Idaho

Water quality data from the EPA Safe Drinking Water Information System

Lead Risk: Caution

Water Systems

4,387

Active public water systems

Population Served

1.75M

Residents with piped water

Lead Violations

Systems exceeding 15 ppb

Copper Violations

108

Lead & Copper Rule

Average Lead Level

2.44 ppb

EPA Action Level: 15 ppb

MCLG (health goal): 0 ppb

0 ppbAction Level: 15 ppb

Average across 1260 systems with reported lead data.

Violations Detected

129 water systems in Idaho have reported violations under the Lead and Copper Rule. These utilities are required to notify customers and take corrective action.

21 lead violations108 copper violations

Water Systems: Highest Lead Levels

System Name	City	Population	Lead Level	Status	Sample Date
IDAHO FALLS CITY OF	IDAHO FALLS	69,450	4.00 ppb	OK	2022-12-31
MOSCOW WATER DEPT	MOSCOW	26,000	4.00 ppb	OK	2024-12-31
VEOLIA EAGLE	BOISE	10,539	4.00 ppb	OK	2024-06-30
MERIDIAN WATER DEPT	MERIDIAN	147,340	3.60 ppb	OK	2025-12-31
FALLS WATER COMPANY INC	IDAHO FALLS	22,650	3.00 ppb	OK	2023-06-30
JEROME CITY OF	JEROME	13,135	3.00 ppb	OK	2025-12-31
SANDPOINT PUBLIC WORKS DEPT	SANDPOINT	12,284	3.00 ppb	OK	2023-12-31
BLACKFOOT CITY OF	BLACKFOOT	11,922	3.00 ppb	OK	2026-12-31
EAST GREENACRES IRRIGATION DIST	POST FALLS	11,165	3.00 ppb	OK	2024-12-31
VEOLIA WATER IDAHO	BOISE	264,978	2.00 ppb	OK	2025-12-31
NAMPA CITY OF	NAMPA	100,200	2.00 ppb	OK	2024-12-31
POCATELLO CITY OF	POCATELLO	58,231	2.00 ppb	OK	2022-12-31
COEUR D ALENE CITY OF	COEUR D ALENE	54,115	2.00 ppb	OK	2025-12-31
REXBURG CITY OF	REXBURG	40,462	2.00 ppb	OK	2024-12-31
CHUBBUCK CITY OF	CHUBBUCK	15,842	2.00 ppb	OK	2025-12-31

Showing top 15 of 1228 systems with lead data. Action level: 15 ppb.

Water Source Types

Groundwater4087 (95%)

Surface Water153 (4%)

Purchased Groundwater22 (1%)

Groundwater Under Influence of SW17 (0%)

Purchased Surface Water17 (0%)

Unknown14 (0%)

Purchased GW Under Influence of SW1 (0%)

Resources

EPA Water Data Reports

Official drinking water data and reports

Lead in Drinking Water

EPA guidance on lead risks and remediation

Learn About Lead Contamination

Health effects, filtering options, and more

Air Quality

Good

Avg AQI

39.6

PM2.5

8.7 µg/m³

Unhealthy Days

Primary Pollutant

Wildfire smoke (seasonal)

AQI 0 (Good)AQI 100 (Moderate)200+

Source: EPA AirNow & American Lung Association 2024 State of the Air. AQI scale: 0–50 Good · 51–100 Moderate · 101–150 Sensitive Groups · 151+ Unhealthy.

PFAS Contamination

Moderate Detection

PFAS (per- and polyfluoroalkyl substances), known as “forever chemicals,” are a group of synthetic chemicals that persist indefinitely in the environment and human body. The EPA set a maximum contaminant level (MCL) of 4 parts per trillion (ppt) for PFOA and PFOS in April 2024. View national PFAS tracker →

Systems Tested

PFAS Detected

Detection Rate

28.6%

Exceeding MCL (4 ppt)

3(3.1%)

0%Detection rate: 28.6%100%

Highest recorded level: 8 ppt (EPA MCL: 4 ppt). Mountain West; lower industrial footprint but some military-adjacent contamination

Data source:EPA Safe Drinking Water Information System (SDWIS), Lead and Copper Rule monitoring data. Lead levels represent 90th percentile results from the most recent monitoring period. Violations indicate exceedances of EPA action levels requiring corrective action. This tool is for informational purposes only and does not replace your utility's official Consumer Confidence Report.