Is Oklahoma City, OK tap water safe?
Supplied by Oklahoma City Utilities · serves 644,000 people (254,388 connections) · Surface water · EPA ID OK1020902
Data: U.S. EPA · How we read the data · How we check it
Most of Oklahoma City gets its water from Oklahoma City Utilities. Parts of the city are served by 3 smaller systems: Tinker Air Force Base Water System (24,645 people), Bryan County Rws & Swmd #2 (6,270 people), Okla Christian University Water System (1,800 people). Your water bill names your system.
Buys water from Edmond Public Works Authority. Treated water bought from another system can carry that system's contaminants.
Summary
No federal limits exceeded in EPA data.
- PFAS
- Detected, below limit1 of 29 PFAS found at least once. All averages below the federal limits.
- Lithium
- Above screening levelHighest result 67.8 ppb. EPA uses 10 ppb to decide what to study further. It is not a health limit, and there is no federal limit for lithium. About 1 in 4 systems tested were above it.
- Lead
- Below action level0 ppb (parts per billion) at the 90th percentile: 9 in 10 homes sampled were at or below it. Action level 15 ppb, falling to 10 ppb in Nov 2027. Monitoring period ending Dec 2025. Your home's pipes can make yours higher.
- Violations
- None health-basedNo health-based violations since 2016.
- Built before 1986, or not sure what your service line is made of? Check your service line and test your tap. Utility data can't show your pipes.
- Tested your own tap? Compare your result with these numbers. Moving? Compare this system with another.
- Read Oklahoma City Utilities's water quality report (Consumer Confidence Report, from the utility). It lists every regulated contaminant tested, including ones not on this page. Questions: (405) 297-3731.
PFAS (“forever chemicals”)
EPA UCMR 5: 2 entry points tested Jan 2024 to Oct 2024. "Average" is the highest entry-point average (non-detects counted as zero), the way EPA compares UCMR 5 results to the limits. ppt = parts per trillion. These results do not determine compliance.
| Contaminant | Highest average |
|---|---|
| PFOA Not detected Limit 4 ppt | – |
| PFOS Not detected Limit 4 ppt | – |
| PFHxS Not detected Limit 10 ppt | – |
| PFNA Not detected Limit 10 ppt | – |
| HFPO-DA (GenX) Not detected Limit 10 ppt | – |
| Hazard Index (a combined score for PFHxS, PFNA, GenX and PFBS, where above 1 is over the limit) Not detected Limit 1 | – |
| PFBS Not detected Guideline 2,000 ppt | – |
| PFBA Not detected Guideline 6,000 ppt | – |
| PFHxA Not detected Guideline 3,000 ppt | – |
| PFPeA Detected, no limit | 2.77 ppt |
29 PFAS tested, 1 detected at least once. "Not detected" means below EPA's reporting limit (about 2 to 20 ppt depending on the chemical), not proven zero. PFAS not listed were not detected. The limits for PFHxS, PFNA, GenX and the Hazard Index were proposed for rescission in May 2026. That proposal is not final. Systems have until 2029 to meet the limits.
Lithium
Detected in 5 of 8 samples. Highest result 67.8 ppb. EPA's non-enforceable screening level is 10 ppb. Above screening level The screening level is how EPA decides what to study further, not a health limit. There is no federal limit for lithium and no filter is certified to remove it. About lithium.
Lead and copper
Latest 90th percentile: 0 ppb lead (Jan 2025 – Dec 2025). Below action level
Highest since 2016: 4.1 ppb (Dec 2024).
| Monitoring period | Lead (90th pct.) |
|---|---|
| Jan 2025 – Dec 2025 | 0 ppb |
| Jan 2024 – Dec 2024 | 4.1 ppb |
| Jan 2023 – Dec 2023 | 0 ppb |
Earlier results (9)
| Jan 2022 – Dec 2022 | 0 ppb |
| Jan 2021 – Dec 2021 | 1.42 ppb |
| Jan 2020 – Dec 2020 | 0.6 ppb |
| Jan 2019 – Dec 2019 | 2.84 ppb |
| Jan 2018 – Dec 2018 | 0 ppb |
| Jan 2017 – Dec 2017 | 0 ppb |
| Jan 2013 – Dec 2015 | 0 ppb |
| Jan 2010 – Dec 2012 | 0 ppb |
| Jan 2007 – Dec 2009 | 0 ppb |
Lead service lines: Oklahoma City Utilities's inventory lists 413 lead, 0 galvanized lines that need replacing, 1,902 of unknown material out of 260,393 service lines (as of 2026-11-14). Counted by us from the utility's or state's published line-by-line inventory data.
