Is South Coffeyville, OK Tap Water Safe to Drink?
Graded A-, with 2 unresolved violations on record. See what was cited — and what it means for your tap. What to do next ↓
86/100
waterverge.com South Coffeyville, OK — Water Quality Report
South Coffeyville's drinking water received a grade of A- (86 out of 100), indicating good water quality. The city's 1 water system serves approximately 790 residents using purchased surface water.
Lead levels were measured at 2.7 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 18 violations on record, including 3 health-based violations. 2 remain unresolved.
What to know about South Coffeyville's water
South Coffeyville ranks #40 out of 358 cities in Oklahoma for water quality, placing it above average 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, South Coffeyville may have fewer resources for advanced treatment technologies and infrastructure upgrades compared to larger utilities.
The system has seen 7 violations in the past five years, suggesting a pattern of compliance challenges that residents should monitor closely.
Water quality score
See methodology →Is South Coffeyville, OK water safe to drink?
South Coffeyville's tap water meets most EPA standards but has areas that warrant attention. With a grade of A- (86/100), some contaminant levels or compliance issues suggest that residents may benefit from additional filtration. The city's 1 water system serves approximately 790 residents using surface water (rivers, lakes, or reservoirs).
Recent water quality updates for South Coffeyville
A timeline of significant water quality events, violations, and data updates.
Latest EPA compliance and testing data incorporated into South Coffeyville's water quality assessment. Grade: A- (86/100).
Contaminants: Revised Total Coliform Rule, Chloramine.
Contaminants: Revised Total Coliform Rule, Chlorine.
1 health-based. Contaminants: Chlorine.
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 South Coffeyville's water supply.
Well within EPA limits.
Violation history
South Coffeyville's water system has 18 total violations on record, including 3 health-based violations. 2 remain unresolved. 7 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 South Coffeyville's water come from?
South Coffeyville's drinking water comes from surface water (rivers, lakes, or reservoirs), supplied by 1 water system serving approximately 790 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 South Coffeyville residents can do
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
Top industrial polluters within 10 miles of South Coffeyville
Industrial polluters nearby
Reported releases to surface water by facilities near South Coffeyville, ranked by pounds discharged annually.
Total reported releases to surface water: 58,485 lbs
| Facility | Top chemical | To surface water (lbs/yr) | Distance |
|---|---|---|---|
COFFEYVILLE RESOURCES REFINING & MARKETING COFFEYVILLE, KS67337 | Nitrate compounds (water dissociable; reportable only when in aqueous solution) | 58,485 | 3.7 mi |
SP FOUNDRY SOUTH COFFEYVILLE, OK74072 | — | — | 0.5 mi |
ACME FOUNDRY INC COFFEYVILLE, KS67337 | — | — | 2.4 mi |
JOHN DEERE COFFEYVILLE WORKS A DIV OF DEERE & COMPAN COFFEYVILLE, KS67337 | — | — | 1.6 mi |
COFFEYVILLE RESOURCES NITROGEN FERTILIZERS LLC COFFEYVILLE, KS67337 | — | — | 3.8 mi |
Source: EPA Toxic Release Inventory (TRI) 2023
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. | 2.7 | 15 | ppb | Inorganic | Safe |
Lead level trend (90th percentile)
See how South Coffeyville compares by contaminant
Explore where South Coffeyville ranks among all Oklahoma cities for specific contaminants.
Water source & infrastructure
Where South Coffeyville's water comes from
South 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 790 people through 1 water system.
Water bodies near South Coffeyville
South 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 South Coffeyville
| System Name | PWSID | Population | Source |
|---|---|---|---|
| SOUTH COFFEYVILLE | OK3005305 | 790 | SWP |
How South Coffeyville compares
Full Oklahoma rankings →South Coffeyville's score of 86/100 is above the average of 45/100 among major Oklahoma cities. It outscores 10 of 10 nearby cities.
Nearby cities
View Oklahoma rankings →About South 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 South Coffeyville's water quality findings.
Explore water quality across Nowata
Frequently asked questions
Is South Coffeyville, OK tap water safe to drink?
South Coffeyville's water quality earned a grade of A- (86/100). The water generally meets EPA standards and is considered safe for consumption. The city ranks #40 out of 358 cities tested in Oklahoma.
What contaminants are in South Coffeyville's water?
Lead was measured at 2.7 ppb (90th percentile). 18 violations are on record.
How is South 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 South Coffeyville?
Based on current data, basic filtration should suffice for additional peace of mind.
Where does South Coffeyville's water come from?
South Coffeyville's water is sourced from Purchased surface water. The city has 1 water system serving approximately 790 residents.
What health violations has South Coffeyville's water system had?
South Coffeyville has 3 health-based violations on record. The most recent violation was recorded in November 2025. Health-based violations mean the water exceeded EPA maximum contaminant levels (MCLs) for a regulated substance. 2 violations remain unresolved.
How does South Coffeyville's water compare to other cities?
South Coffeyville ranks #40 out of 358 cities in Oklahoma (better than 89% of state cities) and #5007 out of 15744 cities nationally (68th percentile). The grade of A- reflects the combined assessment of violation history, lead and copper levels, PFAS contamination, and regulatory compliance.
Does South Coffeyville's small water system affect quality?
South Coffeyville's system serves approximately 790 residents. Small community water systems (under 3,300 people) may have fewer financial resources for infrastructure upgrades and advanced treatment technologies. However, they are held to the same EPA drinking water standards as larger systems. This system has 18 violations on record.