B76/100
DELAWARE CO RWD #10 — Water Quality Report 2026
Serving 1,295 people · Oklahoma
Water Source
Groundwater
County
—
System ID
OK6002158
Violations
13
Contaminant Test Results
2 contaminants above EPA health goals
| Contaminant | Detected | Limit (MCL) | Status |
|---|---|---|---|
Copper (90th percentile) | 1.44 mg/L | 1.30 mg/L | Over Limit |
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 3Resolved
Surface water treatment technique failure
When: October 2, 2023 – May 6, 2024Enforcement: Resolving — corrective action underway
TIER 3Resolved
Monitoring Violation
This is a paperwork/process violation — it does not mean a contaminant was detected at unsafe levels.
When: December 1, 2022 – December 31, 2022Rule: Total Coliform 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: October 1, 2022 – December 31, 2022Rule: Stage 1 DBPREnforcement: Resolving — corrective action underway
TIER 3Resolved
Exceeded the MCL for disinfection byproducts
This is a paperwork/process violation — it does not mean a contaminant was detected at unsafe levels.
When: January 1, 2022 – December 31, 2022Enforcement: 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
Frequently Asked Questions About DELAWARE CO RWD #10
Is DELAWARE CO RWD #10 water safe to drink?
DELAWARE CO RWD #10 water receives a grade of B (76/100), which is considered good. Out of 2 contaminants tested, 1 exceed EPA legal limits. 2 contaminant(s) exceed non-enforceable health goals. The water meets federal safety standards.
What contaminants has DELAWARE CO RWD #10 detected?
2 contaminants were tested in DELAWARE CO RWD #10's water. Notable contaminants include Copper (90th percentile), Lead (90th percentile). 1 exceed EPA legal limits (MCLs). 2 exceed EPA health goals (MCLGs).
Does DELAWARE CO RWD #10 have any EPA violations?
Yes, DELAWARE CO RWD #10 has 13 EPA violation(s) on record, with the most recent in 2025. Violation types include Other, MON, MR.
How many people does DELAWARE CO RWD #10 serve?
DELAWARE CO RWD #10 serves approximately 1,295 people, Oklahoma.
What type of water does DELAWARE CO RWD #10 provide?
DELAWARE CO RWD #10 sources its water from groundwater. Groundwater is pumped from underground aquifers, which often provides natural filtration. The utility's system ID is OK6002158.
How does DELAWARE CO RWD #10 compare to other utilities in Oklahoma?
DELAWARE CO RWD #10 scores 76/100 with a grade of B (good). This is an above-average performance for utilities statewide. Visit our Oklahoma state page for a full comparison of water systems.