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County water report

Vigo County Water Report

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

Water grade

B

Water score

65.0

State rank

#25

of 92

Health violations

3

EPA SDWIS, 5-year lookback

Watershed impaired

28.4%

225 water bodies assessed

Monitoring sites

37

3,465 recent measurements

Live streamflow

99%

WABASH RIVER AT TERRE HAUTE, IN

Water at a glance

Key Water Indicators for Vigo County

EPA SDWIS

Safety Grade

B

Score: 65.0 / 100

EPA SDWIS

Active Violations

3

5-year health-based lookback

EPA ATTAINS

Watershed Health

28% impaired

225 bodies assessed

USGS NWIS

Streamflow Snapshot

99% of mean

WABASH RIVER AT TERRE HAUTE, IN

EPA WQP

Monitoring Sites

37

3,465 recent readings

Source: EPA SDWIS · Safe Drinking Water Information System

Drinking Water Compliance

Compliance grade

B

Based on EPA SDWIS compliance history.

Water score

Higher scores indicate cleaner recent compliance records.

65.0/100

Health violations

3

Health-based violations

Violations per 100K served

3.5

Population-normalized SDWIS rate

Editorial analysis

Understanding Vigo County’s Water

Drinking Water Quality Overview

EPA SDWIS

Vigo County earns a B grade for drinking water quality, scoring 65.0 out of 100. Over the past five years, EPA SDWIS records 3 health-based violations — a small cluster that warrants attention.

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 28.4% of assessed waterways carry an impairment designation (64 of 225 water bodies) across Vigo County's watersheds. The leading impairment causes are escherichia coli (e. coli) and biological integrity. Impairment does not mean tap water is unsafe — it measures ambient waterway conditions upstream of treatment, not finished drinking water.

River & Streamflow Status

USGS NWIS

USGS NWIS gauge data (as of 2026-05-14T14:30:00.000-04:00) puts WABASH RIVER at 11.5k cfs — near its historical average at 99% of mean flow. Streamflow is a leading indicator of drought stress, sediment load, and dilution capacity: low flows concentrate pollutants and warm water temperatures, stressing aquatic life and, in surface-water-dependent systems, the source water quality for treatment plants.

Monitoring Network

EPA WQP

EPA's Water Quality Portal (WQP) aggregates monitoring data from federal, state, and tribal agencies. Vigo County has moderate coverage with 37 active monitoring sites with 3,465 recent measurements on record. Predominant monitoring categories include physical and pfas,perfluorinated alkyl substance. More monitoring sites generally indicate greater scientific attention to local water conditions — and provide the baseline data that regulators use to set future impairment listings.

Editorial advisory

What the data suggests for Vigo County

Water Verdict

Vigo County, Indiana receives a fair water quality assessment with a grade of B and a score of 65.0 out of 100. The water supply meets baseline federal standards, but there may be periods of elevated contaminant levels or infrastructure concerns worth monitoring. Separately, EPA ATTAINS assessments cover 225 water bodies in the county's watershed, with 28.4% listed as impaired under the Clean Water Act — a source-water measure that is tracked independently of tap-water compliance. At the most recent USGS reading, local streamflow was tracking near its historical mean (99.3%).

Violation Context

EPA SDWIS records for Vigo County, Indiana show 3 health-based violations, indicating multiple instances where federal contaminant limits or treatment requirements were not met. At 3.5 violations per 100,000 people served, this rate is moderate and suggests recurring water quality challenges. For independent context, 3,465 water-quality monitoring results have been recorded across the county in the EPA Water Quality Portal over the past five years.

Consumer Guidance

Tap water in Vigo County scores well above average for drinking-water safety. Vigo County's drinking-water compliance score is 65.0 out of 100. With 3 recorded health violations, the water supply is generally reliable. The violation rate for Vigo County is 3.5 per 100,000 people served. Households with infants, pregnant individuals, or immunocompromised members may want to use an NSF 53-certified pitcher filter as a low-cost precaution. E. coli is the leading impairment cause in Vigo County's watershed. With 37 active water-quality monitoring sites in Vigo County, data coverage is strong. A pipeline streamflow snapshot from the WABASH RIVER gauge is also available on this page.

