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Tap water quality report

Sierra Water Corp

EPA monitoring tested this supplier for 67 contaminants and detected 8. A detection doesn't automatically mean the water is unsafe — the level and EPA source for each is below.

67
contaminants tested
8
detected
70
people served
1
health-based violations
Idaho rankingsLead in IdahoPFAS in Idaho
Water source
Ground water
Ownership
Private
Counties served
Ada

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.

1
health-based violations
52
violations on file
0
still open
ViolationTypeStatusPeriod
MCL Health-based Archived 1994-10-01 → 1994-10-31
MON Monitoring Resolved 2019-06-01 → 2019-06-30
MON Monitoring Resolved 2019-06-01 → 2019-06-30
MON Monitoring Resolved 2019-06-01 → 2019-06-30
MON Monitoring Resolved 2017-10-01 → 2017-10-31
MON Monitoring Resolved 2017-10-01 → 2017-10-31
MON Monitoring Resolved 2017-10-01 → 2017-10-31
MR Monitoring Archived 2008-07-01 → 2008-07-31
MR Monitoring Archived 2007-03-01 → 2007-03-31
MR Monitoring Archived 2006-03-01 → 2006-03-31

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
2300 µg/L 23%
of the EPA limit 10000 µg/L
 16/16 SYR4 2012–2019
Lead
0.0020 mg/L 13%
of the EPA limit 0.0150 mg/L
 12/12 LCR 2024
Combined Uranium
8.95 µg/L 30%
of the EPA limit 30 µg/L
worst single sample: 9 µg/L
2/2 SYR4 2012–2019
Arsenic
2.4 µg/L 24%
of the EPA limit 10 µg/L
 1/1 SYR4 2019
Barium
120 µg/L 6%
of the EPA limit 2000 µg/L
 1/1 SYR4 2019
Fluoride
250 µg/L 6.3%
of the EPA limit 4000 µg/L
 1/1 SYR4 2019
Gross Alpha, Excl. Radon And U
0.8800 pCi/L 5.9%
of the EPA limit 15 pCi/L
 1/2 SYR4 2013–2019
Nitrate-Nitrite
2300 µg/L 23%
of the EPA limit 10000 µg/L
 1/1 SYR4 2019
59 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, TotalChlorobenzeneCadmiumCarbofuranCarbon TetrachlorideChlordaneChromiumCombined Radium (-226 And -228)DichloromethaneDalaponDi(2-ethylhexyl) AdipateDi(2-ethylhexyl) PhthalateDinosebDiquatEthylene DibromideEndothallEndrinEthylbenzeneGlyphosateHexachlorobenzeneHeptachlorHeptachlor EpoxideHexachlorocyclopentadieneLassoMercuryMethoxychlorNitriteOxamylPentachlorophenolPicloramSeleniumSimazineStyreneTetrachloroethyleneThallium, TotalTolueneTotal Polychlorinated Biphenyls (PCB)ToxapheneTrichloroethyleneVinyl ChlorideXylenes, Totalcis-1,2-DichloroethyleneO-DichlorobenzeneP-Dichlorobenzenetrans-1,2-Dichloroethylene

Utility contact

Contact
MARES, BRIAN
Phone
208-789-4574
Email
[email protected]

Frequently asked questions about Sierra Water Corp

Is Sierra Water Corp tap water safe to drink?

EPA monitoring detected 8 contaminants in Sierra Water Corp'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 Sierra Water Corp's water?

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

How many people does Sierra Water Corp serve?

Sierra Water Corp reports serving 70 people in Idaho, per its EPA record.

Has Sierra Water Corp had any water quality violations?

The EPA has 52 violations on file for Sierra Water Corp, of which 1 is 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.