C58/100
PASCO WATER DEPARTMENT — Water Quality Report 2026
Serving 116,342 people · Washington
Water Source
Surface Water
County
—
System ID
WA5366400
Violations
28
Contaminant Test Results
2 contaminants above EPA health goals
| Contaminant | Detected | Limit (MCL) | Status |
|---|---|---|---|
chlorate | 309.00 µg/L | — | Above Goal |
Lead (90th percentile) | 0.002 mg/L | 0.015 mg/L | Above Goal |
EPA Violation History
No violations in the past 5 years
Full EPA compliance since 2017.
Understanding violation severity
Tier 1Urgent health risk. Utility must notify all customers within 24 hours.Tier 2Important health or treatment issue. Customers notified within 30 days.Tier 3Administrative or monitoring issue. Reported in the annual water quality report.
Source: EPA Safe Drinking Water Information System (SDWIS) · Updated quarterly
Frequently Asked Questions About PASCO WATER DEPARTMENT
Is PASCO WATER DEPARTMENT water safe to drink?
PASCO WATER DEPARTMENT water receives a grade of C (58/100), which is considered fair. 0 contaminant(s) exceed EPA legal limits and 28 violation(s) are on record. Customers may want to consider using a water filter.
What contaminants has PASCO WATER DEPARTMENT detected?
69 contaminants were tested in PASCO WATER DEPARTMENT's water. Notable contaminants include Lead (90th percentile), chlorate. No contaminants exceed EPA legal limits. 2 exceed EPA health goals (MCLGs).
Does PASCO WATER DEPARTMENT have any EPA violations?
Yes, PASCO WATER DEPARTMENT has 28 EPA violation(s) on record, with the most recent in 2017. Violation types include MR, Other, MCL. 2 are health-based violations.
How many people does PASCO WATER DEPARTMENT serve?
PASCO WATER DEPARTMENT serves approximately 116,342 people, Washington.
What type of water does PASCO WATER DEPARTMENT provide?
PASCO WATER DEPARTMENT sources its water from surface water. Surface water comes from rivers, lakes, or reservoirs and typically requires more extensive treatment. The utility's system ID is WA5366400.
How does PASCO WATER DEPARTMENT compare to other utilities in Washington?
PASCO WATER DEPARTMENT scores 58/100 with a grade of C (fair). This score indicates room for improvement compared to other utilities. Visit our Washington state page for a full comparison of water systems.