A89/100
South Coffeyville Tap Water Quality: Is It Safe to Drink? (2026 Report)
Serving 1,113 residents · Oklahoma
What's In South Coffeyville's Tap Water?
1
Contaminants Tested
0
Exceed EPA Limits
1
Above EPA Goals
1 contaminant above EPA health goals
| Contaminant | Detected | Limit (MCL) | Status |
|---|---|---|---|
Lead (90th percentile) | < 0.001 mg/L | 0.015 mg/L | Above Goal |
EPA Violation History
5
Violations (last 5yr)
1
Unresolved
0
Health-Related
TIER 3Unresolved
Reporting Violation
This is a paperwork/process violation — it does not mean a contaminant was detected at unsafe levels.
TIER 3Resolved
Reporting violation
This is a paperwork/process violation — it does not mean a contaminant was detected at unsafe levels.
When: October 17, 2024 – October 29, 2024Rule: Ground Water RuleEnforcement: Resolving — corrective action underway
TIER 3Resolved
Failed Level 2 Assessment under Revised Total Coliform Rule
This is a paperwork/process violation — it does not mean a contaminant was detected at unsafe levels.
When: July 1, 2024 – September 30, 2024Rule: Stage 2 DBPREnforcement: Resolving — corrective action underway
TIER 3Resolved
Failed Level 2 Assessment under Revised Total Coliform Rule
This is a paperwork/process violation — it does not mean a contaminant was detected at unsafe levels.
When: July 1, 2024 – September 30, 2024Rule: Stage 2 DBPREnforcement: Resolving — corrective action underway
TIER 3Resolved
Surface water treatment technique failure
When: October 2, 2022 – March 15, 2023Enforcement: Resolving — corrective action underway
Understanding violation severity
Tier 1Urgent health risk. Utility must notify all customers within 24 hours.Tier 2Important health or treatment issue. Customers notified within 30 days.Tier 3Administrative or monitoring issue. Reported in the annual water quality report.
Source: EPA Safe Drinking Water Information System (SDWIS) · Updated quarterly
Water Utility Details
MONTGOMERY CO RWD 2C A
Population Served
1,113
Water Source
Purchased Surface Water
System ID
KS2012526
Frequently Asked Questions About South Coffeyville Water
Is South Coffeyville tap water safe to drink?
South Coffeyville, Oklahoma tap water receives a grade of A (89/100), which is considered excellent. Out of 1 contaminants tested, none exceed EPA maximum contaminant levels (MCLs) and 1 exceed health guidelines (MCLGs). While the water meets federal standards, some residents may still choose to use a filter for additional peace of mind.
What contaminants are in South Coffeyville's water?
Of the 1 contaminants tested in South Coffeyville's water supply, the most notable include Lead (90th percentile). No contaminants exceed EPA legal limits. 1 contaminant(s) exceed EPA health goals (MCLGs), which are non-enforceable targets set at levels with no known health risk.
Does South Coffeyville have any water quality violations?
Yes, South Coffeyville has 8 EPA violation(s) on record, with the most recent in 2025. Violation types include RPT, MR, Other. None of these are classified as health-based violations.
Do I need a water filter in South Coffeyville?
South Coffeyville water meets EPA standards, so a filter is not strictly necessary. However, some residents prefer the added security of a water filter. EPA health goals (MCLGs) are stricter than legal limits and are set at levels with zero expected health risk. 1 contaminant(s) exceed these stricter goals.
Where does South Coffeyville's tap water come from?
South Coffeyville's drinking water is sourced from purchased surface water and supplied by MONTGOMERY CO RWD 2C A. The system serves approximately 1,113 people. Surface water sources include rivers, lakes, and reservoirs.
How often is South Coffeyville's water tested?
Under the Safe Drinking Water Act (SDWA), water utilities are required to regularly test for over 90 contaminants. Testing frequency varies by contaminant — some are tested monthly, others quarterly or annually. South Coffeyville's water systems must report results to the EPA and publish an annual Consumer Confidence Report (CCR). The data on this page reflects the latest available EPA testing data.
How does South Coffeyville's water compare to other cities in Oklahoma?
South Coffeyville's water quality score of 89/100 earns a grade of A, which is considered excellent. This places South Coffeyville among the better-performing water systems in Oklahoma. Visit our Oklahoma state page to see how all cities in the state compare.
What should I do if I'm concerned about South Coffeyville's water quality?
If you have concerns about South Coffeyville's tap water, consider these steps: (1) Request your utility's annual Consumer Confidence Report for detailed local data. (2) Get your water independently tested through a state-certified laboratory. (3) Consider an NSF-certified water filter rated for the contaminants found in your area. (4) Contact your water utility (MONTGOMERY CO RWD 2C A) with specific questions. (5) Report water quality issues to your state drinking water program or the EPA Safe Drinking Water Hotline at 800-426-4791.