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Tap water quality report

Hilltop Terrace Subdivision

EPA monitoring tested this supplier for 68 contaminants and detected 10. A detection doesn't automatically mean the water is unsafe — the level and EPA source for each is below.

68
contaminants tested
10
detected
230
people served
20
health-based violations
Montana rankingsLead in MontanaPFAS in Montana
Water source
Ground water
Ownership
Private
Counties served
Flathead

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.

20
health-based violations
94
violations on file
2
still open
ViolationTypeStatusPeriod
TT Health-based Resolved 2020-06-02
TT Health-based Resolved 2020-06-02
TT Health-based Resolved 2020-06-02
MCL Health-based Resolved 2002-11-01 → 2002-11-30
MCL Health-based Resolved 2002-11-01 → 2002-11-30
MCL Health-based Resolved 2002-11-01 → 2002-11-30
MCL Health-based Resolved 2002-11-01 → 2002-11-30
MCL Health-based Resolved 2002-11-01 → 2002-11-30
MCL Health-based Resolved 2002-11-01 → 2002-11-30
MCL Health-based Resolved 2002-10-01 → 2002-10-31

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
Nitrate-Nitrite
170 µg/L 1.7%
of the EPA limit 10000 µg/L
 15/15 SYR4 2012–2019
Lead
0.0070 mg/L 47%
of the EPA limit 0.0150 mg/L
 14/14 LCR 2019
Copper
172 µg/L 13%
of the EPA limit 1300 µg/L
worst single sample: 190 µg/L
13/15 SYR4 2013–2019
Nitrate
150 µg/L 1.5%
of the EPA limit 10000 µg/L
 12/12 SYR4 2012–2019
Barium
130 µg/L 6.5%
of the EPA limit 2000 µg/L
 6/6 SYR4 2012–2019
Fluoride
145 µg/L 3.6%
of the EPA limit 4000 µg/L
worst single sample: 150 µg/L
6/6 SYR4 2012–2019
Lead
9.75 µg/L 65%
of the EPA limit 15 µg/L
worst single sample: 12 µg/L
6/15 SYR4 2013–2019
Combined Radium (-226 And -228)
1.7 pCi/L 34%
of the EPA limit 5 pCi/L
 1/2 SYR4 2016
Combined Uranium
2 µg/L 6.7%
of the EPA limit 30 µg/L
 1/2 SYR4 2016
Gross Alpha, Excl. Radon And U
2.3 pCi/L 15%
of the EPA limit 15 pCi/L
 1/2 SYR4 2016
58 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, TotalBromodichloromethaneBromoformChlorobenzeneCadmiumCarbofuranCarbon TetrachlorideChlordaneChloroformChromiumDichloromethaneDalaponDi(2-ethylhexyl) AdipateDi(2-ethylhexyl) PhthalateDibromochloromethaneDinosebEndrinEthylbenzeneHexachlorobenzeneHeptachlorHeptachlor EpoxideHexachlorocyclopentadieneLassoMercuryMethoxychlorNitriteOxamylPentachlorophenolPicloramSeleniumSimazineStyreneTTHMTetrachloroethyleneThallium, TotalTolueneToxapheneTrichloroethyleneVinyl ChlorideXylenes, Totalcis-1,2-DichloroethyleneO-DichlorobenzeneP-Dichlorobenzenetrans-1,2-Dichloroethylene

Utility contact

Contact
AHMANN, JUSTIN
Phone
406-393-2126
Email
[email protected]

Frequently asked questions about Hilltop Terrace Subdivision

Is Hilltop Terrace Subdivision tap water safe to drink?

EPA monitoring detected 10 contaminants in Hilltop Terrace Subdivision'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 Hilltop Terrace Subdivision's water?

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

How many people does Hilltop Terrace Subdivision serve?

Hilltop Terrace Subdivision reports serving 230 people in Montana, per its EPA record.

Has Hilltop Terrace Subdivision had any water quality violations?

The EPA has 94 violations on file for Hilltop Terrace Subdivision, of which 20 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.