Water Quality in MISSOULA, MT (59803)
EPA violation data for public water systems serving ZIP code 59803.
141
Total Violations
0
Health-Based
141
Monitoring / Reporting
141
Resolved
What does this mean?
141 of 141 violations have been resolved. None of these are health-based violations — no contaminant levels exceeded federal safety limits. The remaining 141 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 (141 total)
| Contaminant | Category | MCL Limit | Measured | Date | Status | Health Effects |
|---|---|---|---|---|---|---|
| Revised Total Coliform Rule | Monitoring | N/A | N/A | Aug 31, 2023 | Resolved | N/A |
| Revised Total Coliform Rule | Monitoring | N/A | N/A | Aug 31, 2023 | Resolved | N/A |
| Revised Total Coliform Rule | Monitoring | N/A | N/A | Aug 31, 2023 | Resolved | N/A |
| OXAMYL | Monitoring | N/A | N/A | Jun 30, 2022 | Resolved | N/A |
| Atrazine | Monitoring | N/A | N/A | Jun 30, 2022 | Resolved | Cardiovascular system or reproductive problems |
| Atrazine | Monitoring | N/A | N/A | Jun 30, 2022 | Resolved | Cardiovascular system or reproductive problems |
| Benzo(a)pyrene | Monitoring | N/A | N/A | Jun 30, 2022 | Resolved | N/A |
| Benzo(a)pyrene | Monitoring | N/A | N/A | Jun 30, 2022 | Resolved | N/A |
| Benzo(a)pyrene | Monitoring | N/A | N/A | Jun 30, 2022 | Resolved | N/A |
| Atrazine | Monitoring | N/A | N/A | Jun 30, 2022 | Resolved | Cardiovascular system or reproductive problems |
Lead & Copper Levels
Violation Timeline
2023(3)
Revised Total Coliform Rule
3A
Revised Total Coliform Rule
3A
Revised Total Coliform Rule
3A
2022(69)
OXAMYL
03
Atrazine
03
Atrazine
03
Benzo(a)pyrene
03
Benzo(a)pyrene
03
Benzo(a)pyrene
03
Atrazine
03
OXAMYL
03
OXAMYL
03
Endrin
03
Endrin
03
Endrin
03
BHC-GAMMA
03
BHC-GAMMA
03
BHC-GAMMA
03
Toxaphene
03
Toxaphene
03
Toxaphene
03
Di(2-ethylhexyl) adipate
03
Di(2-ethylhexyl) adipate
03
Di(2-ethylhexyl) adipate
03
Di(2-ethylhexyl) phthalate
03
Di(2-ethylhexyl) phthalate
03
Di(2-ethylhexyl) phthalate
03
Picloram
03
Picloram
03
Picloram
03
Dinoseb
03
Dinoseb
03
Dinoseb
03
Heptachlor
03
Heptachlor
03
Heptachlor
03
Heptachlor epoxide
03
Heptachlor epoxide
03
Heptachlor epoxide
03
2,4-D
03
2,4-D
03
2,4-D
03
2,4,5-TP
03
2,4,5-TP
03
2,4,5-TP
03
HEXACHLOROBENZENE
03
HEXACHLOROBENZENE
03
HEXACHLOROBENZENE
03
Chlordane
03
Chlordane
03
Chlordane
03
Methoxychlor
03
Simazine
03
Simazine
03
Methoxychlor
03
Methoxychlor
03
Dalapon
03
Dalapon
03
Dalapon
03
LASSO
03
Pentachlorophenol
03
Pentachlorophenol
03
Simazine
03
Hexachlorocyclopentadiene
03
Hexachlorocyclopentadiene
03
Hexachlorocyclopentadiene
03
Carbofuran
03
Carbofuran
03
Carbofuran
03
LASSO
03
LASSO
03
Pentachlorophenol
03
How Does This Compare?
MISSOULA (59803) has 141 recorded violations, none of which are 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.
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.