Regional Context

Vigo County has better water quality than the average county in Indiana. Its water score is 12.5 points higher than the state average, indicating stronger water system performance relative to 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 Vigo County's water environment

Watershed Impairment Causes (EPA ATTAINS)

  • 1

    E. coli (bacteria)

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

  • 2

    Biological Integrity

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

  • 3

    Pcbs in Fish Tissue

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

Source: EPA ATTAINS · Reporting cycle 2022

Official EPA Resources for Vigo County

EPA How's My Waterway

Interactive watershed health data for Vigo County

EPA ECHO: Drinking Water Systems

Search water utilities and violation records for Vigo County

Consumer Confidence Reports (IN)

Annual water quality reports from utilities in Indiana

Clean Water Act §303(d)

Watershed Health

Impaired Water Bodies

28.4%

64 of 225 assessed

Some impairment

Top Impairment Causes

  • 1

    ESCHERICHIA COLI (E. COLI)

  • 2

    BIOLOGICAL INTEGRITY

  • 3

    PCBS IN FISH TISSUE

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

37

Active in the past 5 years

Measurements Recorded

3.5K

3,465 total readings

Most Measured

  • Physical
  • PFAS,Perfluorinated Alkyl Substance
  • Inorganics, Minor, Metals

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

11.5Kcfs

May 14, 6:30 PM UTC

vs Long-Term Average

99%

Near typical

Primary Streamgage

WABASH RIVER AT TERRE HAUTE, IN

USGS site
03341500
Drainage area
12,265 sq mi
Long-term mean
11.6K 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; the percent-of-typical value compares the latest reading against that average.

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Estimate Your Water Costs

Water Cost Estimate

3

3 people  ·  ~225 gal/day

Annual Total

$558

Monthly

$47

Water Bill

$558/yr

Filter Cost

$0/yr

Safety Grade for Vigo 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 Vigo County, Indiana?
Vigo County, Indiana has a drinking-water quality grade of B with a score of 65.0/100, based on EPA SDWIS compliance data. The county has 3 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 Vigo County?
Vigo County has 3 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 Vigo County?
EPA ATTAINS assessments under Clean Water Act §303(d) indicate 28.4% of Vigo County's 225 assessed water bodies are classified as impaired (64 impaired). The top reported causes are ESCHERICHIA COLI (E. COLI), BIOLOGICAL INTEGRITY, PCBS IN FISH TISSUE. 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 Vigo County?
EPA's Water Quality Portal records 3,465 measurements from 37 monitoring sites in Vigo County over the past five years. The most frequently measured characteristic groups are Physical, PFAS,Perfluorinated Alkyl Substance, Inorganics, Minor, Metals. 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 Vigo County right now?
Vigo County's primary USGS streamgage on the WABASH RIVER has a pipeline snapshot of 11,500 cubic feet per second — 99% of the long-term mean of 11,577.91 cfs. Flow is within typical range for this gauge. For the latest gauge feed, visit waterdata.usgs.gov.
How does Vigo County water compare to the Indiana average?
Vigo County's SDWIS water quality score of 65.0/100 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 Vigo County?
Based on EPA SDWIS data, Vigo County has a water quality grade of B (65.0/100). This indicates good to excellent water quality with strong SDWIS compliance. 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 Vigo County have clean drinking water?
Vigo County has 3 health-based drinking water violations according to EPA records. With a water quality score of 65.0/100 and grade B, 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 Vigo County rank for water quality in Indiana?
Vigo County ranks #25 out of 92 counties in Indiana by SDWIS water quality score (1 = best). With a score of 65.0/100, 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

Allen County

Indiana

B

64.8

Water score

Daviess County

Indiana

B

64.4

Water score

Bartholomew County

Indiana

B

64.2

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.

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

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