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Tap water quality report

Mountain Home, City of

EPA monitoring tested this supplier for 98 contaminants and detected 10. A detection doesn't automatically mean the water is unsafe — the level and EPA source for each is below.

98
contaminants tested
10
detected
14,651
people served
24
health-based violations
Idaho rankingsLead in IdahoPFAS in Idaho
Water source
Ground water
Ownership
Local government
Counties served
Elmore

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.

24
health-based violations
477
violations on file
5
still open
ViolationTypeStatusPeriod
TT Health-based Resolved 2025-08-01
TT Health-based Resolved 2025-08-01
TT Health-based Resolved 2025-08-01
TT Health-based Resolved 2024-10-17
TT Health-based Resolved 2024-10-17
TT Health-based Resolved 2024-10-17
TT Health-based Resolved 2024-10-17
TT Health-based Resolved 2017-08-12
TT Health-based Resolved 2017-08-12
TT Health-based Resolved 2017-08-12

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
2000 µg/L 20%
of the EPA limit 10000 µg/L
worst single sample: 2300 µg/L
136/136 SYR4 2012–2019
TTHM
9.064 µg/L 11%
of the EPA limit 80 µg/L
worst single sample: 14 µg/L
22/60 SYR4 2012–2019
Lead
0.0 mg/L 0%
of the EPA limit 0.0150 mg/L
 16/16 LCR 2025
Fluoride
1705.5 µg/L 43%
of the EPA limit 4000 µg/L
worst single sample: 1790 µg/L
14/14 SYR4 2013–2019
Arsenic
6.15 µg/L 62%
of the EPA limit 10 µg/L
worst single sample: 6.5 µg/L
8/12 SYR4 2013–2019
Chromium
4 µg/L 4%
of the EPA limit 100 µg/L
 8/12 SYR4 2013–2019
Nitrate-Nitrite
2050 µg/L 21%
of the EPA limit 10000 µg/L
worst single sample: 2300 µg/L
6/6 SYR4 2018
Combined Uranium
1.9 µg/L 6.3%
of the EPA limit 30 µg/L
worst single sample: 2 µg/L
3/19 SYR4 2012–2019
Total Haloacetic Acids (HAA5)
3.29 µg/L 5.5%
of the EPA limit 60 µg/L
worst single sample: 3.4 µg/L
3/60 SYR4 2012–2019
Combined Radium (-226 And -228)
0.6445 pCi/L 13%
of the EPA limit 5 pCi/L
worst single sample: 0.6600 pCi/L
2/12 SYR4 2012–2018
88 contaminants tested, none detected
1,1,1-Trichloroethane1,1,2-Trichloroethane1,1-Dichloroethylene1,2,4-Trichlorobenzene1,2-DIBROMO-3-CHLOROPROPANE1,2-Dichloroethane1,2-Dichloropropane11Cl-PF3OUdS2,4,5-TP2,4-D4:2 Fts6:2 Fts8:2 Fts9Cl-PF3ONSAdonaAntimony, TotalAtrazineBhc-GammaBariumBenzeneBenzo(A)PyreneBeryllium, TotalChlorobenzeneCadmiumCarbofuranCarbon TetrachlorideChlordaneDichloromethaneDalaponDi(2-ethylhexyl) AdipateDi(2-ethylhexyl) PhthalateDinosebDiquatEthylene DibromideEndothallEndrinEthylbenzeneGlyphosateHexachlorobenzeneHfpo-DaHeptachlorHeptachlor EpoxideHexachlorocyclopentadieneLassoMercuryMethoxychlorNetfosaaNfdhaNmefosaaNitriteOxamylPfbaPFBSPfdaPfdoaPfeesaPfhpaPfhpsPfhxaPFHXSPfmbaPfmpaPFNAPFOAPFOSPfpeaPfpesPftaPftrdaPfunaPentachlorophenolPicloramSeleniumSimazineStyreneTetrachloroethyleneThallium, TotalTolueneTotal Polychlorinated Biphenyls (PCB)ToxapheneTrichloroethyleneVinyl ChlorideXylenes, Totalcis-1,2-DichloroethyleneLithiumO-DichlorobenzeneP-Dichlorobenzenetrans-1,2-Dichloroethylene

Utility contact

Contact
SONNENTAG, DAVID
Phone
208-587-2108
Email
[email protected]

Frequently asked questions about Mountain Home, City of

Is Mountain Home, City of tap water safe to drink?

EPA monitoring detected 10 contaminants in Mountain Home, 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 Mountain Home, City of's water?

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

How many people does Mountain Home, City of serve?

Mountain Home, City of reports serving 14,651 people in Idaho, per its EPA record.

Has Mountain Home, City of had any water quality violations?

The EPA has 477 violations on file for Mountain Home, City of, of which 24 are health-based (a contaminant limit or required treatment was breached) and 5 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.