Is OKLAHOMA CITY's water safe to drink?
OKLAHOMA CITY has a health-based violation on record, but none in the last five years - an older issue, not necessarily a current one. It serves 644,000 people through 254,388 service connections.
OKLAHOMA CITY's record against the rest of the country
10 total violations and 6 health-based ones put OKLAHOMA CITY at the 75th percentile nationally for violation burden, rank 3,251 of 12,903.
How OKLAHOMA CITY compares within OK
Among the 240 OK systems in this dataset, the average is 39.5 health-based violations - OKLAHOMA CITY's 6 is at or below that. The clean-record guide covers what a comparison like this can hide.
Most recent violation on record
The last violation EPA has on record for OKLAHOMA CITY is from 2012-01-07 (health-based: 2012-01-01). Last reported to EPA: 05/13/2026.
What kind of problem, specifically
OKLAHOMA CITY's flagged contaminants and rule violations, grouped by what they actually mean for a filter choice rather than left as EPA's raw code list:
- Microbial contamination / treatment technique - flagged from: Interim Enhanced Surface Water Treatment Rule; Surface Water Treatment Rule
- Synthetic organic chemicals / pesticides / VOCs - flagged from: CARBON, TOTAL
The most severe category on record is microbial contamination / treatment technique, which points toward a microbial-class filter if you want to address it directly.
What this data is and is not
Everything on this page is OKLAHOMA CITY's own reported record under the Safe Drinking Water Act - a regulatory filing, not a sample of your tap. Water quality can still change between the meter and the faucet - household plumbing sits outside what a record of 10 logged violations can see. The guide to what this data misses covers that gap.