Water Quality in RAPID CITY, SD (57709)
EPA violation data for public water systems serving ZIP code 57709.
46
Total Violations
23
Health-Based
23
Monitoring / Reporting
46
Resolved
What does this mean?
46 of 46 violations have been resolved. 23 are health-based violations, meaning contaminant levels exceeded federal safety limits. The remaining 23 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 (46 total)
| Contaminant | Category | MCL Limit | Measured | Date | Status | Health Effects |
|---|---|---|---|---|---|---|
| Gross Alpha, Excl. Radon and U | Health-Based | N/A | 18 | Mar 31, 2025 | Resolved | N/A |
| Gross Alpha, Excl. Radon and U | Health-Based | N/A | 18 | Mar 31, 2025 | Resolved | N/A |
| Gross Alpha, Excl. Radon and U | Health-Based | N/A | 18 | Mar 31, 2025 | Resolved | N/A |
| Gross Alpha, Excl. Radon and U | Health-Based | N/A | 17 | Dec 31, 2024 | Resolved | N/A |
| Gross Alpha, Excl. Radon and U | Health-Based | N/A | 17 | Dec 31, 2024 | Resolved | N/A |
| Gross Alpha, Excl. Radon and U | Health-Based | N/A | 17 | Dec 31, 2024 | Resolved | N/A |
| Gross Alpha, Excl. Radon and U | Health-Based | N/A | 17 | Sep 30, 2024 | Resolved | N/A |
| Gross Alpha, Excl. Radon and U | Health-Based | N/A | 17 | Sep 30, 2024 | Resolved | N/A |
| Gross Alpha, Excl. Radon and U | Health-Based | N/A | 17 | Sep 30, 2024 | Resolved | N/A |
| Total Haloacetic Acids (HAA5) | Monitoring | N/A | N/A | Jul 31, 2023 | Resolved | N/A |
Lead & Copper Levels
Violation Timeline
2025(3)
Gross Alpha, Excl. Radon and U
02
Gross Alpha, Excl. Radon and U
02
Gross Alpha, Excl. Radon and U
02
2024(6)
Gross Alpha, Excl. Radon and U
02
Gross Alpha, Excl. Radon and U
02
Gross Alpha, Excl. Radon and U
02
Gross Alpha, Excl. Radon and U
02
Gross Alpha, Excl. Radon and U
02
Gross Alpha, Excl. Radon and U
02
How Does This Compare?
RAPID CITY (57709) has 46 recorded violations, including 23 health-based. All violations have been resolved, which is a positive sign for current water quality. 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.
Activated Carbon Filter
Excellent for removing chlorine, chloramine, and disinfection byproducts like THMs and HAAs. Available as pitcher filters, countertop, or under-sink units.
Targets:THMs, HAAs, Chlorine, Chloramine, Taste & Odor
Look for:NSF/ANSI 42 & 53 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.