Drinking water quality · 2024
· Verified
· PWSID OK1020801
What's in Norman, OK tap water
2 contaminants in Norman, OK's water sat at or above a federal limit, led by Arsenic at 1.0x the limit.
- !2 contaminants at or above a federal limit — worst is Arsenic at 1.0x
- !13 of 27 core regulated contaminants reported — 14 never appear in this report
- ✓No open federal violations
+How this score is calculated
Every system starts at 100. Points come off for measured levels, for the federal violation record, and for how much of the core regulated set the utility actually reported. All three inputs are the utility's own published numbers and EPA's own records.
- −24 contaminants at or above a federal limit
- −0 contaminants within 20% of a limit
- −0 open health-based violations
- −0 open monitoring / reporting violations
- −2 health-based violations resolved in the last 5 years
- −9 core regulated contaminants never reported (13/27)
A 90–100 · B 80–89 · C 70–79 · D 60–69 · F below 60. A system reporting under a third of the core set is capped at C however clean its numbers look — a short report is not a clean bill of health.
Full grading methodology, constant for constant →What to worry about
+21 contaminants were measured and came in below the limitShow all
| Contaminant | Measured | Federal limit |
|---|---|---|
| Gross Alpha | 10.9 pCi/L | 15 pCi/L |
| Combined Radium | 3 pCi/L | 5 pCi/L |
| Uranium | 12.5 ug/L | 30 ug/L |
| Barium | 0.53 mg/L | 2 mg/L |
| Bromate | 2 ug/L | 10 ug/L |
| Selenium | 10 ug/L | 50 ug/L |
| Fluoride | 0.76 mg/L | 4 mg/L |
| HAA5 | 10 ug/L | 60 ug/L |
| TTHM | 12 ug/L | 80 ug/L |
| Copper | 0.179 mg/L | 1.3 mg/L |
| Nitrate Nitrite | 0.212–0.841 mg/L | 10 mg/L |
| Simazine | 0.27 ug/L | 4 ug/L |
| Nitrate | 0.598 mg/L | 10 mg/L |
| Lead | 0.00057 mg/L | 0.015 mg/L |
| Sulfate | 9.6 mg/L | — |
| Lithium | 0.000473684 ug/L | — |
| Sodium | 140 mg/L | — |
| Alkalinity | 247 mg/L | — |
| Gross Beta Particle Activity | 6.46 pCi/L | — |
| PFBA | 7.5 ng/L | — |
| PFBS | 3 ng/L | — |
What this report doesn't tell you
14 of the 27 contaminants a community water system normally reports do not appear anywhere in Norman, OK's data. Absent is not the same as absent-from-the-water — it means nobody published a number.
+Full detail: PFAS testing, water source, historical monitoring, and the federal violation record
PFAS — EPA UCMR5 (2023–2025)
2 PFAS compounds detected in Norman, OK
The EPA finalized the first-ever federal drinking-water limits for six PFAS compounds in April 2024. These numbers come straight from EPA's UCMR5 lab dataset — every U.S. system serving more than 3,300 people tested every PFAS sample at an entry point to its distribution system. PFAS not listed below were either tested and not detected, or not yet sampled.
PFBA
● Detected (no federal limit)PFBS
● Detected (no federal limit)Where your water comes from · EPA SDWIS
Norman, OK's drinking water comes from ground water, drawn from 44 sources.
Source
- WELL · 34
- THUNDERBIRD LK
- WELL 64 SIMPSON
- WELL 68 MEYER
- + 7 more
Treatment
- NORMAN WTP
- CL2 STATION WELL #57
- ION EXCHANGE AT WELL 31
Distribution
Also buys water from OKLAHOMA CITY.
Compliance history
Federal Safe Drinking Water Act violation & enforcement records (EPA SDWIS). A violation is a regulatory determination by the state or EPA — separate from the measured levels above.
- Maximum contaminant level exceededHealth-based17 violations on record · most recent Apr 2014resolved
- Treatment technique violationHealth-based2 violations on record · most recent Oct 2024resolved
Source: EPA SDWIS / ECHO. View the full federal record on EPA ECHO ↗