Is Wynnewood, OK Tap Water Safe to Drink?
Graded D — but Copper was detected above EPA limits. Here's what's in the water and how to remove it. What to do next ↓
45/100
waterverge.com Wynnewood, OK — Water Quality Report
Wynnewood's drinking water received a grade of D (45 out of 100), indicating poor water quality. The city's 3 water systems serve approximately 4,849 residents using surface water.
Lead levels were measured at 1.2 ppb (90th percentile), well within EPA limits. This system has not yet been tested for PFAS under the EPA UCMR 5 program.
The system has 142 violations on record, including 85 health-based violations. 8 remain unresolved.
What to know about Wynnewood's water
Wynnewood ranks #312 out of 358 cities in Oklahoma for water quality, placing it among the lowest-rated in the state.
The city draws from surface water sources, which are more susceptible to seasonal runoff and agricultural contamination, requiring extensive multi-barrier treatment including coagulation, filtration, and disinfection.
The system has seen 21 violations in the past five years, suggesting a pattern of compliance challenges that residents should monitor closely.
Water quality score
See methodology →Is Wynnewood, OK water safe to drink?
Wynnewood's drinking water has significant quality concerns based on EPA testing data. With a grade of D (45/100), the system has issues across multiple categories. A water filter is recommended for all residents. The city's 3 water systems serve approximately 4,849 residents using surface water (rivers, lakes, or reservoirs).
Recent water quality updates for Wynnewood
A timeline of significant water quality events, violations, and data updates.
Latest EPA compliance and testing data incorporated into Wynnewood's water quality assessment. Grade: D (45/100).
Contaminants: TTHM, Total Haloacetic Acids (HAA5).
1 health-based. Contaminants: Consumer Confidence Rule, TTHM.
1 health-based. Contaminants: Endothall, TTHM.
Federal disaster declaration (FEMA DR-4274). Flood event — may have impacted local water infrastructure.
Federal disaster declaration (FEMA DR-3219). Hurricane event — may have impacted local water infrastructure.
Key contaminant findings
Based on the most recent EPA sampling data for Wynnewood's water supply.
Well within EPA limits.
Exceeds EPA action level. Copper can leach from household plumbing — flush taps for 30 seconds before drinking.
Violation history
Wynnewood's water system has 142 total violations on record, including 85 health-based violations. 8 remain unresolved. 21 violations were issued in the last 5 years.
Flood & environmental risk
Garvin County has experienced 5 federally declared disasters since 1973. Flooding and severe storms can overwhelm water treatment plants, cause sewage overflows, and introduce agricultural runoff, bacteria, and sediment into drinking water supplies. Local water sources include Washita River Near Pauls Valley, Wildhorse Creek Near Hoover.
Where does Wynnewood's water come from?
Wynnewood's drinking water comes from surface water (rivers, lakes, or reservoirs), supplied by 3 water systems serving approximately 4,849 people. Surface water sources are more susceptible to contamination from runoff, industrial discharge, and algal blooms, requiring extensive treatment. Nearby water bodies include Washita River Near Pauls Valley (river), Wildhorse Creek Near Hoover (river).
What Wynnewood residents can do
Recommended: NSF-certified water filter. This addresses the specific contaminants found in Wynnewood's water.
Your water utility is required to publish an annual Consumer Confidence Report (CCR) with detailed testing results. Ask for the latest copy or check your utility's website.
Wynnewood's area has a history of flooding. After severe weather, watch for boil water advisories from your local utility.
Data: EPA SDWIS, UCMR 5 (PFAS), FEMA, NOAA. Last updated May 2026.
Top contaminants to know
View all ↓Violation summary
Violations & advisories
Top industrial polluters within 10 miles of Wynnewood
Industrial polluters nearby
Reported releases to surface water by facilities near Wynnewood, ranked by pounds discharged annually.
Total reported releases to surface water: 2,465 lbs
| Facility | Top chemical | To surface water (lbs/yr) | Distance |
|---|---|---|---|
WYNNEWOOD REFINING CO WYNNEWOOD, OK73098 | Acetamide, N-(2-aminoethyl), 2[(γ-ω-perfluoro-C4-20-alkyl)thio] derivs., polymers with N1,N1-dimethyl-1,3-propanediamine, epichlorohydrin and ethylenediamine, oxidized | 2,465 | 0.5 mi |
TESSENDERLO KERLEY INC. WYNNEWOOD PLANT WYNNEWOOD, OK73098 | — | — | 0.7 mi |
Source: EPA Toxic Release Inventory (TRI) 2023
Drought conditions
D1 — moderate droughtGarvin County is currently in D1 (moderate drought) per the U.S. Drought Monitor (week of May 5, 2026). Drought can elevate disinfection-byproduct (TTHM/HAA5) levels and taste/odor issues as utilities draw from lower reservoirs.
