Is Chubbuck City of Tap Water Safe? Quality Report

Water source: Ground water
Ownership: Local government
Counties served: Bannock

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.

health-based violations

violations on file

still open

Violation	Type	Status	Period
MCL	Health-based	Archived	1992-10-01 → 1993-09-30
MCL	Health-based	Archived	1991-09-01 → 1991-09-30
RPT	Monitoring	Unaddressed	2025-07-02
MR	Monitoring	Archived	2011-01-01 → 2011-12-31
MR	Monitoring	Archived	2011-01-01 → 2011-12-31
MR	Monitoring	Archived	2011-01-01 → 2011-12-31
MR	Monitoring	Archived	2011-01-01 → 2011-12-31
MR	Monitoring	Archived	2011-01-01 → 2011-12-31
MR	Monitoring	Archived	2011-01-01 → 2011-12-31
MR	Monitoring	Archived	2011-01-01 → 2011-12-31

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.

Contaminant	Level vs EPA limit	Detection rate	Source	Period
Nitrate	5720.5 µg/L 57% of the EPA limit 10000 µg/L worst single sample: 5820 µg/L	80/80	SYR4	2012–2019
Tetrachloroethylene	3.1275 µg/L 63% of the EPA limit 5 µg/L worst single sample: 5.23 µg/L	36/48	SYR4	2012–2019
TTHM	11.3 µg/L 14% of the EPA limit 80 µg/L worst single sample: 11.6 µg/L	21/58	SYR4	2012–2019
Lead	0.0020 mg/L 13% of the EPA limit 0.0150 mg/L	16/16	LCR	2025
Combined Uranium	2.826 µg/L 9.4% of the EPA limit 30 µg/L worst single sample: 3.12 µg/L	15/15	SYR4	2013–2019
Total Haloacetic Acids (HAA5)	1.8215 µg/L 3% of the EPA limit 60 µg/L worst single sample: 1.88 µg/L	14/20	SYR4	2012–2019
Combined Radium (-226 And -228)	1.776 pCi/L 36% of the EPA limit 5 pCi/L worst single sample: 1.83 pCi/L	13/14	SYR4	2013–2019
Lithium	37 µg/L No EPA limit set	10/10	UCMR-5	2024
Gross Alpha, Excl. Radon And U	12.816 pCi/L 85% of the EPA limit 15 pCi/L worst single sample: 14.7 pCi/L	7/10	SYR4	2013–2019
Barium	166.75 µg/L 8.3% of the EPA limit 2000 µg/L worst single sample: 168 µg/L	6/6	SYR4	2016–2019
Fluoride	400 µg/L 10% of the EPA limit 4000 µg/L	6/6	SYR4	2016–2019
Arsenic	3.6 µg/L 36% of the EPA limit 10 µg/L worst single sample: 4 µg/L	5/5	SYR4	2016–2019
Chromium	13 µg/L 13% of the EPA limit 100 µg/L	5/6	SYR4	2016–2019
Nitrate-Nitrite	4940 µg/L 49% of the EPA limit 10000 µg/L worst single sample: 5210 µg/L	5/5	SYR4	2016–2019
Selenium	2.7 µg/L 5.4% of the EPA limit 50 µg/L worst single sample: 3 µg/L	4/6	SYR4	2016–2019
Copper	7.7 µg/L 0.6% of the EPA limit 1300 µg/L worst single sample: 8 µg/L	2/3	SYR4	2016–2019
1,1,2-Trichloroethane	0.5400 µg/L 11% of the EPA limit 5 µg/L	1/49	SYR4	2012–2019
Nitrite	280 µg/L 28% of the EPA limit 1000 µg/L	1/5	SYR4	2016–2019

85 contaminants tested, none detected

1,1,1-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, TotalAsbestosAtrazineBhc-GammaBenzeneBenzo(A)PyreneBeryllium, TotalChlorobenzeneCyanideCadmiumCarbofuranCarbon TetrachlorideChlordaneDichloromethaneDalaponDi(2-ethylhexyl) AdipateDi(2-ethylhexyl) PhthalateDinosebDiquatEthylene DibromideEndothallEndrinEthylbenzeneGlyphosateHexachlorobenzeneHfpo-DaHeptachlorHeptachlor EpoxideHexachlorocyclopentadieneLassoLeadMercuryMethoxychlorNetfosaaNfdhaNmefosaaOxamylPfbaPFBSPfdaPfdoaPfeesaPfhpaPfhpsPfhxaPFHXSPfmbaPfmpaPFNAPFOAPFOSPfpeaPfpesPftaPftrdaPfunaPentachlorophenolPicloramSimazineStyreneThallium, TotalTolueneTotal Polychlorinated Biphenyls (PCB)ToxapheneTrichloroethyleneVinyl ChlorideXylenes, Totalcis-1,2-DichloroethyleneO-DichlorobenzeneP-Dichlorobenzenetrans-1,2-Dichloroethylene

Utility contact

Contact: MORRISON, BRIDGER
Phone: 208-239-3207
Email: [email protected]

Frequently asked questions about Chubbuck City of

Is Chubbuck City of tap water safe to drink?

EPA monitoring detected 18 contaminants in Chubbuck 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 Chubbuck City of's water?

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

How many people does Chubbuck City of serve?

Chubbuck City of reports serving 15,842 people in Idaho, per its EPA record.

Has Chubbuck City of had any water quality violations?

The EPA has 36 violations on file for Chubbuck City of, of which 2 are health-based (a contaminant limit or required treatment was breached) and 1 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.