TapSafetyReport
D38/100

GUYMON — Water Quality Report 2026

Serving 11,442 people · Oklahoma

Water Source
Groundwater
County
—
System ID
OK2007003
Violations
19

Contaminant Test Results

1 contaminant above EPA health goals
ContaminantDetectedLimit (MCL)Status
1,4-dioxane
0.550 µg/L—Above Goal

EPA Violation History

6

Violations (last 5yr)

0

Unresolved

1

Health-Related

TIER 1 — URGENTResolved

Exceeded the Maximum Contaminant Level (single sample)

When: January 1, 2025 – September 3, 2025Enforcement: Formal — state order issued
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, 2023 – December 31, 2023Enforcement: 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, 2023 – December 31, 2023Enforcement: 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, 2023 – December 31, 2023Enforcement: 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, 2023 – December 31, 2023Enforcement: 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, 2023 – December 31, 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

Frequently Asked Questions About GUYMON

Is GUYMON water safe to drink?

GUYMON water receives a grade of D (38/100), which is considered poor. 0 contaminant(s) exceed EPA legal limits and 19 violation(s) are on record. Customers may want to consider using a water filter.

What contaminants has GUYMON detected?

66 contaminants were tested in GUYMON's water. Notable contaminants include 1,4-dioxane. No contaminants exceed EPA legal limits. 1 exceed EPA health goals (MCLGs).

Does GUYMON have any EPA violations?

Yes, GUYMON has 19 EPA violation(s) on record, with the most recent in 2025. Violation types include MCL, MR, MON. 10 are health-based violations.

How many people does GUYMON serve?

GUYMON serves approximately 11,442 people, Oklahoma.

What type of water does GUYMON provide?

GUYMON sources its water from groundwater. Groundwater is pumped from underground aquifers, which often provides natural filtration. The utility's system ID is OK2007003.

How does GUYMON compare to other utilities in Oklahoma?

GUYMON scores 38/100 with a grade of D (poor). This score suggests significant water quality concerns relative to other utilities. Visit our Oklahoma state page for a full comparison of water systems.