A92/100
GOLDEN STATE WATER CO.-CLEARLAKE SYSTEM — Water Quality Report 2026
Serving 4,644 people · California
Water Source
Surface Water
County
—
System ID
CA1710002
Violations
1
Contaminant Test Results
1 contaminant above EPA health goals
| Contaminant | Detected | Limit (MCL) | Status |
|---|---|---|---|
Lead (90th percentile) | 0.004 mg/L | 0.015 mg/L | Above Goal |
EPA Violation History
No violations in the past 5 years
Full EPA compliance since 1994.
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 GOLDEN STATE WATER CO.-CLEARLAKE SYSTEM
Is GOLDEN STATE WATER CO.-CLEARLAKE SYSTEM water safe to drink?
GOLDEN STATE WATER CO.-CLEARLAKE SYSTEM water receives a grade of A (92/100), which is considered excellent. Out of 31 contaminants tested, none exceed EPA legal limits. 1 contaminant(s) exceed non-enforceable health goals. The water meets federal safety standards.
What contaminants has GOLDEN STATE WATER CO.-CLEARLAKE SYSTEM detected?
31 contaminants were tested in GOLDEN STATE WATER CO.-CLEARLAKE SYSTEM's water. Notable contaminants include Lead (90th percentile). No contaminants exceed EPA legal limits. 1 exceed EPA health goals (MCLGs).
Does GOLDEN STATE WATER CO.-CLEARLAKE SYSTEM have any EPA violations?
Yes, GOLDEN STATE WATER CO.-CLEARLAKE SYSTEM has 1 EPA violation(s) on record, with the most recent in 1994. Violation types include MCL. 1 are health-based violations.
How many people does GOLDEN STATE WATER CO.-CLEARLAKE SYSTEM serve?
GOLDEN STATE WATER CO.-CLEARLAKE SYSTEM serves approximately 4,644 people, California.
What type of water does GOLDEN STATE WATER CO.-CLEARLAKE SYSTEM provide?
GOLDEN STATE WATER CO.-CLEARLAKE SYSTEM 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 CA1710002.
How does GOLDEN STATE WATER CO.-CLEARLAKE SYSTEM compare to other utilities in California?
GOLDEN STATE WATER CO.-CLEARLAKE SYSTEM scores 92/100 with a grade of A (excellent). This places it among the higher-performing utilities in the state. Visit our California state page for a full comparison of water systems.