Drinking water quality · 2024
· Verified
What's in Oklahoma City, OK tap water
13 contaminants were measured in the Oklahoma City, OK water system's 2024 annual report. Each is shown below against its federal limit.
- Reporting year
- 2024
- Contaminants measured
- 13
- Over federal limit
- 0
- Approaching the limit
- 1
- Service area
- OK
PFAS — EPA UCMR5 (2023–2025)
2 PFAS compounds detected in Oklahoma City, 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.
Lithium
● Detected (no federal limit)near national p90 (76.59999999999991 mg/L across detecting U.S. systems)
PFPeA
● Detected (no federal limit)below national p90 (15.95999999999999 ng/L across detecting U.S. systems)
Where your water comes from · EPA SDWIS
Oklahoma City, OK's drinking water comes from surface water, drawn from 3 sources.
Source
- LAKE HEFNER
- LAKE ATOKA
- DRAPER LK
Treatment
- OKC HEFNER WTP
- OKC DRAPER WTP
Distribution
Historical readings · EPA Six-Year Review (2012–2019)
4 contaminants historically over EPA limits in Oklahoma City, 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) |
|---|---|---|---|
BROMATE worst: 2016 | 0.0405 mg/L 4.0× | 0.01 mg/L | '12'15'16'17'19 |
GROSS BETA worst: 2017 | 8.78 mrem/yr 2.2× | 4 mrem/yr | '12'17'18 |
TTHM worst: 2012 | 0.0859 mg/L 1.1× | 0.08 mg/L | '12'13'14'15'16'17'18'19 |
HAA5 worst: 2015 | 0.0639 mg/L 1.1× | 0.06 mg/L | '12'13'14'15'16'17'18'19 |
DEHP worst: 2019 | 0.00259 mg/L within | 0.006 mg/L | '19 |
FLUORIDE worst: 2013 | 0.85 mg/L within | 4 mg/L | '13 |
NITRITE worst: 2012 | 0.071 mg/L within | 1 mg/L | '12'13'14'15'16 |
NITRATE NITRITE worst: 2015 | 0.691 mg/L within | 10 mg/L | '12'13'14'15'16'17'18'19 |
NITRATE worst: 2019 | 0.687 mg/L within | 10 mg/L | '12'13'14'15'16'17'18'19 |
BARIUM worst: 2013 | 0.0567 mg/L within below national p90 | 2 mg/L | '13 |
COPPER worst: 2012 | 0.158 mg/L below national p90 | — | '12'15'17'18'19 |
LEAD worst: 2012 | 0.0168 mg/L | — | '12'17'18'19 |
DBAA worst: 2012 | 0.0022 mg/L | — | '12'13'14'15'16'17'18'19 |
DCAA worst: 2012 | 0.0136 mg/L | — | '12'13'14'15'16'17'18'19 |
MBAA worst: 2012 | 0.00167 mg/L | — | '12'13'16'17'18 |
MCAA worst: 2013 | 0.00283 mg/L | — | '13'14'15'16'17'18'19 |
TCAA worst: 2012 | 0.00796 mg/L | — | '12'13'14'15'16'17'18'19 |
BROMODICHLOROMETHANE worst: 2012 | 0.0145 mg/L | — | '12'13'14'15'16'17'18'19 |
BROMOFORM worst: 2014 | 0.00206 mg/L | — | '14'15'16'17'18'19 |
CHLOROFORM worst: 2012 | 0.0288 mg/L | — | '12'13'14'15'16'17'18'19 |
DIBROMOCHLOROMETHANE worst: 2012 | 0.00645 mg/L | — | '12'13'14'15'16'17'18'19 |
Radionuclides
| Contaminant | Measured | Federal limit | Status |
|---|---|---|---|
| Combined RadiumCombined radium-226 and radium-228 — naturally occurring radioactive elements. | 3 pCi/LMaximumSystem-wide | 5 pCi/LMCL | Within the limit |
| Gross AlphaGross alpha particle activity — a combined measure of alpha-emitting radioactive substances. | 2.14 pCi/LMaximumSystem-wide | 15 pCi/LMCL | Within the limit |
Microbial
| Contaminant | Measured | Federal limit | Status |
|---|---|---|---|
| Total ColiformA group of bacteria used as an indicator of overall water-system sanitation. | 2.08Reported levelSystem-wide | None set | Detected — no federal limit |
People also ask about Oklahoma City, OK's water
+Is Oklahoma City, OK tap water safe to drink in 2024?
Every one of the 13 contaminants measured in Oklahoma City, OK's 2024 Consumer Confidence Report is below its federal limit. "Safe" under the EPA's drinking-water standards is health-based, not aesthetic — but by those standards, no measured contaminant in this report exceeds its enforceable threshold. Individual health concerns (e.g. immunocompromised, infant, pregnancy) may warrant additional filtering regardless of compliance.
+What contaminants are in Oklahoma City, OK tap water?
13 contaminants were measured in Oklahoma City, OK's 2024 Consumer Confidence Report, spanning metals, radionuclides, and disinfection byproducts. 10 have an enforceable federal limit; the rest are detected but unregulated. Every measured value, in the utility's own units, is on this page.
+Are any contaminants in Oklahoma City, OK tap water approaching the federal limit?
One contaminant is between 80% and 100% of the federal limit in this report: TTHM. Approaching means measured but not in violation — a margin that can close quickly if conditions change.
+Where does the data on this page come from?
Every value is transcribed from Oklahoma City, 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 Oklahoma City, 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.