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Federal water data

County water report

Berkeley County Water Report

Drinking-water compliance, watershed health, monitoring records, and river conditions for Berkeley County, West Virginia.

Water grade

C

Water score

59.9

State rank

#11

of 54

Health violations

6

EPA SDWIS, 5-year lookback

Watershed impaired

0.0%

3 water bodies assessed

Monitoring sites

54

26,117 recent measurements

Live streamflow

32%

OPEQUON CREEK NEAR MARTINSBURG, WV

Water at a glance

Key Water Indicators for Berkeley County

EPA SDWIS

Safety Grade

C

Score: 59.9 / 100

EPA SDWIS

Active Violations

6

5-year health-based lookback

EPA ATTAINS

Watershed Health

0% impaired

3 bodies assessed

USGS NWIS

Streamflow Snapshot

32% of mean

OPEQUON CREEK NEAR MARTINSBURG, WV

EPA WQP

Monitoring Sites

54

26,117 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.

59.9/100

Health violations

6

Health-based violations

Violations per 100K served

6.4

Population-normalized SDWIS rate

Editorial analysis

Understanding Berkeley County’s Water

Drinking Water Quality Overview

EPA SDWIS

Berkeley County's drinking water earned a C grade, scoring 59.9 out of 100. Over the past five years, EPA SDWIS records 6 health-based violations — a pattern that public water utilities are required to disclose and correct.

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). None of the assessed waterways are listed as impaired (0 of 3 water bodies) across Berkeley County's watersheds. 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 2026-05-14T15:00:00.000-04:00) puts OPEQUON CREEK at 80.6 cfs — well below its long-term average at 32% 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. Berkeley County has extensive coverage with 54 active monitoring sites with 26,117 recent measurements on record. Predominant monitoring categories include physical and nutrient. 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 Berkeley County

Water Verdict

Berkeley County receives a fair water quality assessment with a grade of C and a score of 59.9 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

Berkeley County has recorded 6 health-based violations, indicating multiple instances where federal contaminant limits or treatment requirements were not met. At 6.4 violations per 100,000 people served, this rate is moderate and suggests recurring water quality challenges.

Consumer Guidance

Tap water in Berkeley County meets baseline standards but the compliance record shows room for improvement, with a Grade C rating. Berkeley County's drinking-water compliance score is 59.9 out of 100. The violation rate for Berkeley County is 6.4 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 54 active water-quality monitoring sites in Berkeley County, data coverage is strong. A pipeline streamflow snapshot from the OPEQUON CREEK gauge is also available on this page.

Regional Context

Berkeley County has better water quality than the average county in West Virginia. Its water score is 24.7 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 Berkeley County's water environment

Official EPA Resources for Berkeley County

EPA How's My Waterway

Interactive watershed health data for Berkeley County

EPA ECHO: Drinking Water Systems

Search water utilities and violation records for Berkeley County

Consumer Confidence Reports (WV)

Annual water quality reports from utilities in West Virginia

Clean Water Act §303(d)

Watershed Health

Impaired Water Bodies

0.0%

0 of 3 assessed

Mostly healthy

Top Impairment Causes

No specific impairment causes reported for the assessed water bodies in this county.

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

54

Active in the past 5 years

Measurements Recorded

26K

26,117 total readings

Most Measured

  • Physical
  • Nutrient
  • 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

80.6cfs

May 14, 7:00 PM UTC

vs Long-Term Average

32%

Well below typical

Primary Streamgage

OPEQUON CREEK NEAR MARTINSBURG, WV

USGS site
01616500
Drainage area
272 sq mi
Long-term mean
249 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 Berkeley 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 Berkeley County, West Virginia?
Berkeley County, West Virginia has a drinking-water quality grade of C with a score of 59.9/100, based on EPA SDWIS compliance data. The county has 6 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 Berkeley County?
Berkeley County has 6 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 Berkeley County?
EPA ATTAINS assessments under Clean Water Act §303(d) indicate 0.0% of Berkeley County's 3 assessed water bodies are classified as impaired (0 impaired). 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 Berkeley County?
EPA's Water Quality Portal records 26,117 measurements from 54 monitoring sites in Berkeley County over the past five years. The most frequently measured characteristic groups are Physical, Nutrient, 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 Berkeley County right now?
Berkeley County's primary USGS streamgage on the OPEQUON CREEK has a pipeline snapshot of 80.6 cubic feet per second — 32% of the long-term mean of 249.39 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 Berkeley County water compare to the West Virginia average?
Berkeley County's SDWIS water quality score of 59.9/100 is higher than the West Virginia state average of 35.2. The average water quality grade across West Virginia is F, based on data from 54 counties with available SDWIS data.
Is tap water safe to drink in Berkeley County?
Based on EPA SDWIS data, Berkeley County has a water quality grade of C (59.9/100). 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).
Why does Berkeley County have so many water violations?
Berkeley County has 6 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 Berkeley County rank for water quality in West Virginia?
Berkeley County ranks #11 out of 54 counties in West Virginia by SDWIS water quality score (1 = best). With a score of 59.9/100, 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

Taylor County

West Virginia

C

60.6

Water score

Monongalia County

West Virginia

C

57.5

Water score

Braxton County

West Virginia

C

55.0

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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