C58/100
SIGNAL HILL - CITY, WATER DEPT. — Water Quality Report 2026
Serving 11,848 people · California
Water Source
Purchased Surface Water
County
—
System ID
CA1910149
Violations
12
Contaminant Test Results
2 contaminants above EPA health goals
| Contaminant | Detected | Limit (MCL) | Status |
|---|---|---|---|
chlorate | 510.00 µg/L | — | Above Goal |
Lead (90th percentile) | 0.003 mg/L | 0.015 mg/L | Above Goal |
EPA Violation History
7
Violations (last 5yr)
0
Unresolved
5
Health-Related
TIER 2Resolved
Failed treatment technique requirements
When: April 1, 2025 – April 30, 2025Rule: Surface Water Treatment RuleEnforcement: Formal — state order issued
TIER 2Resolved
Failed treatment technique requirements
When: March 1, 2025 – March 31, 2025Rule: Surface Water Treatment RuleEnforcement: Formal — state order issued
TIER 2Resolved
Failed treatment technique requirements
When: February 1, 2025 – February 28, 2025Rule: Surface Water Treatment RuleEnforcement: Formal — state order issued
TIER 3Resolved
Surface water treatment technique failure
When: July 1, 2023Enforcement: Formal — state order issued
TIER 3Resolved
Failed to issue ongoing public notification
This is a paperwork/process violation — it does not mean a contaminant was detected at unsafe levels.
When: June 1, 2023Rule: Ground Water RuleEnforcement: Formal — state order issued
TIER 2Resolved
Failed treatment technique requirements
When: May 1, 2022 – May 31, 2022Rule: Surface Water Treatment RuleEnforcement: Formal — state order issued
TIER 2Resolved
Failed treatment technique requirements
When: March 1, 2022 – March 31, 2022Rule: Surface Water Treatment RuleEnforcement: 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 SIGNAL HILL - CITY, WATER DEPT.
Is SIGNAL HILL - CITY, WATER DEPT. water safe to drink?
SIGNAL HILL - CITY, WATER DEPT. water receives a grade of C (58/100), which is considered fair. 0 contaminant(s) exceed EPA legal limits and 12 violation(s) are on record. Customers may want to consider using a water filter.
What contaminants has SIGNAL HILL - CITY, WATER DEPT. detected?
69 contaminants were tested in SIGNAL HILL - CITY, WATER DEPT.'s water. Notable contaminants include Lead (90th percentile), chlorate. No contaminants exceed EPA legal limits. 2 exceed EPA health goals (MCLGs).
Does SIGNAL HILL - CITY, WATER DEPT. have any EPA violations?
Yes, SIGNAL HILL - CITY, WATER DEPT. has 12 EPA violation(s) on record, with the most recent in 2025. Violation types include TT, Other, MR. 6 are health-based violations.
How many people does SIGNAL HILL - CITY, WATER DEPT. serve?
SIGNAL HILL - CITY, WATER DEPT. serves approximately 11,848 people, California. The system provides water to 1 community: Signal Hill.
What type of water does SIGNAL HILL - CITY, WATER DEPT. provide?
SIGNAL HILL - CITY, WATER DEPT. 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 CA1910149.
How does SIGNAL HILL - CITY, WATER DEPT. compare to other utilities in California?
SIGNAL HILL - CITY, WATER DEPT. scores 58/100 with a grade of C (fair). This score indicates room for improvement compared to other utilities. Visit our California state page for a full comparison of water systems.