F0/100
NPS-WOLVERTON — Water Quality Report 2026
Serving 2,940 people · California
Water Source
Surface Water
County
—
System ID
CA5410503
Violations
106
Contaminant Test Results
2 contaminants above EPA health goals
| Contaminant | Detected | Limit (MCL) | Status |
|---|---|---|---|
Copper (90th percentile) | 1.56 mg/L | 1.30 mg/L | Over Limit |
Lead (90th percentile) | 0.012 mg/L | 0.015 mg/L | Above Goal |
EPA Violation History
3
Violations (last 5yr)
1
Unresolved
0
Health-Related
TIER 3Unresolved
Reporting Violation
This is a paperwork/process violation — it does not mean a contaminant was detected at unsafe levels.
TIER 3Resolved
Monitoring Violation
This is a paperwork/process violation — it does not mean a contaminant was detected at unsafe levels.
When: April 1, 2024 – April 30, 2024Rule: Total Coliform RuleEnforcement: Formal — state order issued
TIER 3Resolved
Surface water treatment technique failure
When: July 1, 2022 – February 28, 2023Enforcement: Formal — state order issued
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 NPS-WOLVERTON
Is NPS-WOLVERTON water safe to drink?
NPS-WOLVERTON water receives a grade of F (0/100), which is considered failing. 1 contaminant(s) exceed EPA legal limits and 106 violation(s) are on record. Customers may want to consider using a water filter.
What contaminants has NPS-WOLVERTON detected?
2 contaminants were tested in NPS-WOLVERTON's water. Notable contaminants include Copper (90th percentile), Lead (90th percentile). 1 exceed EPA legal limits (MCLs). 2 exceed EPA health goals (MCLGs).
Does NPS-WOLVERTON have any EPA violations?
Yes, NPS-WOLVERTON has 106 EPA violation(s) on record, with the most recent in 2025. Violation types include RPT, MON, Other. 99 are health-based violations.
How many people does NPS-WOLVERTON serve?
NPS-WOLVERTON serves approximately 2,940 people, California.
What type of water does NPS-WOLVERTON provide?
NPS-WOLVERTON 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 CA5410503.
How does NPS-WOLVERTON compare to other utilities in California?
NPS-WOLVERTON scores 0/100 with a grade of F (failing). This score suggests significant water quality concerns relative to other utilities. Visit our California state page for a full comparison of water systems.