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Tap water quality report

Seville Colony

EPA monitoring tested this supplier for 72 contaminants and detected 18. A detection doesn't automatically mean the water is unsafe — the level and EPA source for each is below.

72
contaminants tested
18
detected
116
people served
14
health-based violations
Montana rankingsLead in MontanaPFAS in Montana
Water source
Surface water
Ownership
Private
Counties served
Glacier

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.

14
health-based violations
240
violations on file
0
still open
ViolationTypeStatusPeriod
TT Health-based Resolved 2010-05-01 → 2010-05-31
TT Health-based Resolved 2010-05-01 → 2010-05-31
TT Health-based Resolved 2010-05-01 → 2010-05-31
TT Health-based Resolved 2010-05-01 → 2010-05-31
TT Health-based Resolved 1995-06-01 → 1995-06-30
TT Health-based Resolved 1995-04-01 → 1995-04-30
TT Health-based Resolved 1995-03-01 → 1995-03-31
TT Health-based Resolved 1995-02-01 → 1995-02-28
TT Health-based Resolved 1994-11-01 → 1994-11-30
TT Health-based Resolved 1994-10-01 → 1994-10-31

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
Bromodichloromethane
8.55 µg/L
No EPA limit set
worst single sample: 12 µg/L
16/16 SYR4 2012–2019
Chloroform
22 µg/L
No EPA limit set
 16/16 SYR4 2012–2019
Nitrate-Nitrite
340 µg/L 3.4%
of the EPA limit 10000 µg/L
 16/16 SYR4 2012–2019
TTHM
32 µg/L 40%
of the EPA limit 80 µg/L
worst single sample: 35 µg/L
16/16 SYR4 2012–2019
Lead
0.0 mg/L 0%
of the EPA limit 0.0150 mg/L
 12/12 LCR 2024
Dibromochloromethane
2.92 µg/L
No EPA limit set
worst single sample: 4 µg/L
9/16 SYR4 2012–2019
Barium
200 µg/L 10%
of the EPA limit 2000 µg/L
 8/8 SYR4 2012–2019
Dichloroacetic Acid
11 µg/L
No EPA limit set
 8/8 SYR4 2012–2019
Total Haloacetic Acids (HAA5)
22.3 µg/L 37%
of the EPA limit 60 µg/L
worst single sample: 23 µg/L
8/8 SYR4 2012–2019
Trichloroacetic Acid
10.65 µg/L
No EPA limit set
worst single sample: 11 µg/L
8/8 SYR4 2012–2019
Dibromoacetic Acid
0.9370 µg/L
No EPA limit set
worst single sample: 1 µg/L
3/8 SYR4 2012–2019
Copper
16.8 µg/L 1.3%
of the EPA limit 1300 µg/L
worst single sample: 17 µg/L
2/17 SYR4 2012–2018
Monochloroacetic Acid
0.9975 µg/L
No EPA limit set
worst single sample: 1 µg/L
2/8 SYR4 2012–2019
Selenium
1.95 µg/L 3.9%
of the EPA limit 50 µg/L
worst single sample: 2 µg/L
2/8 SYR4 2012–2019
Combined Radium (-226 And -228)
1 pCi/L 20%
of the EPA limit 5 pCi/L
 1/2 SYR4 2014–2017
Combined Uranium
1 µg/L 3.3%
of the EPA limit 30 µg/L
 1/2 SYR4 2014–2017
Fluoride
100 µg/L 2.5%
of the EPA limit 4000 µg/L
 1/8 SYR4 2012–2019
Gross Alpha, Excl. Radon And U
5.3 pCi/L 35%
of the EPA limit 15 pCi/L
 1/2 SYR4 2014–2017
54 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, TotalArsenicAtrazineBhc-GammaBenzeneBenzo(A)PyreneBeryllium, TotalBromoformChlorobenzeneCadmiumCarbofuranCarbon TetrachlorideChlordaneChromiumDichloromethaneDalaponDi(2-ethylhexyl) AdipateDi(2-ethylhexyl) PhthalateDinosebEndrinEthylbenzeneHexachlorobenzeneHeptachlorHeptachlor EpoxideHexachlorocyclopentadieneLassoLeadMercuryMethoxychlorMonobromoacetic AcidOxamylPentachlorophenolPicloramSimazineStyreneTetrachloroethyleneThallium, TotalTolueneToxapheneTrichloroethyleneVinyl ChlorideXylenes, Totalcis-1,2-DichloroethyleneO-DichlorobenzeneP-Dichlorobenzenetrans-1,2-Dichloroethylene

Utility contact

Contact
WALDNER, EDWARD
Phone
406-336-2430

Frequently asked questions about Seville Colony

Is Seville Colony tap water safe to drink?

EPA monitoring detected 18 contaminants in Seville Colony'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 Seville Colony's water?

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

How many people does Seville Colony serve?

Seville Colony reports serving 116 people in Montana, per its EPA record.

Has Seville Colony had any water quality violations?

The EPA has 240 violations on file for Seville Colony, of which 14 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.