Water Quality in GREENWICH, CT (06830)
EPA violation data for public water systems serving ZIP code 06830.
32
Total Violations
4
Health-Based
28
Monitoring / Reporting
30
Resolved
What does this mean?
30 of 32 violations have been resolved. 4 are health-based violations, meaning contaminant levels exceeded federal safety limits. The remaining 28 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 (32 total)
| Contaminant | Category | MCL Limit | Measured | Date | Status | Health Effects |
|---|---|---|---|---|---|---|
| E. COLI | Monitoring | 0 | N/A | Jun 30, 2025 | Resolved | Severe gastrointestinal illness; may be fatal in vulnerable populations |
| Lead and Copper Rule | Monitoring | N/A | N/A | Dec 29, 2024 | Resolved | N/A |
| Lead and Copper Rule | Monitoring | N/A | N/A | Dec 29, 2024 | Resolved | N/A |
| LEAD AND COPPER RULE REVISIONS | Monitoring | N/A | N/A | Oct 16, 2024 | Active | N/A |
| LEAD AND COPPER RULE REVISIONS | Health-Based | N/A | N/A | Oct 16, 2024 | Active | N/A |
| Lead and Copper Rule | Monitoring | N/A | N/A | Sep 28, 2024 | Resolved | N/A |
| Lead and Copper Rule | Health-Based | N/A | N/A | Jun 30, 2024 | Resolved | N/A |
| Lead and Copper Rule | Health-Based | N/A | N/A | Jun 30, 2024 | Resolved | N/A |
| Lead and Copper Rule | Health-Based | N/A | N/A | Jun 30, 2024 | Resolved | N/A |
| E. COLI | Monitoring | 0 | N/A | Mar 31, 2024 | Resolved | Severe gastrointestinal illness; may be fatal in vulnerable populations |
Lead & Copper Levels
Violation Timeline
2025(1)
E. COLI
19
2024(14)
Lead and Copper Rule
66
Lead and Copper Rule
66
LEAD AND COPPER RULE REVISIONS
4G
LEAD AND COPPER RULE REVISIONS
2E
Lead and Copper Rule
66
Lead and Copper Rule
59
Lead and Copper Rule
59
Lead and Copper Rule
59
E. COLI
19
E. COLI
19
E. COLI
19
E. COLI
19
Lead and Copper Rule
66
Lead and Copper Rule
66
How Does This Compare?
GREENWICH (06830) has 32 recorded violations, including 4 health-based. 2 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.