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Tap water quality report

Belfry Carbon Co Water and Sewer Dist

EPA monitoring tested this supplier for 67 contaminants and detected 12. A detection doesn't automatically mean the water is unsafe — the level and EPA source for each is below.

67
contaminants tested
12
detected
205
people served
5
health-based violations
Montana rankingsLead in MontanaPFAS in Montana
Water source
Ground water
Ownership
Local government
Counties served
Carbon

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.

5
health-based violations
22
violations on file
2
still open
ViolationTypeStatusPeriod
MCL Health-based Resolved 2016-01-01 → 2016-01-31
MCL Health-based Resolved 2016-01-01 → 2016-01-31
MCL Health-based Resolved 2016-01-01 → 2016-01-31
MCL Health-based Resolved 2016-01-01 → 2016-01-31
MCL Health-based Resolved 2016-01-01 → 2016-01-31
MR Monitoring Unaddressed 2025-10-01
MR Monitoring Unaddressed 2025-10-01
MR Monitoring Resolved 2018-10-01
MR Monitoring Resolved 2018-10-01
MR Monitoring Resolved 2018-10-01

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
Nitrate-Nitrite
5575.5 µg/L 56%
of the EPA limit 10000 µg/L
worst single sample: 6830 µg/L
34/34 SYR4 2012–2019
Copper
334.5 µg/L 26%
of the EPA limit 1300 µg/L
worst single sample: 780 µg/L
16/16 SYR4 2012–2019
Lead
0.0040 mg/L 27%
of the EPA limit 0.0150 mg/L
 12/12 LCR 2025
Combined Uranium
11 µg/L 37%
of the EPA limit 30 µg/L
 8/8 SYR4 2012–2018
Lead
3.3 µg/L 22%
of the EPA limit 15 µg/L
worst single sample: 4 µg/L
8/16 SYR4 2012–2019
Combined Radium (-226 And -228)
3.06 pCi/L 61%
of the EPA limit 5 pCi/L
worst single sample: 3.3 pCi/L
4/7 SYR4 2012–2018
Fluoride
300 µg/L 7.5%
of the EPA limit 4000 µg/L
 4/4 SYR4 2012–2019
Barium
88 µg/L 4.4%
of the EPA limit 2000 µg/L
worst single sample: 90 µg/L
3/4 SYR4 2012–2019
Gross Alpha, Excl. Radon And U
5.53 pCi/L 37%
of the EPA limit 15 pCi/L
worst single sample: 5.7 pCi/L
3/7 SYR4 2012–2018
Selenium
5 µg/L 10%
of the EPA limit 50 µg/L
 3/4 SYR4 2012–2019
Arsenic
1 µg/L 10%
of the EPA limit 10 µg/L
 1/6 SYR4 2012–2019
Nitrite
160 µg/L 16%
of the EPA limit 1000 µg/L
 1/1 SYR4 2015
55 contaminants tested, none detected
1,1,1-Trichloroethane1,1,2-Trichloroethane1,1-Dichloroethylene1,2,4-Trichlorobenzene1,2-Dichloroethane1,2-Dichloropropane2,4,5-TP2,4-DAntimony, TotalAtrazineBhc-GammaBenzeneBenzo(A)PyreneBeryllium, TotalBromodichloromethaneBromoformChlorobenzeneCadmiumCarbofuranCarbon TetrachlorideChlordaneChloroformChromiumDichloromethaneDalaponDi(2-ethylhexyl) AdipateDi(2-ethylhexyl) PhthalateDibromochloromethaneDinosebEndrinEthylbenzeneHexachlorobenzeneHeptachlorHeptachlor EpoxideHexachlorocyclopentadieneLassoMercuryMethoxychlorOxamylPentachlorophenolPicloramSimazineStyreneTTHMTetrachloroethyleneThallium, TotalTolueneToxapheneTrichloroethyleneVinyl ChlorideXylenes, Totalcis-1,2-DichloroethyleneO-DichlorobenzeneP-Dichlorobenzenetrans-1,2-Dichloroethylene

Utility contact

Contact
BELFRY CARBON CO WATER & SEWER DIST
Phone
406-664-3220

Frequently asked questions about Belfry Carbon Co Water and Sewer Dist

Is Belfry Carbon Co Water and Sewer Dist tap water safe to drink?

EPA monitoring detected 12 contaminants in Belfry Carbon Co Water and Sewer Dist'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 Belfry Carbon Co Water and Sewer Dist's water?

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

How many people does Belfry Carbon Co Water and Sewer Dist serve?

Belfry Carbon Co Water and Sewer Dist reports serving 205 people in Montana, per its EPA record.

Has Belfry Carbon Co Water and Sewer Dist had any water quality violations?

The EPA has 22 violations on file for Belfry Carbon Co Water and Sewer Dist, of which 5 are health-based (a contaminant limit or required treatment was breached) and 2 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.