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Not health advice. Contact your local water utility for concerns.
Data from EPA Water Quality Reports. For official information, contact your water utility or health department.
Contaminants with real EPA measurements for Oklahoma water systems — lead (LCR 90th percentile), PFAS (UCMR5 2023–2026) and 2012–2019 compliance samples
These contaminants have a real EPA measurement above 50% of the federal limit in one or more Oklahoma water systems (lead: latest 90th percentile; PFAS: UCMR5 maximum; others: 2012–2019 averages).
Browse all contaminants tracked in Oklahoma water supplies. Click any contaminant to see which cities are affected.
Brain damage in children, developmental delays, high blood pressure, kidney damage
Increased cancer risk (skin, bladder, lung), skin damage, cardiovascular disease, diabetes
Thyroid disease, increased cholesterol, immune system effects, increased cancer risk
Blue baby syndrome in infants, pregnancy complications, potential cancer risk
Potential carcinogen, liver and kidney damage, gastrointestinal effects
Dental fluorosis (tooth discoloration), skeletal problems at high levels, potential thyroid effects
No detections reported
Eye and nose irritation, unpleasant taste, formation of disinfection byproducts
Gastrointestinal distress, liver and kidney damage with long-term exposure
No detections reported
Kidney damage, neurological effects, developmental problems in children
No detections reported
Gastrointestinal illness, diarrhea, vomiting, potential kidney damage from E. coli
No detections reported
Hair loss, nerve damage, liver and kidney damage, gastrointestinal effects
Increased risk of bone cancer and leukemia from long-term exposure
Kidney damage and potential kidney failure, increased cancer risk
Increased cancer risk (bladder), liver and kidney damage, potential reproductive effects
Increased cancer risk, potential liver damage, developmental effects
Step 2 — treat what the test finds. A reverse osmosis system removes lead, arsenic, nitrates, PFAS and most other contaminants tracked above:
Not sure which type you need? Read reverse osmosis vs. whole-house filters, and check lead service lines in Oklahoma if lead is a concern for your home.
This page provides a comprehensive overview of water contaminants detected in Oklahoma's public water systems. Our data is compiled from EPA Safe Drinking Water Information System (SDWIS) reports and local water utility Consumer Confidence Reports (CCRs).
Water quality varies significantly across Oklahoma, influenced by factors such as:
Click on any contaminant above to see detailed information including health effects, which cities are most affected, and recommended water filtration options.