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Tap water quality report

Black Rock Utilities Inc

EPA monitoring tested this supplier for 41 contaminants and detected 9. A detection doesn't automatically mean the water is unsafe — the level and EPA source for each is below.

41
contaminants tested
9
detected
1,014
people served
2
health-based violations
Idaho rankingsLead in IdahoPFAS in Idaho
Water source
Ground water
Ownership
Private
Counties served
Kootenai

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.

2
health-based violations
34
violations on file
0
still open
ViolationTypeStatusPeriod
MCL Health-based Archived 2010-12-01 → 2010-12-31
MCL Health-based Archived 2010-12-01 → 2010-12-31
MR Monitoring Archived 2022-07-01 → 2022-09-30
MR Monitoring Archived 2022-07-01 → 2022-09-30
MR Monitoring Archived 2018-01-01 → 2018-03-31
MR Monitoring Archived 2018-01-01 → 2018-03-31
MON Monitoring Archived 2018-01-01 → 2018-01-31
MON Monitoring Archived 2018-01-01 → 2018-01-31
MON Monitoring Archived 2018-01-01 → 2018-01-31
MON Monitoring Archived 2018-01-01 → 2018-01-31

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
Combined Uranium
4.1175 µg/L 14%
of the EPA limit 30 µg/L
worst single sample: 4.2 µg/L
12/12 SYR4 2015–2016
Combined Radium (-226 And -228)
1.365 pCi/L 27%
of the EPA limit 5 pCi/L
worst single sample: 1.4 pCi/L
11/12 SYR4 2015–2016
Gross Alpha, Excl. Radon And U
6.04 pCi/L 40%
of the EPA limit 15 pCi/L
worst single sample: 6.38 pCi/L
11/12 SYR4 2015–2016
Lead
0.0040 mg/L 27%
of the EPA limit 0.0150 mg/L
 9/9 LCR 2025
Fluoride
482.5 µg/L 12%
of the EPA limit 4000 µg/L
worst single sample: 490 µg/L
6/6 SYR4 2015–2017
Nitrate
123 µg/L 1.2%
of the EPA limit 10000 µg/L
 6/48 SYR4 2012–2019
TTHM
2.264 µg/L 2.8%
of the EPA limit 80 µg/L
worst single sample: 2.35 µg/L
5/5 SYR4 2012–2019
Barium
78.15 µg/L 3.9%
of the EPA limit 2000 µg/L
worst single sample: 80 µg/L
2/3 SYR4 2017
Arsenic
1.6 µg/L 16%
of the EPA limit 10 µg/L
 1/3 SYR4 2017
32 contaminants tested, none detected
1,1,1-Trichloroethane1,1,2-Trichloroethane1,1-Dichloroethylene1,2,4-Trichlorobenzene1,2-Dichloroethane1,2-DichloropropaneAntimony, TotalBenzeneBeryllium, TotalChlorobenzeneCadmiumCarbon TetrachlorideChromiumDichloromethaneEndothallEthylbenzeneMercuryNitrate-NitriteNitriteSeleniumStyreneTetrachloroethyleneThallium, TotalTolueneTotal Haloacetic Acids (HAA5)TrichloroethyleneVinyl ChlorideXylenes, Totalcis-1,2-DichloroethyleneO-DichlorobenzeneP-Dichlorobenzenetrans-1,2-Dichloroethylene

Utility contact

Contact
AGUEROS, BRADEN
Phone
208-772-7867
Email
[email protected]

Frequently asked questions about Black Rock Utilities Inc

Is Black Rock Utilities Inc tap water safe to drink?

EPA monitoring detected 9 contaminants in Black Rock Utilities Inc'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 Black Rock Utilities Inc's water?

EPA monitoring detected Combined Uranium, Combined Radium (-226 And -228), Gross Alpha, Excl. Radon And U, Lead, Fluoride, and others. The full list with the level and data source for each is above.

How many people does Black Rock Utilities Inc serve?

Black Rock Utilities Inc reports serving 1,014 people in Idaho, per its EPA record.

Has Black Rock Utilities Inc had any water quality violations?

The EPA has 34 violations on file for Black Rock Utilities Inc, of which 2 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.