B67/100
OKLAHOMA CITY — Water Quality Report 2026
Serving 644,000 people · Oklahoma
Water Source
Surface Water
County
—
System ID
OK1020902
Violations
9
Contaminant Test Results
EPA Violation History
No violations in the past 5 years
Full EPA compliance since 2012.
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 OKLAHOMA CITY
Is OKLAHOMA CITY water safe to drink?
OKLAHOMA CITY water receives a grade of B (67/100), which is considered good. Out of 76 contaminants tested, none exceed EPA legal limits. The water meets federal safety standards.
What contaminants has OKLAHOMA CITY detected?
76 contaminants were tested in OKLAHOMA CITY's water. No contaminants exceed EPA legal limits or health goals, indicating good water quality management.
Does OKLAHOMA CITY have any EPA violations?
Yes, OKLAHOMA CITY has 9 EPA violation(s) on record, with the most recent in 2012. Violation types include MR, TT. 6 are health-based violations.
How many people does OKLAHOMA CITY serve?
OKLAHOMA CITY serves approximately 644,000 people, Oklahoma.
What type of water does OKLAHOMA CITY provide?
OKLAHOMA CITY 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 OK1020902.
How does OKLAHOMA CITY compare to other utilities in Oklahoma?
OKLAHOMA CITY scores 67/100 with a grade of B (good). This is an above-average performance for utilities statewide. Visit our Oklahoma state page for a full comparison of water systems.