Water Quality in FORT THOMPSON, SD (57339)
EPA violation data for public water systems serving ZIP code 57339.
14
Total Violations
1
Health-Based
13
Monitoring / Reporting
12
Resolved
What does this mean?
12 of 14 violations have been resolved. 1 is a health-based violation, meaning contaminant levels exceeded federal safety limits. The remaining 13 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 (14 total)
| Contaminant | Category | MCL Limit | Measured | Date | Status | Health Effects |
|---|---|---|---|---|---|---|
| Lead and Copper Rule | Monitoring | N/A | N/A | Dec 29, 2024 | Resolved | N/A |
| TTHM | Monitoring | N/A | N/A | Mar 31, 2024 | Resolved | N/A |
| Total Haloacetic Acids (HAA5) | Monitoring | N/A | N/A | Mar 31, 2024 | Resolved | N/A |
| TTHM | Monitoring | N/A | N/A | Dec 31, 2023 | Resolved | N/A |
| Total Haloacetic Acids (HAA5) | Monitoring | N/A | N/A | Dec 31, 2023 | Resolved | N/A |
| Lead and Copper Rule | Monitoring | N/A | N/A | Sep 30, 2023 | Resolved | N/A |
| Long Term 2 Enhanced Surface Water Treatment Rule | Health-Based | N/A | N/A | Sep 7, 2022 | Resolved | N/A |
| Revised Total Coliform Rule | Monitoring | N/A | N/A | May 31, 2022 | Active | N/A |
| Revised Total Coliform Rule | Monitoring | N/A | N/A | May 31, 2022 | Active | N/A |
| Fluoride | Monitoring | N/A | N/A | Dec 31, 2021 | Resolved | Bone disease (pain and tenderness of the bones); children may get mottled teeth |
Lead & Copper Levels
Violation Timeline
2024(3)
Lead and Copper Rule
66
TTHM
27
Total Haloacetic Acids (HAA5)
27
2023(3)
TTHM
27
Total Haloacetic Acids (HAA5)
27
Lead and Copper Rule
52
How Does This Compare?
FORT THOMPSON (57339) has 14 recorded violations, including 1 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
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.