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Federal water data

County water report

Wyoming County Water Report

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

Water grade

F

Water score

36.8

State rank

#34

of 57

Health violations

9

EPA SDWIS, 5-year lookback

Watershed impaired

Not reported

EPA ATTAINS coverage varies by state

Monitoring sites

7

2,166 recent measurements

Live streamflow

176%

GENESEE RIVER AT PORTAGEVILLE NY

Water at a glance

Key Water Indicators for Wyoming County

EPA SDWIS

Safety Grade

F

Score: 36.8 / 100

EPA SDWIS

Active Violations

9

5-year health-based lookback

EPA ATTAINS

Watershed Health

Not reported

Coverage varies by state

USGS NWIS

Streamflow Snapshot

176% of mean

GENESEE RIVER AT PORTAGEVILLE NY

EPA WQP

Monitoring Sites

7

2,166 recent readings

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.

36.8/100

Health violations

9

Health-based violations

Violations per 100K served

41.0

Population-normalized SDWIS rate

Editorial analysis

Understanding Wyoming County’s Water

Drinking Water Quality Overview

EPA SDWIS

Wyoming County's water systems carry a failing grade, scoring 36.8 out of 100. Over the past five years, EPA SDWIS records 9 health-based violations — a pattern that public water utilities are required to disclose and correct.

River & Streamflow Status

USGS NWIS

USGS NWIS gauge data (as of 2026-05-14T14:00:00.000-05:00) puts GENESEE RIVER at 2.3k cfs — running significantly above its long-term average at 176% 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. Wyoming County has limited coverage with 7 active monitoring sites with 2,166 recent measurements on record. Predominant monitoring categories include organics, pesticide and organics, other. 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 Wyoming County

Water Verdict

Wyoming County receives a poor water quality assessment with a grade of F and a score of 36.8 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.

Violation Context

Wyoming County has recorded 9 health-based violations, indicating multiple instances where federal contaminant limits or treatment requirements were not met. At 41.0 violations per 100,000 people served, this rate is high and signals significant water quality management issues.

Consumer Guidance

Drinking-water compliance in Wyoming County is rated Grade F, reflecting significant health-based violations in the recent reporting period. Wyoming County's drinking-water compliance score is 36.8 out of 100. The violation rate for Wyoming County is 41.0 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. There are 7 active water-quality monitoring sites in Wyoming County. A pipeline streamflow snapshot from the GENESEE RIVER gauge is also available on this page.

Regional Context

Wyoming County has water quality close to the average county in New York. Its water score is within 3.3 points of the state average, meaning its overall water system performance is broadly representative of New York as a whole.

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 Wyoming County's water environment

Official EPA Resources for Wyoming County

EPA How's My Waterway

Interactive watershed health data for Wyoming County

EPA ECHO: Drinking Water Systems

Search water utilities and violation records for Wyoming County

Consumer Confidence Reports (NY)

Annual water quality reports from utilities in New York

Past 5 years

Water Quality Monitoring

Monitoring Sites

7

Active in the past 5 years

Measurements Recorded

2.2K

2,166 total readings

Most Measured

  • Organics, Pesticide
  • Organics, Other
  • 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

2,280cfs

May 14, 7:00 PM UTC

vs Long-Term Average

176%

Well above typical

Primary Streamgage

GENESEE RIVER AT PORTAGEVILLE NY

USGS site
04223000
Drainage area
984 sq mi
Long-term mean
1,295 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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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 Wyoming County:F — Failing

High violation count or severe watershed conditions.

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 Wyoming County, New York?
Wyoming County, New York has a drinking-water quality grade of F with a score of 36.8/100, based on EPA SDWIS compliance data. The county has 9 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 Wyoming County?
Wyoming County has 9 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 Wyoming County?
EPA's Water Quality Portal records 2,166 measurements from 7 monitoring sites in Wyoming County over the past five years. The most frequently measured characteristic groups are Organics, Pesticide, Organics, Other, 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 Wyoming County right now?
Wyoming County's primary USGS streamgage on the GENESEE RIVER has a pipeline snapshot of 2,280 cubic feet per second — 176% of the long-term mean of 1,294.59 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 Wyoming County water compare to the New York average?
Wyoming County's SDWIS water quality score of 36.8/100 is lower than the New York state average of 40.1. The average water quality grade across New York is D, based on data from 57 counties with available SDWIS data.
Is tap water safe to drink in Wyoming County?
Based on EPA SDWIS data, Wyoming County has a water quality grade of F (36.8/100). 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).
Why does Wyoming County have so many water violations?
Wyoming County has 9 health-based drinking water violations on record from the EPA SDWIS database. A higher violation count can result from aging infrastructure, underfunded water utilities, agricultural runoff contamination, or industrial pollution. Counties with more water systems may also see more violations simply due to scale. Residents concerned about water quality should consider independent water testing and home filtration systems.
How does Wyoming County rank for water quality in New York?
Wyoming County ranks #34 out of 57 counties in New York by SDWIS water quality score (1 = best). With a score of 36.8/100, 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

Cattaraugus County

New York

F

37.2

Water score

Albany County

New York

F

37.4

Water score

Madison County

New York

F

38.3

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.

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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