Is Coffeyville, OK Tap Water Safe to Drink?
Graded F, with 63 unresolved violations on record. See what was cited — and what it means for your tap. What to do next ↓
44/100
waterverge.com Coffeyville, OK — Water Quality Report
Coffeyville's drinking water received a grade of F (44 out of 100), indicating failing water quality. The city's 2 water systems serve approximately 2,163 residents using purchased 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 109 violations on record, including 18 health-based violations. 63 remain unresolved.
What to know about Coffeyville's water
Coffeyville ranks #326 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.
As a small community water system, Coffeyville may have fewer resources for advanced treatment technologies and infrastructure upgrades compared to larger utilities.
The system has seen 55 violations in the past five years, suggesting a pattern of compliance challenges that residents should monitor closely.
Water quality score
See methodology →Is Coffeyville, OK water safe to drink?
Coffeyville's drinking water has significant quality concerns based on EPA testing data. With a grade of F (44/100), the system has issues across multiple categories. A water filter is recommended for all residents. The city's 2 water systems serve approximately 2,163 residents using surface water (rivers, lakes, or reservoirs).
Recent water quality updates for Coffeyville
A timeline of significant water quality events, violations, and data updates.
Latest EPA compliance and testing data incorporated into Coffeyville's water quality assessment. Grade: F (44/100).
Contaminants: Lead and Copper Rule, Consumer Confidence Rule.
Contaminants: Total Haloacetic Acids (HAA5), TTHM.
1 health-based. Contaminants: Total Haloacetic Acids (HAA5), Lead and Copper Rule.
Federal disaster declaration (FEMA DR-3219). Hurricane event — may have impacted local water infrastructure.
Federal disaster declaration (FEMA DR-778). Flood event — may have impacted local water infrastructure.
Key contaminant findings
Based on the most recent EPA sampling data for Coffeyville's water supply.
Well within EPA limits.
Violation history
Coffeyville's water system has 109 total violations on record, including 18 health-based violations. 63 remain unresolved. 55 violations were issued in the last 5 years.
Flood & environmental risk
Nowata County has experienced 2 federally declared disasters since 1986. 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 Verdigris R, Verdigris River Near Lenapah.
Where does Coffeyville's water come from?
Coffeyville's drinking water comes from surface water (rivers, lakes, or reservoirs), supplied by 2 water systems serving approximately 2,163 people. Surface water sources are more susceptible to contamination from runoff, industrial discharge, and algal blooms, requiring extensive treatment. Nearby water bodies include Verdigris R (river), Verdigris River Near Lenapah (river).
What Coffeyville residents can do
Recommended: NSF-certified water filter. This addresses the specific contaminants found in Coffeyville'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.
Data: EPA SDWIS, UCMR 5 (PFAS), FEMA, NOAA. Last updated May 2026.
Top contaminants to know
View all ↓Violation summary
Violations & advisories
Drought conditions
D1 — moderate droughtNowata 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
Nowata County has experienced 2 federally declared disasters since 1986. 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. | 1.2 | 15 | ppb | Inorganic | Safe |
Lead level trend (90th percentile)
See how Coffeyville compares by contaminant
Explore where Coffeyville ranks among all Oklahoma cities for specific contaminants.
Water source & infrastructure
Where Coffeyville's water comes from
Coffeyville'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 2,163 people through 2 water systems.
Water bodies near Coffeyville
Coffeyville 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 Coffeyville
| System Name | PWSID | Population | Source |
|---|---|---|---|
| MONTGOMERY CO RWD 2C A | KS2012526 | 1,113 | SWP |
| NOWATA CO RWD #7 | OK3005321 | 1,050 | SWP |
How Coffeyville compares
Full Oklahoma rankings →Coffeyville's score of 44/100 is on par with the average of 45/100 among major Oklahoma cities. It outscores 6 of 10 nearby cities.
Nearby cities
View Oklahoma rankings →About Coffeyville, OK
Wikipedia →South Coffeyville is a town in Nowata County, Oklahoma, United States. As of the 2020 census, South Coffeyville had a population of 683. The city of Coffeyville, Kansas is located approximately one mile north of the city, existing as a separate political entity.
Learn more about your water
Guides and resources related to Coffeyville's water quality findings.
Explore water quality across Montgomery
Frequently asked questions
Is Coffeyville, OK tap water safe to drink?
Coffeyville's water quality earned a grade of F (44/100). Significant issues have been found. A water filter is strongly recommended. The city ranks #326 out of 358 cities tested in Oklahoma.
What contaminants are in Coffeyville's water?
Lead was measured at 1.2 ppb (90th percentile). 109 violations are on record.
How is Coffeyville'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 Coffeyville?
Based on current data, basic filtration should suffice for additional peace of mind.
Where does Coffeyville's water come from?
Coffeyville's water is sourced from Purchased surface water. The city has 2 water systems serving approximately 2,163 residents.
What health violations has Coffeyville's water system had?
Coffeyville has 18 health-based violations on record. The most recent violation was recorded in July 2025. Health-based violations mean the water exceeded EPA maximum contaminant levels (MCLs) for a regulated substance. 63 violations remain unresolved.
How does Coffeyville's water compare to other cities?
Coffeyville ranks #326 out of 358 cities in Oklahoma (better than 9% of state cities) and #14477 out of 15744 cities nationally (8th percentile). The grade of F reflects the combined assessment of violation history, lead and copper levels, PFAS contamination, and regulatory compliance.