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Grangeville, ID Tap Water Quality 2026

Water quality report for Grangeville, ID — PFAS, lead and copper results, violation history and state inspection findings from EPA SDWIS.

A look at Grangeville's drinking water using EPA enforcement records: violations, lead and copper results, PFAS sampling and state inspection findings.

Main Utility: Grangeville Water Dept PWSID: ID2250023 Updated: 2026 Q2
✅

No federal limits exceeded on record

Lead is 2.00 ppb, 13% of the action level and no violations are open. No PFAS was detected.

A

Grangeville earns an A for water quality

Graded on violations, lead, and PFAS, with state inspection findings.

Lead: 2.00 ppb — 13% of the federal action level
PFAS tested, none detected
28 violations since 2015, 0 health-based
No violations currently open
Grangeville's lead level vs. all Idaho community water systems
0 ppb5 ppb10 ppb15 ppb
Lead level: 2.00 ppb — 13% of the federal action level
✓ Lower lead than 75% of Idaho utilities
Population Served
3297
~1502 connections
Water Source
Groundwater
Drawn from wells — SDWIS source code GW
Active Violations
0
28 since 2015, all resolved

Lead & Copper Testing

Lead (Pb)
90th percentile of tap samples collected across the distribution system
13% of EPA action level
2.00 ppb
Action level: 15 ppb
The 90th-percentile lead result is 2.00 ppb, 13% of the 15 ppb federal action level. The action level is a treatment trigger, not a legal maximum, and it is measured across sampled taps rather than at any single home.

Contaminant Violations (2015–Present)

ContaminantTypeMeasuredLimitPeriodStatus
TTHM MONITORING AND REPORTING — 0.080 mg/L 2025 Resolved
Total Haloacetic Acids (HAA5) MONITORING AND REPORTING — 0.060 mg/L 2025 Resolved
Nitrate MONITORING AND REPORTING — 10 mg/L 2025 Archived
1,2,4-Trichlorobenzene MONITORING AND REPORTING — 0.07 mg/L 2020–2025 Archived
cis-1,2-Dichloroethylene MONITORING AND REPORTING — 0.07 mg/L 2020–2025 Archived
Xylenes, Total MONITORING AND REPORTING — 10 mg/L 2020–2025 Archived
DICHLOROMETHANE MONITORING AND REPORTING — 0.005 mg/L 2020–2025 Archived
o-Dichlorobenzene MONITORING AND REPORTING — 0.6 mg/L 2020–2025 Archived
p-Dichlorobenzene MONITORING AND REPORTING — 0.075 mg/L 2020–2025 Archived
Vinyl chloride MONITORING AND REPORTING — 0.002 mg/L 2020–2025 Archived
1,1-Dichloroethylene MONITORING AND REPORTING — 0.007 mg/L 2020–2025 Archived
trans-1,2-Dichloroethylene MONITORING AND REPORTING — 0.1 mg/L 2020–2025 Archived
1,2-Dichloroethane MONITORING AND REPORTING — 0.005 mg/L 2020–2025 Archived
1,1,1-Trichloroethane MONITORING AND REPORTING — 0.2 mg/L 2020–2025 Archived
Carbon tetrachloride MONITORING AND REPORTING — 0.005 mg/L 2020–2025 Archived
1,2-Dichloropropane MONITORING AND REPORTING — 0.005 mg/L 2020–2025 Archived
Trichloroethylene MONITORING AND REPORTING — 0.005 mg/L 2020–2025 Archived
1,1,2-Trichloroethane MONITORING AND REPORTING — 0.005 mg/L 2020–2025 Archived
Tetrachloroethylene MONITORING AND REPORTING — 0.005 mg/L 2020–2025 Archived
CHLOROBENZENE MONITORING AND REPORTING — 0.1 mg/L 2020–2025 Archived
Benzene MONITORING AND REPORTING — 0.005 mg/L 2020–2025 Archived
Toluene MONITORING AND REPORTING — 1 mg/L 2020–2025 Archived
Ethylbenzene MONITORING AND REPORTING — 0.7 mg/L 2020–2025 Archived
Styrene MONITORING AND REPORTING — 0.1 mg/L 2020–2025 Archived
Gross Alpha, Excl. Radon and U MONITORING AND REPORTING — 15 pCi/L 2020–2025 Archived
Combined Uranium MONITORING AND REPORTING — 30 ug/L 2020–2025 Archived
Nitrate MONITORING AND REPORTING — 10 mg/L 2017 Resolved
Nitrite MONITORING AND REPORTING — 1 mg/L 2017–2025 Archived
Understanding violation types MCL violations mean a contaminant exceeded the federal maximum limit — the most serious type.
TT (Treatment Technique) violations mean required treatment procedures weren't followed, but don't necessarily mean contamination occurred.

Violation History

28 violations are on record since 2015, of which 0 were health-based. All have been resolved and none remain open.

About the Main Water System

Utility Grangeville Water Dept
PWSID ID2250023
Water source Groundwater — Drawn from wells — SDWIS source code GW
Population served 3,297
Service connections 1,502
Systems serving this area 1
Regulator State primacy agency
Data through 2026 Q2 — EPA SDWIS

Frequently Asked Questions

Is Grangeville tap water safe to drink? ▼
No federal limit is exceeded on record. No violations are currently open. Lead is 2.00 ppb, 13% of the action level.
Does Grangeville water have PFAS? ▼
It was tested for the six regulated PFAS compounds and none were detected.
Who supplies water to Grangeville? ▼
Grangeville Water Dept (PWSID ID2250023). Groundwater. Drawn from wells — SDWIS source code GW
When was this system last inspected? ▼
It was last inspected on 2023-07-20. No significant deficiencies were recorded.

What Should Grangeville Residents Do?

1
Read your annual water report
Your supplier publishes a Consumer Confidence Report each July covering the prior year.
2
Check for a lead service line
Lead reaches tap water mainly through service lines and household plumbing. Suppliers now publish an inventory identifying lead lines.
3
Flush before drinking
If water has sat in pipes more than six hours, run the cold tap for two minutes before drinking or cooking.

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