Oklahoma City, OK Water Quality Report

Is Oklahoma City tap water safe? See PFAS and lead contamination levels for Oklahoma City, Oklahoma. Compare to EPA limits and get filter recommendations.

Quick Answers

Is Oklahoma City tap water safe to drink? Oklahoma City tap water meets most federal EPA limits, but PFAS compounds have been detected at an average of 40.43 ppt across 2 compounds. A certified pitcher filter or reverse osmosis system is recommended for sensitive populations.

What contaminants are in Oklahoma City water? Top PFAS compounds detected in Oklahoma City water: lithium (67.8 ppt), PFPeA (0 ppt). See the full table for all monitored contaminants and comparison to EPA limits.

What filter should I use in Oklahoma City? Reverse osmosis removes 90%+ of PFAS, lead, and arsenic. NSF-53 certified pitcher and faucet filters (ZeroWater, Clearly Filtered, LifeStraw) work for smaller households. Skip standard Brita filters for PFAS removal.

Oklahoma City Water Quality Summary

EPA testing has detected PFAS "forever chemicals" in Oklahoma City drinking water. Recent monitoring found a peak level of 67.8 ppt across 1 water system, representing an average of 40.43 ppt across 2 detected compounds.

Contamination Level: MODERATE – Moderate contamination – PFAS detected at meaningful levels; filtration recommended.

Top Detected Compounds

  • lithium: 67.8 ppt (exceeds EPA 4 ppt limit for PFOA/PFOS)
  • PFPeA: 0 ppt

Lead in Oklahoma City Water

EPA Lead and Copper Rule testing has recorded 12 lead samples for Oklahoma City water systems, with a 90th-percentile high of 0.0041 mg/L (within the EPA 0.015 mg/L action level). There is no safe level of lead for children; if your home was built before 1986, a certified NSF/ANSI 53 lead-removal filter is recommended.

EPA Violations in Oklahoma City

Oklahoma City public water systems have 33 health-based EPA Safe Drinking Water Act violations on record, including Haloacetic Acids (HAA5), Nitrate, Arsenic, Total Trihalomethanes (TTHMs), Gross Alpha (excl. radon & uranium). Health-based violations mean a contaminant exceeded its federal limit or required treatment was not applied.

About the Data

These figures come from the EPA's Unregulated Contaminant Monitoring Rule 5 (UCMR5) testing program, 2023-2025. UCMR5 is the most comprehensive national drinking water survey in US history, covering 66,000+ public water systems. Population of Oklahoma City: approximately 681,054.

ZIP Codes Served

73101, 73102, 73103, 73104, 73105

Compare Oklahoma City to Other Cities

Side-by-side PFAS contamination comparisons with same-state, regional, and national peers.

What Oklahoma City Residents Should Do

  1. Enter your exact ZIP code at knowyourexposure.com for address-level data
  2. Install an NSF/ANSI 58 reverse osmosis filter (removes 94-99% of PFAS)
  3. If you're in a high-exposure group (pregnant, young children), consider a PFAS home test kit
  4. Review your utility's Consumer Confidence Report (CCR) annually