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Tap water quality report

Grangeville Water Dept

EPA monitoring tested this supplier for 99 contaminants and detected 12. A detection doesn't automatically mean the water is unsafe — the level and EPA source for each is below.

99
contaminants tested
12
detected
3,151
people served
5
health-based violations
Idaho rankingsLead in IdahoPFAS in Idaho
Water source
Ground water
Ownership
Local government
Counties served
Idaho

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.

5
health-based violations
63
violations on file
0
still open
ViolationTypeStatusPeriod
MCL Health-based Archived 2009-09-01 → 2009-09-30
MCL Health-based Archived 1993-08-01 → 1993-08-31
MCL Health-based Archived 1993-07-01 → 1993-07-31
MCL Health-based Archived 1992-11-01 → 1992-11-30
MCL Health-based Archived 1991-10-01 → 1991-12-31
MR Monitoring Resolved 2025-01-01 → 2025-12-31
MR Monitoring Resolved 2025-01-01 → 2025-12-31
MR Monitoring Resolved 2025-01-01 → 2025-12-31
MR Monitoring Archived 2025-01-01 → 2025-12-31
MR Monitoring Archived 2025-01-01 → 2025-12-31

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.
ContaminantLevel vs EPA limitDetection rateSourcePeriod
Nitrate
2390 µg/L 24%
of the EPA limit 10000 µg/L
worst single sample: 2650 µg/L
48/80 SYR4 2012–2019
Lead
0.0020 mg/L 13%
of the EPA limit 0.0150 mg/L
 10/10 LCR 2025
Barium
27.85 µg/L 1.4%
of the EPA limit 2000 µg/L
worst single sample: 28.8 µg/L
6/6 SYR4 2013–2019
Combined Radium (-226 And -228)
0.9918 pCi/L 20%
of the EPA limit 5 pCi/L
worst single sample: 1.07 pCi/L
6/7 SYR4 2013–2019
Fluoride
491.1 µg/L 12%
of the EPA limit 4000 µg/L
worst single sample: 495 µg/L
4/4 SYR4 2019
TTHM
3.2445 µg/L 4.1%
of the EPA limit 80 µg/L
worst single sample: 3.27 µg/L
4/26 SYR4 2012–2019
Chromium
12.669 µg/L 13%
of the EPA limit 100 µg/L
worst single sample: 13.8 µg/L
3/6 SYR4 2013–2019
Tetrachloroethylene
1.76 µg/L 35%
of the EPA limit 5 µg/L
 3/12 SYR4 2013–2019
Lithium
15 µg/L
No EPA limit set
 3/10 UCMR-5 2025
Combined Uranium
1.04 µg/L 3.5%
of the EPA limit 30 µg/L
 1/7 SYR4 2013–2019
Gross Alpha, Excl. Radon And U
0.8810 pCi/L 5.9%
of the EPA limit 15 pCi/L
 1/1 SYR4 2013
Toluene
0.8600 µg/L 0.1%
of the EPA limit 1000 µg/L
 1/12 SYR4 2013–2019
87 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, TotalArsenicAsbestosAtrazineBhc-GammaBenzeneBenzo(A)PyreneBeryllium, TotalChlorobenzeneCadmiumCarbofuranCarbon TetrachlorideChlordaneDichloromethaneDalaponDi(2-ethylhexyl) AdipateDi(2-ethylhexyl) PhthalateDinosebDiquatEthylene DibromideEndothallEndrinEthylbenzeneGlyphosateHexachlorobenzeneHfpo-DaHeptachlorHeptachlor EpoxideHexachlorocyclopentadieneLassoMercuryMethoxychlorNetfosaaNfdhaNmefosaaNitriteOxamylPfbaPFBSPfdaPfdoaPfeesaPfhpaPfhpsPfhxaPFHXSPfmbaPfmpaPFNAPFOAPFOSPfpeaPfpesPftaPftrdaPfunaPentachlorophenolPicloramSeleniumSimazineStyreneThallium, TotalTotal Haloacetic Acids (HAA5)Total Polychlorinated Biphenyls (PCB)ToxapheneTrichloroethyleneVinyl ChlorideXylenes, Totalcis-1,2-DichloroethyleneO-DichlorobenzeneP-Dichlorobenzenetrans-1,2-Dichloroethylene

Utility contact

Contact
MAGER, ROBERT D
Phone
208-507-1737
Email
[email protected]

Frequently asked questions about Grangeville Water Dept

Is Grangeville Water Dept tap water safe to drink?

EPA monitoring detected 12 contaminants in Grangeville Water Dept'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 Grangeville Water Dept's water?

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

How many people does Grangeville Water Dept serve?

Grangeville Water Dept reports serving 3,151 people in Idaho, per its EPA record.

Has Grangeville Water Dept had any water quality violations?

The EPA has 63 violations on file for Grangeville Water Dept, of which 5 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.