A92/100
WALNUT PARK MUTUAL WATER CO. — Water Quality Report 2026
Serving 16,180 people · California
Water Source
Groundwater
County
—
System ID
CA1910169
Violations
4
Contaminant Test Results
EPA Violation History
1
Violation (last 5yr)
0
Unresolved
0
Health-Related
TIER 3Resolved
Other violation
When: June 1, 2023 – March 14, 2024Rule: Revised Total Coliform 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 WALNUT PARK MUTUAL WATER CO.
Is WALNUT PARK MUTUAL WATER CO. water safe to drink?
WALNUT PARK MUTUAL WATER CO. water receives a grade of A (92/100), which is considered excellent. Out of 66 contaminants tested, none exceed EPA legal limits. The water meets federal safety standards.
What contaminants has WALNUT PARK MUTUAL WATER CO. detected?
66 contaminants were tested in WALNUT PARK MUTUAL WATER CO.'s water. No contaminants exceed EPA legal limits or health goals, indicating good water quality management.
Does WALNUT PARK MUTUAL WATER CO. have any EPA violations?
Yes, WALNUT PARK MUTUAL WATER CO. has 4 EPA violation(s) on record, with the most recent in 2023. Violation types include Other, MR, MON. 1 are health-based violations.
How many people does WALNUT PARK MUTUAL WATER CO. serve?
WALNUT PARK MUTUAL WATER CO. serves approximately 16,180 people, California.
What type of water does WALNUT PARK MUTUAL WATER CO. provide?
WALNUT PARK MUTUAL WATER CO. sources its water from groundwater. Groundwater is pumped from underground aquifers, which often provides natural filtration. The utility's system ID is CA1910169.
How does WALNUT PARK MUTUAL WATER CO. compare to other utilities in California?
WALNUT PARK MUTUAL WATER CO. 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.