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Federal water data

County water report

Ohio County Water Report

Drinking-water compliance, watershed health, monitoring records, and river conditions for Ohio County, Indiana.

Water grade

F

Water score

32.4

State rank

#73

of 92

Health violations

4

EPA SDWIS, 5-year lookback

Watershed impaired

27.3%

44 water bodies assessed

Monitoring sites

N/A

EPA Water Quality Portal

Live streamflow

No gauge

Primary USGS station not mapped

Water at a glance

Key Water Indicators for Ohio County

EPA SDWIS

Safety Grade

F

Score: 32.4 / 100

EPA SDWIS

Active Violations

4

5-year health-based lookback

EPA ATTAINS

Watershed Health

27% impaired

44 bodies assessed

USGS NWIS

Streamflow Snapshot

No gauge

Primary USGS gauge not mapped

EPA WQP

Monitoring Sites

N/A

Rolling 5-year window

Source: EPA SDWIS · Safe Drinking Water Information System

Drinking Water Compliance

Compliance grade

F

Based on EPA SDWIS compliance history.

Water score

Higher scores indicate cleaner recent compliance records.

32.4/100

Health violations

4

Health-based violations

Violations per 100K served

55.7

Population-normalized SDWIS rate

Editorial analysis

Understanding Ohio County’s Water

Drinking Water Quality Overview

EPA SDWIS

Ohio County's water systems carry a failing grade, scoring 32.4 out of 100. Over the past five years, EPA SDWIS records 4 health-based violations — a pattern that public water utilities are required to disclose and correct.

Watershed Conditions

EPA ATTAINS

Under the Clean Water Act §303(d), EPA ATTAINS tracks whether waterways meet quality standards for drinking, recreation, and aquatic life (reporting cycle: 2022). A notable 27.3% of assessed waterways carry an impairment designation (12 of 44 water bodies) across Ohio County's watersheds. The leading impairment causes are escherichia coli (e. coli) and mercury in fish tissue. Impairment does not mean tap water is unsafe — it measures ambient waterway conditions upstream of treatment, not finished drinking water.

Editorial advisory

What the data suggests for Ohio County

Water Verdict

Ohio County, Indiana receives a poor water quality assessment with a grade of F and a score of 32.4 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. Separately, EPA ATTAINS assessments cover 44 water bodies in the county's watershed, with 27.3% listed as impaired under the Clean Water Act — a source-water measure that is tracked independently of tap-water compliance.

Violation Context

EPA SDWIS records for Ohio County, Indiana show 4 health-based violations, indicating multiple instances where federal contaminant limits or treatment requirements were not met. At 55.7 violations per 100,000 people served, this rate is high and signals significant water quality management issues. The most recent Clean Water Act assessment cycle on file for the county's watershed is 2022.

Consumer Guidance

Drinking-water compliance in Ohio County is rated Grade F, reflecting significant health-based violations in the recent reporting period. Ohio County's drinking-water compliance score is 32.4 out of 100. The violation rate for Ohio County is 55.7 per 100,000 people served. An NSF 53 or NSF 58-certified filter is recommended for drinking and cooking water. Check the Consumer Confidence Report from your utility to identify the specific contaminants and required corrective actions — utilities are legally required to notify customers of violations. E. coli is the leading impairment cause in Ohio County's watershed.

Regional Context

Ohio County has poorer water quality than the average county in Indiana. Its water score is 20.1 points lower than the state average, suggesting more challenges with contamination control or infrastructure than neighboring counties.

Advisory text summarizes county-level public records and is not a replacement for your utility's current Consumer Confidence Report or direct local notices.

Contaminants & Resources

Key issues flagged in Ohio County's water environment

Watershed Impairment Causes (EPA ATTAINS)

  • 1

    E. coli (bacteria)

    Impairment cause per EPA Clean Water Act §303(d) assessment

  • 2

    Mercury (fish tissue)

    Impairment cause per EPA Clean Water Act §303(d) assessment

  • 3

    Biological Integrity

    Impairment cause per EPA Clean Water Act §303(d) assessment

Source: EPA ATTAINS · Reporting cycle 2022

Official EPA Resources for Ohio County

EPA How's My Waterway

Interactive watershed health data for Ohio County

EPA ECHO: Drinking Water Systems

Search water utilities and violation records for Ohio County

Consumer Confidence Reports (IN)

Annual water quality reports from utilities in Indiana

Clean Water Act §303(d)

Watershed Health

Impaired Water Bodies

27.3%

12 of 44 assessed

Some impairment

Top Impairment Causes

  • 1

    ESCHERICHIA COLI (E. COLI)

  • 2

    MERCURY IN FISH TISSUE

  • 3

    BIOLOGICAL INTEGRITY

Source: EPA ATTAINS · Reporting cycle 2022

Impairment is determined under the Clean Water Act §303(d): a water body is impaired when it fails to meet state-defined quality standards for designated uses (drinking, recreation, aquatic life). Assessment coverage varies by state; counties without assessed water bodies are not shown.

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Safety Grade for Ohio County:C — Moderate

Some violations or watershed impairment detected.

Estimates use the national average residential water rate ($0.0068/gal, EPA/AWWA 2023) and EPA WaterSense per-person consumption baseline (75 gal/person/day). Actual bills vary by utility, usage tier, and local infrastructure fees. For informational purposes only.

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Frequently Asked Questions

What is the water quality in Ohio County, Indiana?
Ohio County, Indiana has a drinking-water quality grade of F with a score of 32.4/100, based on EPA SDWIS compliance data. The county has 4 health-based drinking water violations over the past 5 years. Watershed health, monitoring records, and streamflow snapshots are reported separately on this page.
Are there any water violations in Ohio County?
Ohio County has 4 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 healthy are the watersheds in Ohio County?
EPA ATTAINS assessments under Clean Water Act §303(d) indicate 27.3% of Ohio County's 44 assessed water bodies are classified as impaired (12 impaired). The top reported causes are ESCHERICHIA COLI (E. COLI), MERCURY IN FISH TISSUE, BIOLOGICAL INTEGRITY. Impairment means the water body fails to meet state quality standards for at least one designated use — drinking water source, recreation, aquatic life, or fish consumption. Note: watershed impairment doesn't always translate to tap-water issues; treatment plants can remove most regulated contaminants.
How does Ohio County water compare to the Indiana average?
Ohio County's SDWIS water quality score of 32.4/100 is lower than the Indiana state average of 52.5. The average water quality grade across Indiana is D, based on data from 92 counties with available SDWIS data.
Is tap water safe to drink in Ohio County?
Based on EPA SDWIS data, Ohio County has a water quality grade of F (32.4/100). 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 Ohio County have clean drinking water?
Ohio County has 4 health-based drinking water violations according to EPA records. With a water quality score of 32.4/100 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 Ohio County rank for water quality in Indiana?
Ohio County ranks #73 out of 92 counties in Indiana by SDWIS water quality score (1 = best). With a score of 32.4/100, it falls in the bottom 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

Jennings County

Indiana

F

32.8

Water score

Jasper County

Indiana

F

31.8

Water score

White County

Indiana

F

31.4

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.

Watershed health and impaired-waterway data from the EPA ATTAINS Clean Water Act §303(d) assessments, state-reported and EPA-finalized.

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 Evan Brooks, Data EditorUpdated Reviewed by Evan Brooks, Data Editor

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