Norman Utilities Authority
Norman, Oklahoma · PWSID: OK1020801
Norman Water Quality Summary
Norman Utilities Authority supplies drinking water to about 104,868 people in Norman, Oklahoma, and draws from surface water (rivers, lakes, or reservoirs), which requires fuller treatment for runoff, sediment, and microbial risk. On the IsWaterSafe scale it earns a fair Water Safety Score of 70 out of 100 (Grade C), a composite of its EPA SDWIS violation and contaminant record.
EPA records show 1 health-based violation for this system. A health-based violation means a contaminant exceeded its legal EPA limit, the most serious category in the Safe Drinking Water Act. The system has 11 enforcement actions on file in response.
Across the single substance sampled, none exceeded its EPA limit. Atrazine sits highest relative to its ceiling, detected at 1.5 ppb against an MCL of 3 ppb (sampled January 2021) — within the legal limit.
The most recent documented episode is a health-based violation involving Atrazine, beginning January 2021 and marked resolved June 2021.
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Detected Contaminants
| Contaminant | Detected Level | MCL (Limit) | Status | Sample Date |
|---|---|---|---|---|
| Atrazine | 1.5 ppb | 3 ppb | Within Limit | Jan 1, 2021 |
Violation History
Frequently Asked Questions
Norman Utilities Authority has a Water Safety Score of C (70/100). The system serves 104,868 people and has 1 health violation on record. Check the contaminant table above for specific detected substances.
Norman Utilities Authority has 0 contaminant exceedances above EPA health guidelines. See the full contaminant detection table above for all tested substances and their levels relative to legal limits and health guidelines.
The Water Safety Score (0-100, grades A through F) is based on contaminant levels relative to legal limits, health guideline exceedances, violation history, and enforcement actions. Higher scores indicate fewer concerns.
If your water system has violations, request the Consumer Confidence Report from your utility, consider getting an independent water test from a certified lab, and look into certified water filters for specific contaminants of concern. For lead, run cold water for 30 seconds before drinking.
Water quality data sourced from EPA's Safe Drinking Water Information System (SDWIS). Safety scores are calculated based on contaminant levels, violations, and enforcement history. This is not a substitute for your utility's official Consumer Confidence Report.
Source: EPA Ground Water and Drinking Water, 2026.