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Tap water quality report

Rupert City of

EPA monitoring tested this supplier for 76 contaminants and detected 8. A detection doesn't automatically mean the water is unsafe — the level and EPA source for each is below.

76
contaminants tested
8
detected
5,796
people served
3
health-based violations
Idaho rankingsLead in IdahoPFAS in Idaho
Water source
Ground water
Ownership
Local government
Counties served
Minidoka

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.

3
health-based violations
153
violations on file
2
still open
ViolationTypeStatusPeriod
MCL Health-based Archived 2006-12-01 → 2006-12-31
MCL Health-based Archived 2003-11-01 → 2003-11-30
MCL Health-based Archived 1995-10-01 → 1995-10-31
MR Monitoring Unaddressed 2024-01-28
MR Monitoring Unaddressed 2024-01-28
MR Monitoring Resolved 2024-01-01 → 2024-04-01
MR Monitoring Resolved 2024-01-01 → 2024-04-01
MR Monitoring Resolved 2024-01-01 → 2024-04-01
MON Monitoring Resolved 2023-06-01 → 2023-06-30
MON Monitoring Resolved 2023-06-01 → 2023-06-30

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
Lead
0.0030 mg/L 20%
of the EPA limit 0.0150 mg/L
 14/14 LCR 2025
Lithium
150 µg/L
No EPA limit set
 6/6 UCMR-5 2025
Combined Radium (-226 And -228)
3.325 pCi/L 67%
of the EPA limit 5 pCi/L
worst single sample: 3.4 pCi/L
4/4 SYR4 2016–2019
Barium
449 µg/L 22%
of the EPA limit 2000 µg/L
worst single sample: 450 µg/L
3/3 SYR4 2019
Fluoride
778 µg/L 19%
of the EPA limit 4000 µg/L
worst single sample: 780 µg/L
3/3 SYR4 2019
Nitrate
420 µg/L 4.2%
of the EPA limit 10000 µg/L
 2/40 SYR4 2012–2019
Gross Alpha, Excl. Radon And U
1.3 pCi/L 8.7%
of the EPA limit 15 pCi/L
 1/2 SYR4 2016
Total Haloacetic Acids (HAA5)
4.55 µg/L 7.6%
of the EPA limit 60 µg/L
 1/12 SYR4 2012–2019
68 contaminants tested, none detected
1,2-DIBROMO-3-CHLOROPROPANE11Cl-PF3OUdS2,4,5-TP2,4-D4:2 Fts6:2 Fts8:2 Fts9Cl-PF3ONSAdonaAntimony, TotalAsbestosAtrazineBhc-GammaBenzo(A)PyreneBeryllium, TotalCadmiumCarbofuranChlordaneChromiumCombined UraniumDalaponDi(2-ethylhexyl) AdipateDi(2-ethylhexyl) PhthalateDinosebDiquatEthylene DibromideEndothallEndrinGlyphosateHexachlorobenzeneHfpo-DaHeptachlorHeptachlor EpoxideHexachlorocyclopentadieneLassoMercuryMethoxychlorNetfosaaNfdhaNmefosaaOxamylPfbaPFBSPfdaPfdoaPfeesaPfhpaPfhpsPfhxaPFHXSPfmbaPfmpaPFNAPFOAPFOSPfpeaPfpesPftaPftrdaPfunaPentachlorophenolPicloramSeleniumSimazineTTHMThallium, TotalTotal Polychlorinated Biphenyls (PCB)Toxaphene

Utility contact

Contact
ANTHON, KELLY
Phone
208-436-9600
Email
[email protected]

Frequently asked questions about Rupert City of

Is Rupert City of tap water safe to drink?

EPA monitoring detected 8 contaminants in Rupert 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 Rupert City of's water?

EPA monitoring detected Lead, Lithium, Combined Radium (-226 And -228), Barium, Fluoride, and others. The full list with the level and data source for each is above.

How many people does Rupert City of serve?

Rupert City of reports serving 5,796 people in Idaho, per its EPA record.

Has Rupert City of had any water quality violations?

The EPA has 153 violations on file for Rupert City of, of which 3 are health-based (a contaminant limit or required treatment was breached) and 2 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.