Water Quality: El Reno, OK
4 water systems • 19,135 people served
Multiple Health ViolationsWater Quality Summary
El Reno is served by 4 public water systems with a combined service population of 19,135 people, and has 136 EPA Safe Drinking Water Act violations on record. Critically, 50 of those are health-based violations, meaning one or more contaminants were detected above EPA-established safe levels — a serious public health concern. El Reno's violation count is 48% below the national average for Oklahoma. Contaminants associated with violations include E. coli, Fecal Coliform, Gross Alpha, Nitrate, Stage 2 DBP.
Contaminants Found
Causes gastrointestinal illness; certain strains (e.g., O157:H7) can cause severe kidney failure and death.
Common source: Fecal contamination from humans or animals entering the water supply
EPA limit: Zero (no E. coli permitted in drinking water)
Indicates direct fecal contamination; associated with diarrhea, cramps, nausea, and potential severe illness.
Common source: Human and animal fecal waste
EPA limit: Zero tolerance (any positive triggers violations)
Alpha-emitting radioactive particles increase cancer risk, particularly from bone and other internal cancers.
Common source: Natural uranium and radium in geological formations
EPA limit: 15 pCi/L (excluding radon and uranium)
Causes methemoglobinemia (blue baby syndrome) in infants, reducing the blood's ability to carry oxygen.
Common source: Fertilizer runoff, septic systems, animal feedlots, natural deposits
EPA limit: 10 mg/L (as nitrogen)
Trihalomethanes and haloacetic acids that increase cancer risk and may cause adverse reproductive outcomes.
Common source: Chlorine disinfection reacting with natural organic matter in source water
EPA limit: TTHM: 0.080 mg/L; HAA5: 0.060 mg/L
Total trihalomethanes are linked to increased risk of bladder cancer and adverse reproductive outcomes.
Common source: Reaction of chlorine disinfectants with naturally occurring organic matter in water
EPA limit: 0.080 mg/L (80 ppb)
Water Systems Serving El Reno
| System Name | PWSID | Source | Population | Violations |
|---|---|---|---|---|
| EL RENO | OK2000902 | Surface Water | 16,212 | 64 |
| CANADIAN CO WATER AUTHORITY | OK3000903 | Surface Water | 1,700 | 11 |
| CANADIAN CO RWD # 4 | OK2000930 | Groundwater | 907 | 8 |
| CANADIAN CO RWS & SWMD #5 | OK3000901 | Surface Water | 316 | 53 |
Concerned About Your Water?
A home water filter can remove common contaminants. NSF-certified filters are tested against EPA standards.
Consider a reverse osmosis system for comprehensive filtration or a carbon filter for basic improvement.
Other Cities in Oklahoma
Data Sources
Drinking water violation data from the EPA Safe Drinking Water Information System (SDWIS). Data includes all recorded violations for active community water systems.