
02
Combined Radium (-226 and -228)
02
Combined Radium (-226 and -228)
02
Combined Radium (-226 and -228)
02
Lead and Copper Rule
66
Public Notice
75
Public Notice
76
Combined Radium (-226 and -228)
02
Combined Radium (-226 and -228)
02
Combined Radium (-226 and -228)
02
Combined Radium (-226 and -228)
02
Combined Radium (-226 and -228)
02
Public Notice
75
Public Notice
76
Combined Radium (-226 and -228)
03
Combined Radium (-226 and -228)
02
Combined Radium (-226 and -228)
03
Combined Radium (-226 and -228)
03
Combined Radium (-226 and -228)
03
Combined Radium (-226 and -228)
02
Combined Radium (-226 and -228)
02
Combined Radium (-226 and -228)
02
Combined Radium (-226 and -228)
02
Consumer Confidence Rule
71
Public Notice
75
Combined Radium (-226 and -228)
02
Combined Radium (-226 and -228)
02
Combined Radium (-226 and -228)
02
Combined Radium (-226 and -228)
02
Combined Radium (-226 and -228)
02
Lead and Copper Rule
66
Lead and Copper Rule
66
Lead and Copper Rule
66
Lead and Copper Rule
66
Nitrate
02
Nitrate
02
Nitrate
02
Nitrate
02
Nitrate
02
Nitrate
02
Nitrate
02
Nitrate
02
Public Notice
76
Public Notice
76
2022(76)
Lead and Copper Rule
56
Combined Radium (-226 and -228)
02
Lead and Copper Rule
56
Lead and Copper Rule
56
Lead and Copper Rule
56
Combined Radium (-226 and -228)
02
Combined Radium (-226 and -228)
02
Combined Radium (-226 and -228)
02
Combined Radium (-226 and -228)
02
Combined Radium (-226 and -228)
02
Combined Radium (-226 and -228)
02
Nitrate
02
Nitrate
02
Nitrate
02
Nitrate
02
Lead and Copper Rule
52
Lead and Copper Rule
52
Lead and Copper Rule
52
Lead and Copper Rule
52
Nitrate
03
Nitrate
03
Nitrate
03
Combined Radium (-226 and -228)
02
Combined Radium (-226 and -228)
02
Combined Radium (-226 and -228)
02
Combined Radium (-226 and -228)
02
Combined Radium (-226 and -228)
02
Combined Radium (-226 and -228)
02
Combined Radium (-226 and -228)
02
E. COLI
32
E. COLI
32
E. COLI
32
Lead and Copper Rule
53
Lead and Copper Rule
53
Combined Radium (-226 and -228)
02
Combined Radium (-226 and -228)
02
Combined Radium (-226 and -228)
02
Consumer Confidence Rule
71
Lead and Copper Rule
53
Lead and Copper Rule
53
Combined Radium (-226 and -228)
02
Combined Radium (-226 and -228)
02
Lead and Copper Rule
53
Consumer Confidence Rule
71
Consumer Confidence Rule
71
Combined Radium (-226 and -228)
02
Combined Radium (-226 and -228)
02
Consumer Confidence Rule
71
Public Notice
75
Public Notice
75
E. COLI
32
E. COLI
32
E. COLI
32
Revised Total Coliform Rule
3A
Revised Total Coliform Rule
3A
Revised Total Coliform Rule
3A
Revised Total Coliform Rule
3A
Public Notice
75
Public Notice
75
Combined Radium (-226 and -228)
02
Combined Radium (-226 and -228)
02
Combined Radium (-226 and -228)
02
Combined Radium (-226 and -228)
02
Combined Radium (-226 and -228)
02
Combined Radium (-226 and -228)
02
Combined Radium (-226 and -228)
02
Revised Total Coliform Rule
3A
Revised Total Coliform Rule
3A
Revised Total Coliform Rule
3A
Revised Total Coliform Rule
3A
Public Notice
75
Public Notice
75
E. COLI
32
E. COLI
32
Public Notice
75
Public Notice
75
2021(76)
Combined Radium (-226 and -228)
03
Combined Radium (-226 and -228)
03
Combined Radium (-226 and -228)
03
Nitrate
03
Nitrate
03
Nitrate
03
Combined Radium (-226 and -228)
02
Combined Radium (-226 and -228)
02
Combined Radium (-226 and -228)
02
Combined Radium (-226 and -228)
02
Combined Radium (-226 and -228)
02
Combined Radium (-226 and -228)
02
Combined Radium (-226 and -228)
02
Nitrate-Nitrite
03
Nitrate-Nitrite
03
Nitrate-Nitrite
03
Nitrate-Nitrite
03
Public Notice
75
Public Notice
75
Public Notice
75
Public Notice
75
Chlorine
27
Chlorine
27
Chlorine
27
Combined Radium (-226 and -228)
02
Revised Total Coliform Rule
3A
Revised Total Coliform Rule
3A
Revised Total Coliform Rule
3A
Combined Radium (-226 and -228)
02
Combined Radium (-226 and -228)
02
Combined Radium (-226 and -228)
02
Combined Radium (-226 and -228)
02
Lead and Copper Rule
66
Lead and Copper Rule
66
Lead and Copper Rule
66
Combined Radium (-226 and -228)
02
Combined Radium (-226 and -228)
02
Combined Radium (-226 and -228)
02
Combined Radium (-226 and -228)
02
Combined Radium (-226 and -228)
02
Combined Radium (-226 and -228)
02
Public Notice
75
Public Notice
75
Nitrate
03
Nitrate
03
Nitrate
03
Combined Radium (-226 and -228)
02
Combined Radium (-226 and -228)
02
Combined Radium (-226 and -228)
02
Combined Radium (-226 and -228)
02
Combined Radium (-226 and -228)
02
Combined Radium (-226 and -228)
02
Combined Radium (-226 and -228)
02
Consumer Confidence Rule
71
Public Notice
76
Public Notice
76
Public Notice
75
Public Notice
75
Combined Radium (-226 and -228)
02
Lead and Copper Rule
57
Lead and Copper Rule
57
Lead and Copper Rule
57
Lead and Copper Rule
57
Lead and Copper Rule
57
Combined Radium (-226 and -228)
02
Combined Radium (-226 and -228)
02
Combined Radium (-226 and -228)
02
Combined Radium (-226 and -228)
02
Combined Radium (-226 and -228)
02
Combined Radium (-226 and -228)
02
Lead and Copper Rule
57
Revised Total Coliform Rule
3A
Revised Total Coliform Rule
3A
Revised Total Coliform Rule
3A
Public Notice
76
Public Notice
76
How Does This Compare?
CASTLE ROCK (80104) has 230 recorded violations, including 113 health-based. 4 remain unresolved. Consider testing your tap water independently for added peace of mind.
Recommended Water Filters
Based on the contaminants detected in your area, these filter types may help improve your water quality.
Reverse Osmosis System
Highly effective at removing heavy metals, dissolved solids, and a wide range of contaminants. Recommended for homes with lead or arsenic concerns.
Targets:Lead, Copper, Arsenic, Mercury, Cadmium
Look for:NSF/ANSI 58 certified
UV Water Purifier
Uses ultraviolet light to neutralize bacteria, viruses, and parasites without chemicals. Ideal for homes with microbial contamination concerns.
Targets:E. coli, Coliform, Giardia, Cryptosporidium
Look for:NSF/ANSI 55 (Class A) certified
Always look for filters certified by NSF International for the specific contaminants you want to remove.