Source: U.S. Drought Monitor, updated weekly by NDMC, USDA, and NOAA.
Flood & disaster history
Garvin County has experienced 5 federally declared disasters since 1973. Flooding and severe weather can compromise water treatment infrastructure and introduce contaminants into drinking water supplies.
Recommended water filters
Based on contaminants detected in Wynnewood's water supply, we recommend the following filter types.
Full contaminants report
| Contaminant | Detected Level | EPA Limit | Unit | Category | Status |
|---|---|---|---|---|---|
| Lead (90th percentile) LeadHeavy Metal A toxic heavy metal that can leach into drinking water from older pipes, solder, and fixtures. No amount of lead in water is considered safe. Health EffectsBrain and nervous system damage in children, kidney damage, high blood pressure, and reproductive problems in adults. EPA Limit15 ppb action level Common SourcesCorrosion of lead pipes, lead solder, brass faucets, and household plumbing. | 1.2 | 15 | ppb | Inorganic | Safe |
| Copper (90th percentile) CopperInorganic A metal that enters drinking water mainly through corrosion of copper plumbing. Small amounts are essential for health, but excess levels are harmful. Health EffectsGastrointestinal distress (nausea, vomiting, diarrhea) at short-term high levels; liver and kidney damage from long-term exposure. EPA Limit1.3 mg/L action level Common SourcesCorrosion of copper household plumbing, erosion of natural deposits. | 2.40 | 1.3 | mg/L | Inorganic | Over Limit |
Lead level trend (90th percentile)
Copper level trend (90th percentile)
See how Wynnewood compares by contaminant
Explore where Wynnewood ranks among all Oklahoma cities for specific contaminants.
Water source & infrastructure
Where Wynnewood's water comes from
Wynnewood's drinking water comes primarily from surface water sources such as rivers, lakes, or reservoirs.
Surface water systems require multi-stage treatment including coagulation, sedimentation, filtration, and disinfection to meet EPA Safe Drinking Water Act standards.
These sources can be impacted by seasonal changes, stormwater runoff, upstream agriculture, and industrial discharge.
The system is operated by local government ownership and serves approximately 4,849 people through 3 water systems.
Water bodies near Wynnewood
Wynnewood is located near 2 notable water bodies. As a surface water system, these water bodies may directly influence the city's drinking water supply.
Water systems serving Wynnewood
| System Name | PWSID | Population | Source |
|---|---|---|---|
| WYNNEWOOD WATER & LIGHT | OK1010812 | 2,307 | SW |
| GARVIN CO RWD # 6 (WELLS) | OK2002511 | 1,680 | GW |
| GARVIN CO RWD #6 (SW PURCHASE) | OK3002515 | 862 | SWP |
How Wynnewood compares
Full Oklahoma rankings →Wynnewood's score of 45/100 is on par with the average of 45/100 among major Oklahoma cities. It outscores 8 of 10 nearby cities.
Nearby cities
View Oklahoma rankings →About Wynnewood, OK
Learn more about your water
Guides and resources related to Wynnewood's water quality findings.
Explore water quality across Garvin
Frequently asked questions
Is Wynnewood, OK tap water safe to drink?
Wynnewood's water quality earned a grade of D (45/100). Significant issues have been found. A water filter is strongly recommended. The city ranks #312 out of 358 cities tested in Oklahoma.
What contaminants are in Wynnewood's water?
Lead was measured at 1.2 ppb (90th percentile). 142 violations are on record.
How is Wynnewood's water quality grade calculated?
The grade is based on four factors: violation history (40%), lead and copper levels (25%), PFAS contamination (25%), and regulatory compliance (10%). The score is also adjusted based on how complete the available data is. See our methodology page for full details.
Do I need a water filter in Wynnewood?
Based on current data, basic filtration should suffice for additional peace of mind.
Where does Wynnewood's water come from?
Wynnewood's water is sourced from Surface water. The city has 3 water systems serving approximately 4,849 residents.
What health violations has Wynnewood's water system had?
Wynnewood has 85 health-based violations on record. The most recent violation was recorded in October 2025. Health-based violations mean the water exceeded EPA maximum contaminant levels (MCLs) for a regulated substance. 8 violations remain unresolved.
How does Wynnewood's water compare to other cities?
Wynnewood ranks #312 out of 358 cities in Oklahoma (better than 13% of state cities) and #14241 out of 15744 cities nationally (10th percentile). The grade of D reflects the combined assessment of violation history, lead and copper levels, PFAS contamination, and regulatory compliance.