Is Butler, OK Tap Water Safe to Drink?
Graded B-, with 7 unresolved violations on record. See what was cited — and what it means for your tap. What to do next ↓
73/100
waterverge.com Butler, OK — Water Quality Report
Butler's drinking water received a grade of B- (73 out of 100), indicating fair water quality. The city's 2 water systems serve approximately 782 residents using purchased surface water.
Lead levels were measured at 0.0 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 34 violations on record, including 1 health-based violation. 7 remain unresolved.
What to know about Butler's water
Butler ranks #113 out of 358 cities in Oklahoma for water quality, placing it mid-range 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.
As a small community water system, Butler may have fewer resources for advanced treatment technologies and infrastructure upgrades compared to larger utilities.
The system has seen 18 violations in the past five years, suggesting a pattern of compliance challenges that residents should monitor closely.
Water quality score
See methodology →Is Butler, OK water safe to drink?
Butler's drinking water has significant quality concerns based on EPA testing data. With a grade of B- (73/100), the system has issues across multiple categories. A water filter is recommended for all residents. The city's 2 water systems serve approximately 782 residents using surface water (rivers, lakes, or reservoirs).
Recent water quality updates for Butler
A timeline of significant water quality events, violations, and data updates.
Latest EPA compliance and testing data incorporated into Butler's water quality assessment. Grade: B- (73/100).
1 health-based. Contaminants: LEAD AND COPPER RULE REVISIONS.
Contaminants: Revised Total Coliform Rule, Chlorine.
Contaminants: Revised Total Coliform Rule.
Federal disaster declaration (FEMA DR-3219). Hurricane event — may have impacted local water infrastructure.
Federal disaster declaration (FEMA DR-794). Flood event — may have impacted local water infrastructure.
Key contaminant findings
Based on the most recent EPA sampling data for Butler's water supply.
Well within EPA limits.
Violation history
Butler's water system has 34 total violations on record, including 1 health-based violation. 7 remain unresolved. 18 violations were issued in the last 5 years.
Flood & environmental risk
Custer County has experienced 4 federally declared disasters since 1982. 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 Hammon, Foss Reservoir Near Foss, Washita River Near Foss.
Where does Butler's water come from?
Butler's drinking water comes from surface water (rivers, lakes, or reservoirs), supplied by 2 water systems serving approximately 782 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 Hammon (river), Foss Reservoir Near Foss (lake), Washita River Near Foss (river).
What Butler residents can do
Recommended: NSF-certified water filter. This addresses the specific contaminants found in Butler'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.
Butler'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 Butler
Industrial polluters nearby
Reported releases to surface water by facilities near Butler, ranked by pounds discharged annually.
| Facility | Top chemical | To surface water (lbs/yr) | Distance |
|---|---|---|---|
MCCLURE NATURAL GAS PROCESSING PLANT BUTLER, OK73625 | — | — | 0.3 mi |
ARAPAHO GAS PROCESSING PLT BUTLER, OK73625 | — | — | 0.2 mi |
Source: EPA Toxic Release Inventory (TRI) 2023
Drought conditions
D3 — extreme droughtCuster County is currently in D3 (extreme 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
Custer County has experienced 4 federally declared disasters since 1982. Flooding and severe weather can compromise water treatment infrastructure and introduce contaminants into drinking water supplies.
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. | 0.0 | 15 | ppb | Inorganic | Safe |
Lead level trend (90th percentile)
See how Butler compares by contaminant
Explore where Butler ranks among all Oklahoma cities for specific contaminants.
Water source & infrastructure
Where Butler's water comes from
Butler'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 private ownership and serves approximately 782 people through 2 water systems.
Water bodies near Butler
Butler is located near 3 notable water bodies. As a surface water system, these water bodies may directly influence the city's drinking water supply.
Water systems serving Butler
| System Name | PWSID | Population | Source |
|---|---|---|---|
| FRONTIER DEVELOPMENT AUTH | OK3002011 | 437 | SWP |
| BUTLER | OK3002001 | 345 | SWP |
How Butler compares
Full Oklahoma rankings →Butler's score of 73/100 is above the average of 45/100 among major Oklahoma cities. It outscores 9 of 10 nearby cities.
Nearby cities
View Oklahoma rankings →About Butler, OK
Learn more about your water
Guides and resources related to Butler's water quality findings.
Explore water quality across Custer
Frequently asked questions
Is Butler, OK tap water safe to drink?
Butler's water quality earned a grade of B- (73/100). Some concerns have been identified. Consider a water filter for an extra layer of protection. The city ranks #113 out of 358 cities tested in Oklahoma.
What contaminants are in Butler's water?
Lead was measured at 0.0 ppb (90th percentile). 34 violations are on record.
How is Butler'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 Butler?
Based on current data, basic filtration should suffice for additional peace of mind.
Where does Butler's water come from?
Butler's water is sourced from Purchased surface water. The city has 2 water systems serving approximately 782 residents.
What health violations has Butler's water system had?
Butler has 1 health-based violation on record. The most recent violation was recorded in October 2024. Health-based violations mean the water exceeded EPA maximum contaminant levels (MCLs) for a regulated substance. 7 violations remain unresolved.
How does Butler's water compare to other cities?
Butler ranks #113 out of 358 cities in Oklahoma (better than 68% of state cities) and #10195 out of 15744 cities nationally (35th percentile). The grade of B- reflects the combined assessment of violation history, lead and copper levels, PFAS contamination, and regulatory compliance.