Drinking water quality · 2024
· Verified
What's in Norman, OK tap water
23 contaminants were measured in the Norman, OK water system's 2024 annual report. Each is shown below against its federal limit — 2 sit at or above that limit.
- Reporting year
- 2024
- Contaminants measured
- 23
- Over federal limit
- 2
- Approaching the limit
- 0
- Worst contaminant
- Arsenic
- Service area
- OK
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 ↗
Metals
| Contaminant | Measured | Federal limit | Status |
|---|---|---|---|
| ArsenicA naturally occurring element that also enters water from industry and agriculture. | 10 ug/LMaximumSystem-wide | None set | At or above the limit |
| BariumA metal from erosion of natural deposits and industrial discharge. | 0.53 mg/LMaximumSystem-wide | 2 mg/LMCL | Within the limit |
| SeleniumA trace element from natural deposits and industrial discharge. | 10 ug/LMaximumSystem-wide | None set | Within the limit |
| CopperA metal that enters water from corroding household plumbing. | 0.179 mg/L90th percentileAt the tap | 1.3 mg/LAction level | Within the limit |
| LeadA toxic metal that leaches into water from old service lines, solder, and plumbing fixtures. | 0.00057 mg/L90th percentileAt the tap | 0.015 mg/LAction level | Within the limit |
| LithiumA naturally occurring element found in some groundwater. | 0.000473684 ug/LAverageof Results | None set | Detected — no federal limit |
| SodiumA naturally occurring salt component. | 140 mg/LMaximumSystem-wide | None set | Detected — no federal limit |
Other
| Contaminant | Measured | Federal limit | Status |
|---|---|---|---|
| Chromium | 100 ug/LMaximumSystem-wide | None set | At or above the limit |
| Nitrate Nitrite | 0.212–0.841 mg/LRangeSystem-wide | 10 mg/LMCL | Within the limit |
Radionuclides
| Contaminant | Measured | Federal limit | Status |
|---|---|---|---|
| Gross AlphaGross alpha particle activity — a combined measure of alpha-emitting radioactive substances. | 10.9 pCi/LHighest single sampleSystem-wide | 15 pCi/LMCL | Within the limit |
| Combined RadiumCombined radium-226 and radium-228 — naturally occurring radioactive elements. | 3 pCi/LMaximumSystem-wide | 5 pCi/LMCL | Within the limit |
| UraniumA naturally occurring radioactive metal from erosion of natural deposits. | 12.5 ug/LHighest single sampleSystem-wide | 30 ug/LMCL | Within the limit |
| Gross Beta Particle ActivityGross beta particle activity — a combined measure of beta-emitting radioactive substances. | 6.46 pCi/LHighest single sampleSystem-wide | None set | Detected — no federal limit |
Disinfection byproducts
| Contaminant | Measured | Federal limit | Status |
|---|---|---|---|
| BromateA disinfection byproduct formed when bromide-containing water is treated with ozone. | 2 ug/LMaximumSystem-wide | None set | Within the limit |
| HAA5Haloacetic acids — a group of five disinfection byproducts formed when disinfectants react with organic matter. | 10 ug/LRunning annual avgSystem-wide | None set | Within the limit |
| TTHMTotal trihalomethanes — a group of four chemicals (including chloroform) formed when chlorine reacts with natural organic matter. | 12 ug/LRunning annual avgSystem-wide | None set | Within the limit |
Inorganic chemicals
| Contaminant | Measured | Federal limit | Status |
|---|---|---|---|
| FluorideA mineral often added to drinking water to help prevent tooth decay. | 0.76 mg/LMaximumSystem-wide | 4 mg/LMCL | Within the limit |
| NitrateA compound from fertilizer runoff, septic systems, and erosion of natural deposits. | 0.598 mg/LMaximumSystem-wide | 10 mg/LMCL | Within the limit |
| SulfateA naturally occurring mineral from rock and soil. | 9.6 mg/LMaximumSystem-wide | None set | Detected — no federal limit |
VOCs & pesticides
| Contaminant | Measured | Federal limit | Status |
|---|---|---|---|
| Simazine | 0.27 ug/LMaximumSystem-wide | None set | Within the limit |
Physical & aggregate
| Contaminant | Measured | Federal limit | Status |
|---|---|---|---|
| AlkalinityA measure of the water's capacity to neutralize acids. | 247 mg/LMaximumSystem-wide | None set | Detected — no federal limit |
People also ask about Norman, OK's water
+Is Norman, OK tap water safe to drink in 2024?
The 2024 Consumer Confidence Report for the Norman, OK water utility lists 2 contaminants at or above the federal limit: Arsenic and Chromium. Whether that means the water is "unsafe" depends on which contaminant, how long the exposure, and individual health factors. The table on this page shows the measured value, the federal threshold, and the regulated statistic used for compliance.
+What contaminants are in Norman, OK tap water?
23 contaminants were measured in Norman, OK's 2024 Consumer Confidence Report, spanning metals, radionuclides, and disinfection byproducts. 9 have an enforceable federal limit; the rest are detected but unregulated. Every measured value, in the utility's own units, is on this page.
+Which contaminants exceed federal limits in Norman, OK tap water?
2 contaminants in Norman, OK's 2024 report sit at or above the federal limit: Arsenic (1.0× the limit); Chromium (1.0× the limit). The EPA enforces these limits against the regulated reporting statistic — typically a running annual average or 90th percentile — not a one-off sample spike.
+What is the worst contaminant in Norman, OK tap water?
The contaminant with the highest measured value relative to its federal limit in the 2024 report is Arsenic, at 1.0× the federal threshold. It belongs to the metals family of contaminants.
+Where does the data on this page come from?
Every value is transcribed from Norman, OK's 2024 Consumer Confidence Report — the annual drinking-water report every U.S. public water utility is required by federal law to publish. The original source document is archived and viewable on this site. A water-quality report covers an entire service area, not a single address.
+How often is Norman, OK's water quality data updated?
Each U.S. public water utility publishes one Consumer Confidence Report per year, covering the prior calendar year's measurements. This page reflects the 2024 report; a new report will replace it once the utility publishes its next annual update.