Drinking water quality · 2024
· Verified
What's in Norman, OK tap water
22 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
- 22
- Over federal limit
- 2
- Approaching the limit
- 0
- Worst contaminant
- Arsenic
- Service area
- OK
PFAS — EPA UCMR5 (2023–2025)
3 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)below national p90 (18 ng/L across detecting U.S. systems)
Lithium
● Detected (no federal limit)below national p90 (76.59999999999991 mg/L across detecting U.S. systems)
PFBS
● Detected (no federal limit)below national p90 (13.909999999999979 ng/L across detecting U.S. systems)
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.
Historical readings · EPA Six-Year Review (2012–2019)
3 contaminants historically over EPA limits in Norman, OK
Every U.S. public water system reports compliance-monitoring data to EPA. The Six-Year Review releases the 2012–2019 window as a single dataset — here's what your system reported, year by year. Values shown are the highest detection per analyte per year, compared to the federal MCL.
| Contaminant | Worst detection | EPA limit | Years (2012–2019) |
|---|---|---|---|
GROSS BETA worst: 2013 | 16.1 mrem/yr 4.0× | 4 mrem/yr | '12'13'14'15'16'17'18'19 |
GROSS ALPHA worst: 2013 | 48.8 pCi/L 3.3× | 15 pCi/L | '12'13'14'15'16'17'18'19 |
ARSENIC worst: 2013 | 0.0304 mg/L 3.0× 2.3× the national p90 | 0.01 mg/L | '12'13'14'15'16'17'18'19 |
RADIUM 226 228 worst: 2017 | 4.93 pCi/L 99% above national p90 | 5 pCi/L | '12'13'14'15'16'17'18'19 |
CHROMIUM worst: 2017 | 0.09809999999999999 mg/L 98% 9.8× the national p90 | 0.1 mg/L | '12'14'15'16'17'18'19 |
TTHM worst: 2017 | 0.057280000000000005 mg/L within | 0.08 mg/L | '12'13'14'15'16'17'18'19 |
ANTIMONY worst: 2017 | 0.00367 mg/L within above national p90 | 0.006 mg/L | '14'15'16'17 |
BARIUM worst: 2012 | 0.894 mg/L within 4.1× the national p90 | 2 mg/L | '12'14'15'16'17'18'19 |
SELENIUM worst: 2012 | 0.0217 mg/L within | 0.05 mg/L | '12'14'15'16'17'18 |
NITRITE worst: 2016 | 0.41500000000000004 mg/L within | 1 mg/L | '14'16'17'18 |
HAA5 worst: 2013 | 0.024550000000000002 mg/L within | 0.06 mg/L | '12'13'14'15'16'17'18'19 |
SIMAZINE worst: 2019 | 0.0014 mg/L within | 0.004 mg/L | '18'19 |
FLUORIDE worst: 2014 | 1.09 mg/L within | 4 mg/L | '12'13'14'15'16'17'18'19 |
NITRATE NITRITE worst: 2017 | 2.2800000000000002 mg/L within | 10 mg/L | '12'13'14'15'16'17'18'19 |
THALLIUM worst: 2017 | 0.0004 mg/L within | 0.002 mg/L | '17 |
DEHP worst: 2019 | 0.0011 mg/L within | 0.006 mg/L | '19 |
PENTACHLOROPHENOL worst: 2018 | 0.00016 mg/L within | 0.001 mg/L | '18 |
DICHLOROMETHANE worst: 2016 | 0.00061 mg/L within | 0.005 mg/L | '16 |
NITRATE worst: 2017 | 1.05 mg/L within | 10 mg/L | '12'14'15'16'17'18 |
CYANIDE worst: 2018 | 0.0183 mg/L within below national p90 | 0.2 mg/L | '14'16'17'18 |
CADMIUM worst: 2017 | 0.000144 mg/L within below national p90 | 0.005 mg/L | '17 |
TOLUENE worst: 2013 | 0.0116 mg/L within | 1 mg/L | '13 |
TWOFOURD worst: 2018 | 0.0003 mg/L within below national p90 | 0.07 mg/L | '18'19 |
URANIUM worst: 2014 | 0.03546200000000001 ug/L within above national p90 | 30 ug/L | '12'13'14'15'16'17'18'19 |
COPPER worst: 2012 | 0.0454 mg/L below national p90 | — | '12'15'18'19 |
LEAD worst: 2012 | 0.0016200000000000001 mg/L | — | '12'15'19 |
DBAA worst: 2018 | 0.00147 mg/L | — | '18'19 |
DCAA worst: 2013 | 0.019 mg/L | — | '13'14'15'16'17'18'19 |
MCAA worst: 2018 | 0.0020299999999999997 mg/L | — | '18'19 |
TCAA worst: 2013 | 0.00555 mg/L | — | '13'18'19 |
BROMODICHLOROMETHANE worst: 2012 | 0.0032 mg/L | — | '12'15'16'17'18'19 |
CHLOROFORM worst: 2012 | 0.006 mg/L | — | '12'15'16'17'18'19 |
DIBROMOCHLOROMETHANE worst: 2012 | 0.0012 mg/L | — | '12'15'16'17'18'19 |
Metals
| Contaminant | Measured | Federal limit | Status |
|---|---|---|---|
| Chromium, TotalTotal chromium — the sum of all chromium forms, from natural deposits and industrial discharge. | 19–100 ug/LRangeSystem-wide | 100 ug/LMCL | At or above the limit |
| SodiumA naturally occurring salt component. | 30–140 mg/LRangeSystem-wide | None set | Detected — no federal limit |
Radionuclides
| Contaminant | Measured | Federal limit | Status |
|---|---|---|---|
| Combined RadiumCombined radium-226 and radium-228 — naturally occurring radioactive elements. | 1.73–3 pCi/LRangeSystem-wide | 5 pCi/LMCL | Within the limit |
Disinfection byproducts
| Contaminant | Measured | Federal limit | Status |
|---|---|---|---|
| BromateA disinfection byproduct formed when bromide-containing water is treated with ozone. | 2 ug/LMaximumSystem-wide | 10 ug/LMCL | Within the limit |
Inorganic chemicals
| Contaminant | Measured | Federal limit | Status |
|---|---|---|---|
| SulfateA naturally occurring mineral from rock and soil. | 9.6 mg/LHighest single sampleSystem-wide | 250 mg/LMCL | Within the limit |
Physical & aggregate
| Contaminant | Measured | Federal limit | Status |
|---|---|---|---|
| AlkalinityA measure of the water's capacity to neutralize acids. | 247 mg/LRangeSystem-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, Total. 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?
22 contaminants were measured in Norman, OK's 2024 Consumer Confidence Report, spanning metals, radionuclides, and disinfection byproducts. 17 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, Total (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.