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EPA SDWIS

Harmon County Water Quality

Harmon County, Oklahoma

Water Grade

F

Water Score

32.5

Violations

2

State Rank

#11

of 77 (1 = best)

EPA SDWIS Compliance

Drinking Water Quality

Water Quality Grade

F

Based on EPA compliance history and violation data

Water Score

32.5/100

Higher = better quality

Health Violations

2

Health-based violations

Violation Rate

55.5%

Systems with violations

Water Advisory: Harmon County

Water Verdict

Harmon County receives a poor water quality assessment with a grade of F and a score of 32.5 out of 100. The water supply has documented quality issues. Residents are strongly encouraged to use filtered or bottled water for drinking and to stay informed about utility improvement plans.

Violation Context

Harmon County has recorded 2 health-based violations, indicating multiple instances where federal contaminant limits or treatment requirements were not met. At 55.5 violations per 1,000 residents, this rate is high and signals significant water quality management issues.

Consumer Guidance

Residents of Harmon County are advised to use filtered or bottled water for drinking and cooking until water quality improves. A reverse-osmosis or activated-carbon filter certified to remove the contaminants listed in the utility's Consumer Confidence Report is recommended. With 2 recorded health violations, staying informed about utility communications and boil-water notices is especially important. For long-term peace of mind, request your utility's latest Consumer Confidence Report and consider independent water testing if you have specific health concerns.

Regional Context

Harmon County has better water quality than the average county in Oklahoma. Its water score is 16.7 points higher than the state average, indicating stronger water system performance relative to neighboring counties.

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Frequently Asked Questions

What is the water quality in Harmon County, Oklahoma?
Harmon County, Oklahoma has a drinking-water quality grade of F with a score of 32.5/100, based on EPA SDWIS compliance data. The county has 2 health-based drinking water violations over the past 5 years. Watershed health, monitoring records, and live streamflow are reported separately on this page.
Are there any water violations in Harmon County?
Harmon County has 2 health-based drinking water violations recorded by the EPA over the past 5 years. Health-based violations indicate instances where contaminant levels exceeded EPA Maximum Contaminant Levels (MCLs). Violations may have been resolved — check with your local water utility for current status.
How does Harmon County water compare to the Oklahoma average?
Harmon County's SDWIS water quality score of 32.5/100 is higher than the Oklahoma state average of 15.8. The average water quality grade across Oklahoma is F, based on data from 77 counties with available SDWIS data.
Is tap water safe to drink in Harmon County?
Based on EPA SDWIS data, Harmon County has a water quality grade of F (32.5/100). This indicates below-average compliance with significant violations. Residents may want to consider home water filtration or independent testing. The grade speaks to the public water system, not the watershed — for watershed-level concerns, see the Watershed Health zone. For the most up-to-date information, contact your local water utility or review your Consumer Confidence Report (CCR).
Does Harmon County have clean drinking water?
Harmon County has 2 health-based drinking water violations according to EPA records. With a water quality score of 32.5/100 and grade F, the county's drinking water has had some compliance issues but continues to be monitored. Note: drinking-water compliance speaks to the public water system, not necessarily to the watershed itself — check the Watershed Health zone for ATTAINS §303(d) data.
How does Harmon County rank for water quality in Oklahoma?
Harmon County ranks #11 out of 77 counties in Oklahoma by SDWIS water quality score (1 = best). With a score of 32.5/100, it falls in the top third of counties statewide. The ranking reflects EPA SDWIS compliance only — not watershed impairment, monitoring density, or streamflow, which are tracked separately on this page.

Counties with Similar Water Quality

Cimarron County

Oklahoma

F

32.4

Water score

Woods County

Oklahoma

F

33.0

Water score

Custer County

Oklahoma

F

31.6

Water score

Data Sources

Drinking-water compliance data from the EPA Safe Drinking Water Information System (SDWIS) via the ECHO enforcement database. Scores reflect compliance history and health-based violation counts.

Disclaimer: This data is informational only. It is not health, legal, or professional advice. For concerns about your specific water supply, contact your local water utility.

By Logan Johnson, Founder & Data EditorUpdated Reviewed by Logan Johnson, Founder & Data Editor

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