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Tap water quality report

Mountain Heritage Water

EPA monitoring tested this supplier for 74 contaminants and detected 17. A detection doesn't automatically mean the water is unsafe — the level and EPA source for each is below.

74
contaminants tested
17
detected
175
people served
6
health-based violations
Montana rankingsLead in MontanaPFAS in Montana
Water source
Ground water
Ownership
Private
Counties served
Lewis and Clark

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.

6
health-based violations
100
violations on file
0
still open
ViolationTypeStatusPeriod
MCL Health-based Resolved 2000-09-01 → 2000-09-30
MCL Health-based Resolved 2000-09-01 → 2000-09-30
MCL Health-based Resolved 2000-09-01 → 2000-09-30
MCL Health-based Resolved 2000-09-01 → 2000-09-30
MCL Health-based Resolved 2000-09-01 → 2000-09-30
MCL Health-based Resolved 2000-09-01 → 2000-09-30
MR Monitoring Resolved 2020-01-01 → 2022-12-31
MR Monitoring Resolved 2020-01-01 → 2022-12-31
MR Monitoring Resolved 2020-01-01 → 2022-12-31
MR Monitoring Resolved 2020-01-01 → 2022-12-31

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
Copper
103.35 µg/L 8%
of the EPA limit 1300 µg/L
worst single sample: 105 µg/L
34/35 SYR4 2013–2018
Lead
0.0100 mg/L 67%
of the EPA limit 0.0150 mg/L
 16/16 LCR 2024
Nitrate-Nitrite
1080 µg/L 11%
of the EPA limit 10000 µg/L
 16/16 SYR4 2012–2019
Lead
7.25 µg/L 48%
of the EPA limit 15 µg/L
worst single sample: 10 µg/L
12/35 SYR4 2013–2018
Arsenic
5.9 µg/L 59%
of the EPA limit 10 µg/L
worst single sample: 6 µg/L
3/3 SYR4 2013–2019
Dibromoacetic Acid
0.9680 µg/L
No EPA limit set
worst single sample: 1.01 µg/L
3/4 SYR4 2012–2015
Total Haloacetic Acids (HAA5)
4.079 µg/L 6.8%
of the EPA limit 60 µg/L
worst single sample: 4.42 µg/L
3/4 SYR4 2012–2015
Bromoform
2.2975 µg/L
No EPA limit set
worst single sample: 2.35 µg/L
2/7 SYR4 2012–2019
TTHM
3.2285 µg/L 4%
of the EPA limit 80 µg/L
worst single sample: 3.33 µg/L
2/4 SYR4 2012–2015
Barium
26 µg/L 1.3%
of the EPA limit 2000 µg/L
 1/1 SYR4 2013
Combined Radium (-226 And -228)
0.9000 pCi/L 18%
of the EPA limit 5 pCi/L
 1/1 SYR4 2013
Dibromochloromethane
0.7200 µg/L
No EPA limit set
 1/7 SYR4 2012–2019
Dichloroacetic Acid
1.23 µg/L
No EPA limit set
 1/4 SYR4 2012–2015
Fluoride
610 µg/L 15%
of the EPA limit 4000 µg/L
 1/1 SYR4 2013
Gross Alpha, Excl. Radon And U
2.8 pCi/L 19%
of the EPA limit 15 pCi/L
 1/1 SYR4 2013
Selenium
2 µg/L 4%
of the EPA limit 50 µg/L
 1/1 SYR4 2013
Trichloroacetic Acid
3.05 µg/L
No EPA limit set
 1/4 SYR4 2012–2015
57 contaminants tested, none detected
1,1,1-Trichloroethane1,1,2-Trichloroethane1,1-Dichloroethylene1,2,4-Trichlorobenzene1,2-DIBROMO-3-CHLOROPROPANE1,2-Dichloroethane1,2-Dichloropropane2,4,5-TP2,4-DAntimony, TotalAtrazineBhc-GammaBenzeneBenzo(A)PyreneBeryllium, TotalBromodichloromethaneChlorobenzeneCadmiumCarbofuranCarbon TetrachlorideChlordaneChloroformChromiumDichloromethaneDalaponDi(2-ethylhexyl) AdipateDi(2-ethylhexyl) PhthalateDinosebEthylene DibromideEndrinEthylbenzeneHexachlorobenzeneHeptachlorHeptachlor EpoxideHexachlorocyclopentadieneLassoMercuryMethoxychlorMonobromoacetic AcidMonochloroacetic AcidOxamylPentachlorophenolPicloramSimazineStyreneTetrachloroethyleneThallium, TotalTolueneTotal Polychlorinated Biphenyls (PCB)ToxapheneTrichloroethyleneVinyl ChlorideXylenes, Totalcis-1,2-DichloroethyleneO-DichlorobenzeneP-Dichlorobenzenetrans-1,2-Dichloroethylene

Utility contact

Contact
SWERINGEN, DENNIS
Phone
805-390-4527
Email
[email protected]

Frequently asked questions about Mountain Heritage Water

Is Mountain Heritage Water tap water safe to drink?

EPA monitoring detected 17 contaminants in Mountain Heritage Water'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 Mountain Heritage Water's water?

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

How many people does Mountain Heritage Water serve?

Mountain Heritage Water reports serving 175 people in Montana, per its EPA record.

Has Mountain Heritage Water had any water quality violations?

The EPA has 100 violations on file for Mountain Heritage Water, of which 6 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.