Look up your address · Source (the utility, collected by us on Nov 14, 2026, not EPA data) · Checking your own line
Lead comes from pipes and fixtures, not the source water, so it varies home to home. The 90th percentile means 9 in 10 sampled homes were at or below it. More on lead.
Violations
Health-based violations mean a contaminant exceeded a limit or a required treatment step was missed. Monitoring and reporting violations mean required tests or reports were late or missing, so the water's quality during that time is unknown. The total includes every violation in EPA's records, most of them paperwork.
Earlier EPA testing (2013–2020)
| Contaminant | Highest | Guideline |
|---|---|---|
| Manganese | 4.32 ppb | 300 ppb |
| Vanadium | 9.46 ppb | 21 ppb |
| Strontium | 0.87 ppm | 1.5 ppm |
| Chromium-6 | 0.39 ppb | – |
| Molybdenum | 7.89 ppb | 40 ppb |
Where it serves
Oklahoma City
91 ZIP codes the system reported serving
72121, 73003, 73008, 73009, 73012, 73013, 73014, 73032, 73034, 73036, 73049, 73054, 73062, 73064, 73065, 73068, 73069, 73070, 73071, 73078, 73079, 73083, 73084, 73089, 73093, 73097, 73099, 73100, 73101, 73102, 73103, 73104, 73105, 73106, 73107, 73108, 73109, 73110, 73111, 73112, 73114, 73115, 73116, 73117, 73118, 73119, 73120, 73121, 73122, 73126, 73127, 73128, 73129, 73130, 73131, 73132, 73134, 73135, 73136, 73137, 73139, 73141, 73142, 73143, 73144, 73145, 73148, 73149, 73150, 73151, 73154, 73157, 73159, 73160, 73162, 73164, 73165, 73167, 73169, 73170, 73172, 73173, 73179, 73189, 73270, 73835, 74074, 74119, 74142, 78473, 79099
Nearby utilities
- Midwest City Water System Midwest City · 8 mi
- Moore Public Works Authority Moore · 10 mi
- Edmond Public Works Authority Edmond · 15 mi
- Norman Utilities Authority Norman · 18 mi
- Tri-County Rural Water District #2 Shawnee · 34 mi · PFAS above limit
- Stillwater Utilities Authority Stillwater · 52 mi · PFAS above limit
Questions
Is Oklahoma City tap water safe to drink?
Most of Oklahoma City gets its water from Oklahoma City Utilities. Oklahoma City Utilities has no health-based violations since 2016. EPA testing found no PFAS above the federal limits. Federal data can't tell you about your own pipes: lead comes from service lines and plumbing, so test your tap if your home was built before 1986. For the official word, read the utility's annual Consumer Confidence Report.
Does Oklahoma City water have PFAS?
Yes. EPA's 2023–2025 testing of Oklahoma City Utilities found 1 PFAS at least once. None of the averages were above the federal limits.
What is the lead level in Oklahoma City water?
The most recent 90th-percentile lead result for Oklahoma City Utilities is 0 ppb, for the period ending Dec 2025. The federal action level is 15 ppb, falling to 10 ppb in November 2027. The 90th percentile means 9 in 10 homes sampled were at or below this number. Individual homes can be higher.
Check these numbers yourself
Every figure on this page comes from public EPA records. You don't have to take our word for it:
- EPA's own report for OK1020902: violations, enforcement and inspections, straight from EPA.
- EPA UCMR 5 data: the PFAS and lithium results (search the file for PWSID OK1020902).
- EPA SDWIS download: the lead results, population and violation records we use.
- Oklahoma City Utilities's water quality report: the utility's own annual report, including contaminants EPA's national database doesn't carry (link checked Nov 14, 2026). Phone: (405) 297-3731.
- Oklahoma City Utilities website
Found something that doesn't match? Tell us and we'll check it against EPA's records. How we check our data.
Source: U.S. EPA drinking water records and PFAS testing (UCMR 5). How we read the data.