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Tap water quality report

Polson City of

EPA monitoring tested this supplier for 104 contaminants and detected 21. A detection doesn't automatically mean the water is unsafe — the level and EPA source for each is below.

104
contaminants tested
21
detected
5,300
people served
2
health-based violations
Montana rankingsLead in MontanaPFAS in Montana
Water source
Ground water
Ownership
Local government
Counties served
Lake

Compliance record

Formal violations the EPA has on file for this supplier. A health-based violation means a contaminant limit or a required treatment was breached; the rest are monitoring or reporting failures — still violations, but not a measured health risk.

2
health-based violations
241
violations on file
0
still open
ViolationTypeStatusPeriod
MCL Health-based Resolved 1995-04-01 → 1995-04-30
MCL Health-based Resolved 1995-04-01 → 1995-04-30
Other Monitoring Resolved 2025-10-01
Other Monitoring Resolved 2025-10-01
MR Monitoring Resolved 2024-01-01 → 2024-12-31
MR Monitoring Resolved 2024-01-01 → 2024-12-31
MR Monitoring Resolved 2024-01-01 → 2024-12-31
Other Monitoring Resolved 2008-07-01
Other Monitoring Resolved 2008-07-01
Other Monitoring Resolved 2008-07-01

Other contaminants detected

Each bar shows the measured level as a share of the EPA limit: green is well under, amber is close to it, red is over. For lead and copper the limit applies to exactly the 90th-percentile figure shown, so red there means a real exceedance. For everything else the limit applies to a running annual average while the figure is the 95th percentile of this system's samples — over 100% is worth reading, but is not by itself a violation. Where a single sample came in higher than that percentile, it is noted under the bar. Formal violations are listed separately.
ContaminantLevel vs EPA limitDetection rateSourcePeriod
Copper
154 µg/L 12%
of the EPA limit 1300 µg/L
worst single sample: 230 µg/L
39/41 SYR4 2014–2017
Nitrate-Nitrite
4435.5 µg/L 44%
of the EPA limit 10000 µg/L
worst single sample: 4460 µg/L
28/28 SYR4 2012–2019
Lead
0.0020 mg/L 13%
of the EPA limit 0.0150 mg/L
 21/21 LCR 2023
TTHM
5.35 µg/L 6.7%
of the EPA limit 80 µg/L
worst single sample: 6.3 µg/L
20/26 SYR4 2013–2019
Lead
11.2 µg/L 75%
of the EPA limit 15 µg/L
worst single sample: 16 µg/L
13/41 SYR4 2014–2017
Dibromoacetic Acid
0.5560 µg/L
No EPA limit set
worst single sample: 0.6100 µg/L
10/15 SYR4 2013–2019
Total Haloacetic Acids (HAA5)
0.7090 µg/L 1.2%
of the EPA limit 60 µg/L
worst single sample: 0.7900 µg/L
10/15 SYR4 2013–2019
Dibromochloromethane
1.73 µg/L
No EPA limit set
worst single sample: 1.8 µg/L
8/26 SYR4 2013–2019
Nitrate
4460 µg/L 45%
of the EPA limit 10000 µg/L
 8/8 SYR4 2016–2019
Barium
234 µg/L 12%
of the EPA limit 2000 µg/L
worst single sample: 240 µg/L
7/7 SYR4 2012–2019
Fluoride
334 µg/L 8.4%
of the EPA limit 4000 µg/L
worst single sample: 400 µg/L
7/7 SYR4 2012–2019
Bromodichloromethane
2.1 µg/L
No EPA limit set
worst single sample: 2.3 µg/L
6/26 SYR4 2013–2019
Bromoform
0.9520 µg/L
No EPA limit set
worst single sample: 0.9600 µg/L
5/26 SYR4 2013–2019
Combined Radium (-226 And -228)
2.705 pCi/L 54%
of the EPA limit 5 pCi/L
worst single sample: 2.9 pCi/L
4/4 SYR4 2016–2019
Chloroform
2.11 µg/L
No EPA limit set
worst single sample: 2.2 µg/L
3/26 SYR4 2013–2019
Combined Uranium
3 µg/L 10%
of the EPA limit 30 µg/L
 3/3 SYR4 2016
Gross Alpha, Excl. Radon And U
6.865 pCi/L 46%
of the EPA limit 15 pCi/L
worst single sample: 6.9 pCi/L
2/3 SYR4 2016
Xylenes, Total
1.95 µg/L 0%
of the EPA limit 10000 µg/L
worst single sample: 2 µg/L
2/11 SYR4 2013–2019
Arsenic
1 µg/L 10%
of the EPA limit 10 µg/L
 1/11 SYR4 2012–2019
Chromium
11 µg/L 11%
of the EPA limit 100 µg/L
 1/7 SYR4 2012–2019
Monobromoacetic Acid
0.5000 µg/L
No EPA limit set
 1/15 SYR4 2013–2019
83 contaminants tested, none detected
1,1,1-Trichloroethane1,1,2-Trichloroethane1,1-Dichloroethylene1,2,4-Trichlorobenzene1,2-Dichloroethane1,2-Dichloropropane11Cl-PF3OUdS2,4,5-TP2,4-D4:2 Fts6:2 Fts8:2 Fts9Cl-PF3ONSAdonaAntimony, TotalAtrazineBhc-GammaBenzeneBenzo(A)PyreneBeryllium, TotalChlorobenzeneCadmiumCarbofuranCarbon TetrachlorideChlordaneDichloromethaneDalaponDi(2-ethylhexyl) AdipateDi(2-ethylhexyl) PhthalateDichloroacetic AcidDinosebEndrinEthylbenzeneHexachlorobenzeneHfpo-DaHeptachlorHeptachlor EpoxideHexachlorocyclopentadieneLassoMercuryMethoxychlorMonochloroacetic AcidNetfosaaNfdhaNmefosaaNitriteOxamylPfbaPFBSPfdaPfdoaPfeesaPfhpaPfhpsPfhxaPFHXSPfmbaPfmpaPFNAPFOAPFOSPfpeaPfpesPftaPftrdaPfunaPentachlorophenolPicloramSeleniumSimazineStyreneTetrachloroethyleneThallium, TotalTolueneToxapheneTrichloroacetic AcidTrichloroethyleneVinyl Chloridecis-1,2-DichloroethyleneLithiumO-DichlorobenzeneP-Dichlorobenzenetrans-1,2-Dichloroethylene

Utility contact

Contact
WALKER, ASHLEY R
Phone
406-883-8215
Email
[email protected]

Frequently asked questions about Polson City of

Is Polson City of tap water safe to drink?

EPA monitoring detected 21 contaminants in Polson City of's water. A detection isn't the same as a violation — most levels are within federal limits. See each level and source above, and the utility's annual Consumer Confidence Report for its official compliance status.

What contaminants were detected in Polson City of's water?

EPA monitoring detected Copper, Nitrate-Nitrite, Lead, TTHM, Lead, and others. The full list with the level and data source for each is above.

How many people does Polson City of serve?

Polson City of reports serving 5,300 people in Montana, per its EPA record.

Has Polson City of had any water quality violations?

The EPA has 241 violations on file for Polson City of, of which 2 are health-based (a contaminant limit or required treatment was breached) and 0 remain open. The rest are monitoring or reporting failures.

Where does this data come from?

Every figure is official EPA drinking-water monitoring — the Lead & Copper Rule, the UCMR-5 nationwide testing program, and the EPA Six-Year Review — not our own testing. Each number is labelled with its source and period.