F0/100
EAST NILES CSD — Water Quality Report 2026
Serving 32,517 people · California
Water Source
Purchased Surface Water
County
—
System ID
CA1510006
Violations
23
Contaminant Test Results
1 contaminant above EPA health goals
| Contaminant | Detected | Limit (MCL) | Status |
|---|---|---|---|
Lead (90th percentile) | 0.001 mg/L | 0.015 mg/L | Above Goal |
EPA Violation History
4
Violations (last 5yr)
2
Unresolved
3
Health-Related
TIER 2Unresolved
Treatment technique violation
TIER 3Unresolved
Reporting violation
This is a paperwork/process violation — it does not mean a contaminant was detected at unsafe levels.
TIER 2Resolved
Exceeded the Maximum Contaminant Level (running average)
When: January 1, 2024 – March 31, 2024Rule: Stage 2 DBPREnforcement: Formal — state order issued
TIER 2Resolved
Exceeded the Maximum Contaminant Level (running average)
When: October 1, 2023 – December 31, 2023Rule: Stage 2 DBPREnforcement: 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 EAST NILES CSD
Is EAST NILES CSD water safe to drink?
EAST NILES CSD water receives a grade of F (0/100), which is considered failing. 0 contaminant(s) exceed EPA legal limits and 23 violation(s) are on record. Customers may want to consider using a water filter.
What contaminants has EAST NILES CSD detected?
69 contaminants were tested in EAST NILES CSD's water. Notable contaminants include Lead (90th percentile). No contaminants exceed EPA legal limits. 1 exceed EPA health goals (MCLGs).
Does EAST NILES CSD have any EPA violations?
Yes, EAST NILES CSD has 23 EPA violation(s) on record, with the most recent in 2024. Violation types include TT, RPT, MCL. 22 are health-based violations.
How many people does EAST NILES CSD serve?
EAST NILES CSD serves approximately 32,517 people, California.
What type of water does EAST NILES CSD provide?
EAST NILES CSD sources its water from purchased surface water. Surface water comes from rivers, lakes, or reservoirs and typically requires more extensive treatment. The utility's system ID is CA1510006.
How does EAST NILES CSD compare to other utilities in California?
EAST NILES CSD 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.