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County water report

Converse County Water Report

Drinking-water compliance, watershed health, monitoring records, and river conditions for Converse County, Wyoming.

Water grade

D

Water score

47.9

State rank

#6

of 23

Health violations

2

EPA SDWIS, 5-year lookback

Watershed impaired

Not reported

EPA ATTAINS coverage varies by state

Monitoring sites

1

1,057 recent measurements

Live streamflow

26%

NORTH PLATTE RIVER AT ORIN, WY

Water at a glance

Key Water Indicators for Converse County

EPA SDWIS

Safety Grade

D

Score: 47.9 / 100

EPA SDWIS

Active Violations

2

5-year health-based lookback

EPA ATTAINS

Watershed Health

Not reported

Coverage varies by state

USGS NWIS

Streamflow Snapshot

26% of mean

NORTH PLATTE RIVER AT ORIN, WY

EPA WQP

Monitoring Sites

1

1,057 recent readings

Source: EPA SDWIS · Safe Drinking Water Information System

Drinking Water Compliance

Compliance grade

D

Based on EPA SDWIS compliance history.

Water score

Higher scores indicate cleaner recent compliance records.

47.9/100

Health violations

2

Health-based violations

Violations per 100K served

19.3

Population-normalized SDWIS rate

Editorial analysis

Understanding Converse County’s Water

Drinking Water Quality Overview

EPA SDWIS

Converse County's drinking water received a D grade, scoring 47.9 out of 100. Over the past five years, EPA SDWIS records 2 health-based violations — a small cluster that warrants attention.

River & Streamflow Status

USGS NWIS

USGS NWIS gauge data (as of 2026-05-14T12:45:00.000-06:00) puts NORTH PLATTE RIVER at 418.0 cfs — well below its long-term average at 26% of mean — low-flow conditions worth noting for water-dependent ecosystems. 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. Converse County has limited coverage with 1 active monitoring site with 1,057 recent measurements on record. Predominant monitoring categories include physical and inorganics, minor, metals. 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 Converse County

Water Verdict

Converse County, Wyoming receives a below-average water quality assessment with a grade of D and a score of 47.9 out of 100. Residents should review their utility's Consumer Confidence Report and may want to consider additional water filtration for drinking. The county's primary USGS gauge drains roughly 15,025 square miles of upstream watershed, giving local source waters a regional footprint. At the most recent USGS reading, local streamflow was below its historical mean at 26.3% — worth watching in drier seasons.

Violation Context

EPA SDWIS records for Converse County, Wyoming show 2 health-based violations, indicating multiple instances where federal contaminant limits or treatment requirements were not met. At 19.3 violations per 100,000 people served, this rate is high and signals significant water quality management issues. For independent context, 1,057 water-quality monitoring results have been recorded across the county in the EPA Water Quality Portal over the past five years.

Consumer Guidance

Converse County's drinking-water compliance is below average with a Grade D, indicating repeated or unresolved violations in the recent record. Converse County's drinking-water compliance score is 47.9 out of 100. The violation rate for Converse County is 19.3 per 100,000 people served. Residents are encouraged to use an NSF 53 or NSF 58-certified filter for drinking and cooking water until the underlying violations are resolved. Running tap water for 30 seconds before use and avoiding older lead-pipe connections can also reduce exposure risk. The current Consumer Confidence Report from your utility will specify the contaminants of concern. There is 1 active water-quality monitoring site in Converse County. A pipeline streamflow snapshot from the NORTH PLATTE RIVER gauge is also available on this page.

Regional Context

Converse County has better water quality than the average county in Wyoming. Its water score is 11.3 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 Converse County's water environment

Official EPA Resources for Converse County

EPA How's My Waterway

Interactive watershed health data for Converse County

EPA ECHO: Drinking Water Systems

Search water utilities and violation records for Converse County

Consumer Confidence Reports (WY)

Annual water quality reports from utilities in Wyoming

Past 5 years

Water Quality Monitoring

Monitoring Sites

1

Active in the past 5 years

Measurements Recorded

1.1K

1,057 total readings

Most Measured

  • Physical
  • Inorganics, Minor, Metals
  • 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

418cfs

May 14, 6:45 PM UTC

vs Long-Term Average

26%

Well below typical

Primary Streamgage

NORTH PLATTE RIVER AT ORIN, WY

USGS site
06652000
Drainage area
15,025 sq mi
Long-term mean
1,590 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.

Free tool

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 Converse County:D — Poor

Elevated violations or significant watershed impairment.

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 Converse County, Wyoming?
Converse County, Wyoming has a drinking-water quality grade of D with a score of 47.9/100, 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 streamflow snapshots are reported separately on this page.
Are there any water violations in Converse County?
Converse 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 much water-quality monitoring happens in Converse County?
EPA's Water Quality Portal records 1,057 measurements from 1 monitoring sites in Converse County over the past five years. The most frequently measured characteristic groups are Physical, Inorganics, Minor, Metals, 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 Converse County right now?
Converse County's primary USGS streamgage on the NORTH PLATTE RIVER has a pipeline snapshot of 418 cubic feet per second — 26% of the long-term mean of 1,589.9 cfs. This is well below typical — often a signal of drought stress on source water. For the latest gauge feed, visit waterdata.usgs.gov.
How does Converse County water compare to the Wyoming average?
Converse County's SDWIS water quality score of 47.9/100 is higher than the Wyoming state average of 36.6. The average water quality grade across Wyoming is F, based on data from 23 counties with available SDWIS data.
Is tap water safe to drink in Converse County?
Based on EPA SDWIS data, Converse County has a water quality grade of D (47.9/100). 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 Converse County have clean drinking water?
Converse County has 2 health-based drinking water violations according to EPA records. With a water quality score of 47.9/100 and grade D, 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 Converse County rank for water quality in Wyoming?
Converse County ranks #6 out of 23 counties in Wyoming by SDWIS water quality score (1 = best). With a score of 47.9/100, 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

Laramie County

Wyoming

D

46.7

Water score

Hot Springs County

Wyoming

D

44.6

Water score

Sweetwater County

Wyoming

D

43.8

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.

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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