Water Quality in RAPID CITY, SD (57703)
EPA violation data for public water systems serving ZIP code 57703.
38
Total Violations
18
Health-Based
20
Monitoring / Reporting
38
Resolved
What does this mean?
38 of 38 violations have been resolved. 18 are health-based violations, meaning contaminant levels exceeded federal safety limits. The remaining 20 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 (38 total)
| Contaminant | Category | MCL Limit | Measured | Date | Status | Health Effects |
|---|---|---|---|---|---|---|
| Combined Radium (-226 and -228) | Health-Based | N/A | 7 | Jun 30, 2025 | Resolved | N/A |
| Stage 1 Disinfectants and Disinfection Byproducts Rule | Health-Based | N/A | N/A | Jan 31, 2025 | Resolved | N/A |
| Stage 1 Disinfectants and Disinfection Byproducts Rule | Health-Based | N/A | N/A | Jan 31, 2025 | Resolved | N/A |
| Stage 1 Disinfectants and Disinfection Byproducts Rule | Health-Based | N/A | N/A | Jan 31, 2025 | Resolved | N/A |
| Total Haloacetic Acids (HAA5) | Monitoring | N/A | N/A | Jul 31, 2023 | Resolved | N/A |
| Total Haloacetic Acids (HAA5) | Monitoring | N/A | N/A | Jul 31, 2023 | Resolved | N/A |
| TTHM | Monitoring | N/A | N/A | Jul 31, 2023 | Resolved | N/A |
| TTHM | Monitoring | N/A | N/A | Jul 31, 2023 | Resolved | N/A |
| Public Notice | Monitoring | N/A | N/A | Mar 11, 2023 | Resolved | N/A |
| Public Notice | Monitoring | N/A | N/A | Mar 11, 2023 | Resolved | N/A |
Lead & Copper Levels
Violation Timeline
2025(4)
Combined Radium (-226 and -228)
02
Stage 1 Disinfectants and Disinfection Byproducts Rule
12
Stage 1 Disinfectants and Disinfection Byproducts Rule
12
Stage 1 Disinfectants and Disinfection Byproducts Rule
12
2023(7)
Total Haloacetic Acids (HAA5)
27
Total Haloacetic Acids (HAA5)
27
TTHM
27
TTHM
27
Public Notice
75
Public Notice
75
Public Notice
75
How Does This Compare?
RAPID CITY (57703) has 38 recorded violations, including 18 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.