A90/100
SUBURBAN WATER SYSTEMS-COVINA KNOLLS — Water Quality Report 2026
Serving 1,437 people · California
Water Source
Purchased Surface Water
County
—
System ID
CA1910200
Violations
2
Contaminant Test Results
EPA Violation History
No violations in the past 5 years
Full EPA compliance since 1996.
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 SUBURBAN WATER SYSTEMS-COVINA KNOLLS
Is SUBURBAN WATER SYSTEMS-COVINA KNOLLS water safe to drink?
SUBURBAN WATER SYSTEMS-COVINA KNOLLS water receives a grade of A (90/100), which is considered excellent. Out of 1 contaminants tested, none exceed EPA legal limits. The water meets federal safety standards.
What contaminants has SUBURBAN WATER SYSTEMS-COVINA KNOLLS detected?
1 contaminants were tested in SUBURBAN WATER SYSTEMS-COVINA KNOLLS's water. No contaminants exceed EPA legal limits or health goals, indicating good water quality management.
Does SUBURBAN WATER SYSTEMS-COVINA KNOLLS have any EPA violations?
Yes, SUBURBAN WATER SYSTEMS-COVINA KNOLLS has 2 EPA violation(s) on record, with the most recent in 1996. Violation types include MCL, TT. 2 are health-based violations.
How many people does SUBURBAN WATER SYSTEMS-COVINA KNOLLS serve?
SUBURBAN WATER SYSTEMS-COVINA KNOLLS serves approximately 1,437 people, California.
What type of water does SUBURBAN WATER SYSTEMS-COVINA KNOLLS provide?
SUBURBAN WATER SYSTEMS-COVINA KNOLLS 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 CA1910200.
How does SUBURBAN WATER SYSTEMS-COVINA KNOLLS compare to other utilities in California?
SUBURBAN WATER SYSTEMS-COVINA KNOLLS scores 90/100 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.