DrinkingWaterCheck

GUYMON: EPA violation history, explained

GUYMON had a health-based violation within the last five years. The required corrective action was reported, but it happened recently enough to matter. It serves 11,442 people through 4,800 service connections.

Ranked against every other system in this dataset

23 total violations and 10 health-based ones put GUYMON at the 85th percentile nationally for violation burden, rank 1,961 of 12,903.

Against the OK average

GUYMON's 10 health-based violations sit within the OK average of 39.5, across 240 systems statewide. The clean-record guide covers what a comparison like this can hide.

Most recent violation on record

GUYMON's most recent violation on record is dated 2025-01-01, with the most recent health-based one dated 2025-01-01. Last reported to EPA: 05/13/2026.

The concern categories on record

GUYMON's flagged contaminants and rule violations, grouped by what they actually mean for a filter choice rather than left as EPA's raw code list:

The most severe category on record is microbial contamination / treatment technique, which points toward a microbial-class filter if you want to address it directly.

What GUYMON's record does not cover

Everything on this page is GUYMON's own reported record under the Safe Drinking Water Act - a regulatory filing, not a sample of your tap. Water quality can still change between the meter and the faucet - household plumbing sits outside what a record of 23 logged violations can see. The guide to what this data misses covers that gap.