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EPA SDWIS

Perry County Water Quality

Perry County, Indiana

Water Grade

C

Water Score

53.9

Violations

2

State Rank

#44

of 92 (1 = best)

EPA SDWIS Compliance

Drinking Water Quality

Water Quality Grade

C

Based on EPA compliance history and violation data

Water Score

53.9/100

Higher = better quality

Health Violations

2

Health-based violations

Violation Rate

11.4%

Systems with violations

Water Advisory: Perry County

Water Verdict

Perry County receives a below-average water quality assessment with a grade of C and a score of 53.9 out of 100. Residents should review their utility's Consumer Confidence Report and may want to consider additional water filtration for drinking.

Violation Context

Perry County has recorded 2 health-based violations, indicating multiple instances where federal contaminant limits or treatment requirements were not met. At 11.4 violations per 1,000 residents, this rate is high and signals significant water quality management issues.

Consumer Guidance

Tap water in Perry County meets baseline standards, but residents who are immunocompromised or have young children may want to use an NSF-certified water filter as a precaution. 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

Perry County has water quality close to the average county in Indiana. Its water score is within 1.4 points of the state average, meaning its overall water system performance is broadly representative of Indiana as a whole.

Clean Water Act §303(d)

Watershed Health

Impaired Water Bodies

19.5%

50 of 256 assessed

Some impairment

Top Impairment Causes

  • 1

    ESCHERICHIA COLI (E. COLI)

  • 2

    BIOLOGICAL INTEGRITY

  • 3

    DISSOLVED OXYGEN

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.

Past 5 years

Water Quality Monitoring

Monitoring Sites

7

Active in the past 5 years

Measurements Recorded

14K

13,593 total readings

Most Measured

  • Organics, Pesticide
  • Physical
  • Nutrient

Categories measured most frequently

Data from the EPA Water Quality Portal (WQP), aggregating monitoring records from federal, state, and tribal sources. Each measurement represents a single sample analyzed for a specific characteristic (e.g., E. coli, pH, dissolved oxygen, nitrogen).

Live USGS Streamgage

River & Stream Conditions

Current Discharge

107.0Kcfs

May 14, 5:00 PM UTC

vs Long-Term Average

79%

Below typical

Primary Streamgage

OHIO RIVER AT CANNELTON DAM AT CANNELTON, IN

USGS site
03303280
Drainage area
97,000 sq mi
Long-term mean
135.8K cfs

One representative streamgage (the one with the largest drainage area in the county). Many counties have multiple gauges — this view summarizes the primary one. The long-term mean is the full-record annual average; "% of typical" compares the latest reading against that average.

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Frequently Asked Questions

What is the water quality in Perry County, Indiana?
Perry County, Indiana has a drinking-water quality grade of C with a score of 53.9/100, 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 Perry County?
Perry 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 healthy are the watersheds in Perry County?
EPA ATTAINS assessments under Clean Water Act §303(d) indicate 19.5% of Perry County's 256 assessed water bodies are classified as impaired (50 impaired). The top reported causes are ESCHERICHIA COLI (E. COLI), BIOLOGICAL INTEGRITY, DISSOLVED OXYGEN. 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 much water-quality monitoring happens in Perry County?
EPA's Water Quality Portal records 13,593 measurements from 7 monitoring sites in Perry County over the past five years. The most frequently measured characteristic groups are Organics, Pesticide, Physical, Nutrient. Each measurement is a single sample analyzed for one characteristic (E. coli, pH, dissolved oxygen, etc.). High monitoring density means more scientific evidence behind any reported signal — it does not by itself indicate water quality.
What's happening with rivers in Perry County right now?
Perry County's primary USGS streamgage on the OHIO RIVER is currently reading 107,000 cubic feet per second — 79% of the long-term mean of 135,838.57 cfs. Flow is within typical range for this gauge. For genuine real-time data, visit waterdata.usgs.gov.
How does Perry County water compare to the Indiana average?
Perry County's SDWIS water quality score of 53.9/100 is higher 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 Perry County?
Based on EPA SDWIS data, Perry County has a water quality grade of C (53.9/100). This indicates moderate compliance. Some violations have been recorded but overall standards are maintained. 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 Perry County have clean drinking water?
Perry County has 2 health-based drinking water violations according to EPA records. With a water quality score of 53.9/100 and grade C, 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 Perry County rank for water quality in Indiana?
Perry County ranks #44 out of 92 counties in Indiana by SDWIS water quality score (1 = best). With a score of 53.9/100, it falls in the middle 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

Hamilton County

Indiana

C

53.6

Water score

Clark County

Indiana

C

53.5

Water score

Spencer County

Indiana

C

54.3

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, EPA-finalized.

Water-quality monitoring counts from the EPA Water Quality Portal (WQP) — federated USGS, EPA, and state agency sampling records over a rolling 5-year window.

Live streamflow from the USGS National Water Information System (NWIS) — continuous discharge measurements from the largest-drainage gauge in each county, compared against the full-record long-term annual mean.

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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