waterbycounty
Federal water data

County water report

Park County Water Report

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

Water grade

C

Water score

59.0

State rank

#3

of 23

Health violations

2

EPA SDWIS, 5-year lookback

Watershed impaired

Not reported

EPA ATTAINS coverage varies by state

Monitoring sites

41

10,676 recent measurements

Live streamflow

373%

NORTH FORK SHOSHONE RIVER AT WAPITI, WY

Water at a glance

Key Water Indicators for Park County

EPA SDWIS

Safety Grade

C

Score: 59.0 / 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

373% of mean

NORTH FORK SHOSHONE RIVER AT WAPITI, WY

EPA WQP

Monitoring Sites

41

10,676 recent readings

Source: EPA SDWIS · Safe Drinking Water Information System

Drinking Water Compliance

Compliance grade

C

Based on EPA SDWIS compliance history.

Water score

Higher scores indicate cleaner recent compliance records.

59.0/100

Health violations

2

Health-based violations

Violations per 100K served

7.2

Population-normalized SDWIS rate

Editorial analysis

Understanding Park County’s Water

Drinking Water Quality Overview

EPA SDWIS

Park County's drinking water earned a C grade, scoring 59.0 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 2026-05-14T12:15:00.000-06:00) puts NORTH FORK SHOSHONE RIVER at 3.3k cfs — running significantly above its long-term average at 373% 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. Park County has moderate coverage with 41 active monitoring sites with 10,676 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 Park County

Water Verdict

Park County receives a fair water quality assessment with a grade of C and a score of 59.0 out of 100. The water supply meets baseline federal standards, but there may be periods of elevated contaminant levels or infrastructure concerns worth monitoring.

Violation Context

Park County has recorded 2 health-based violations, indicating multiple instances where federal contaminant limits or treatment requirements were not met. At 7.2 violations per 100,000 people served, this rate is moderate and suggests recurring water quality challenges.

Consumer Guidance

Tap water in Park County meets baseline standards but the compliance record shows room for improvement, with a Grade C rating. Park County's drinking-water compliance score is 59.0 out of 100. The violation rate for Park County is 7.2 per 100,000 people served. Residents who are immunocompromised, pregnant, or have young children may benefit from using an NSF 53-certified filter. Contacting your local utility for the current Consumer Confidence Report will confirm which specific violations were recorded and whether they have been resolved. With 41 active water-quality monitoring sites in Park County, data coverage is strong. A pipeline streamflow snapshot from the NORTH FORK SHOSHONE RIVER gauge is also available on this page.

Regional Context

Park County has better water quality than the average county in Wyoming. Its water score is 22.4 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 Park County's water environment

Official EPA Resources for Park County

EPA How's My Waterway

Interactive watershed health data for Park County

EPA ECHO: Drinking Water Systems

Search water utilities and violation records for Park County

Consumer Confidence Reports (WY)

Annual water quality reports from utilities in Wyoming

Past 5 years

Water Quality Monitoring

Monitoring Sites

41

Active in the past 5 years

Measurements Recorded

11K

10,676 total readings

Most Measured

  • Physical
  • Inorganics, Minor, Metals
  • Sediment

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

3,300cfs

May 14, 6:15 PM UTC

vs Long-Term Average

373%

Well above typical

Primary Streamgage

NORTH FORK SHOSHONE RIVER AT WAPITI, WY

USGS site
06279940
Drainage area
700 sq mi
Long-term mean
884 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 Park 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.

Try the full calculator →

Improve your water quality at home

Berkey filters remove 99.9%+ of contaminants from tap water.

Shop Berkey →

Sponsored

Test your tap water

Tap Score provides professional mail-in water testing.

Get Tested →

Frequently Asked Questions

What is the water quality in Park County, Wyoming?
Park County, Wyoming has a drinking-water quality grade of C with a score of 59.0/100, 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 Park County?
Park 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 Park County?
EPA's Water Quality Portal records 10,676 measurements from 41 monitoring sites in Park County over the past five years. The most frequently measured characteristic groups are Physical, Inorganics, Minor, Metals, Sediment. 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 Park County right now?
Park County's primary USGS streamgage on the NORTH FORK SHOSHONE RIVER has a pipeline snapshot of 3,300 cubic feet per second — 373% of the long-term mean of 884.16 cfs. This is well above typical — often a signal of recent precipitation or storm runoff. For the latest gauge feed, visit waterdata.usgs.gov.
How does Park County water compare to the Wyoming average?
Park County's SDWIS water quality score of 59.0/100 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 Park County?
Based on EPA SDWIS data, Park County has a water quality grade of C (59.0/100). 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 Park County have clean drinking water?
Park County has 2 health-based drinking water violations according to EPA records. With a water quality score of 59.0/100 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 Park County rank for water quality in Wyoming?
Park County ranks #3 out of 23 counties in Wyoming by SDWIS water quality score (1 = best). With a score of 59.0/100, 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

Sheridan County

Wyoming

C

58.4

Water score

Campbell County

Wyoming

C

52.9

Water score

Albany County

Wyoming

B

66.2

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.

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

Explore more data for Park County

Property TaxCost of LivingCrime RateIncomeHealthSchoolsDisaster RiskWeatherCounty Score