TapSafetyReport
B78/100

MAYES CO RWD #4 — Water Quality Report 2026

Serving 4,183 people · Oklahoma

Water Source
Purchased Surface Water
County
—
System ID
OK3004617
Violations
11

Contaminant Test Results

1 contaminant above EPA health goals
ContaminantDetectedLimit (MCL)Status
Lead (90th percentile)
0.001 mg/L0.015 mg/LAbove Goal

EPA Violation History

6

Violations (last 5yr)

3

Unresolved

1

Health-Related

TIER 3Unresolved

Failed to issue ongoing public notification

This is a paperwork/process violation — it does not mean a contaminant was detected at unsafe levels.

When: July 1, 2025Rule: Ground Water RuleEnforcement: Informal — resolved cooperativelyVerify on EPA.gov
TIER 3Unresolved

Reporting violation

This is a paperwork/process violation — it does not mean a contaminant was detected at unsafe levels.

When: October 17, 2024Rule: Ground Water RuleEnforcement: Informal — resolved cooperativelyVerify on EPA.gov
TIER 2Unresolved

Treatment technique violation

When: October 17, 2024Rule: Ground Water RuleEnforcement: Informal — resolved cooperativelyVerify on EPA.gov
TIER 3Resolved

Surface water treatment technique failure

When: July 1, 2024 – July 1, 2025Enforcement: Resolving — corrective action underway
TIER 3Resolved

Failed to issue ongoing public notification

This is a paperwork/process violation — it does not mean a contaminant was detected at unsafe levels.

When: July 1, 2024 – December 10, 2024Rule: Ground Water RuleEnforcement: Resolving — corrective action underway
TIER 3Resolved

Failed to issue ongoing public notification

This is a paperwork/process violation — it does not mean a contaminant was detected at unsafe levels.

When: October 1, 2023 – December 10, 2024Rule: Ground Water RuleEnforcement: 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 MAYES CO RWD #4

Is MAYES CO RWD #4 water safe to drink?

MAYES CO RWD #4 water receives a grade of B (78/100), which is considered good. Out of 31 contaminants tested, none exceed EPA legal limits. 1 contaminant(s) exceed non-enforceable health goals. The water meets federal safety standards.

What contaminants has MAYES CO RWD #4 detected?

31 contaminants were tested in MAYES CO RWD #4's water. Notable contaminants include Lead (90th percentile). No contaminants exceed EPA legal limits. 1 exceed EPA health goals (MCLGs).

Does MAYES CO RWD #4 have any EPA violations?

Yes, MAYES CO RWD #4 has 11 EPA violation(s) on record, with the most recent in 2025. Violation types include MR, RPT, TT. 2 are health-based violations.

How many people does MAYES CO RWD #4 serve?

MAYES CO RWD #4 serves approximately 4,183 people, Oklahoma.

What type of water does MAYES CO RWD #4 provide?

MAYES CO RWD #4 sources its water from purchased surface water. Surface water comes from rivers, lakes, or reservoirs and typically requires more extensive treatment. The utility's system ID is OK3004617.

How does MAYES CO RWD #4 compare to other utilities in Oklahoma?

MAYES CO RWD #4 scores 78/100 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.