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Federal water data

County water report

Cumberland County Water Report

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

Water grade

F

Water score

30.4

State rank

#19

of 21

Health violations

63

EPA SDWIS, 5-year lookback

Watershed impaired

85.7%

7 water bodies assessed

Monitoring sites

304

33,689 recent measurements

Live streamflow

54%

Cohansey River at Seeley NJ

Water at a glance

Key Water Indicators for Cumberland County

EPA SDWIS

Safety Grade

F

Score: 30.4 / 100

EPA SDWIS

Active Violations

63

5-year health-based lookback

EPA ATTAINS

Watershed Health

86% impaired

7 bodies assessed

USGS NWIS

Streamflow Snapshot

54% of mean

Cohansey River at Seeley NJ

EPA WQP

Monitoring Sites

304

33,689 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.

30.4/100

Health violations

63

Health-based violations

Violations per 100K served

65.2

Population-normalized SDWIS rate

Editorial analysis

Understanding Cumberland County’s Water

Drinking Water Quality Overview

EPA SDWIS

Cumberland County's water systems carry a failing grade, scoring 30.4 out of 100. Over the past five years, EPA SDWIS records 63 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). A large majority — 85.7% — of assessed waterways are impaired (6 of 7 water bodies) across Cumberland County's watersheds. The leading impairment causes are fecal coliform and enterococcus. 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 2026-05-14T14:15:00.000-04:00) puts Cohansey River at 20.8 cfs — well below its long-term average at 54% 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. Cumberland County has extensive coverage with 304 active monitoring sites with 33,689 recent measurements on record. Predominant monitoring categories include physical and microbiological. 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 Cumberland County

Water Verdict

Cumberland County, New Jersey receives a poor water quality assessment with a grade of F and a score of 30.4 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. Separately, EPA ATTAINS assessments cover 7 water bodies in the county's watershed, with 85.7% 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 below its historical mean at 53.6% — worth watching in drier seasons.

Violation Context

EPA SDWIS records for Cumberland County, New Jersey show 63 health-based violations, indicating multiple instances where federal contaminant limits or treatment requirements were not met. At 65.2 violations per 100,000 people served, this rate is high and signals significant water quality management issues. This compliance record sits alongside an unusually deep monitoring archive: 33,689 water-quality results have been logged across the county in the EPA Water Quality Portal over the past five years.

Consumer Guidance

Cumberland County has a Grade F compliance record with 63 health-based violations — among the highest levels in the country. Cumberland County's drinking-water compliance score is 30.4 out of 100. The violation rate for Cumberland County is 65.2 per 100,000 people served. Residents are strongly advised to use a certified NSF 58 reverse-osmosis filter or bottled water for all drinking and cooking until violations are corrected. Contacting the New Jersey Department of Environmental Quality or Health can expedite utility compliance action. Fecal Coliform is the leading impairment cause in Cumberland County's watershed. With 304 active water-quality monitoring sites in Cumberland County, data coverage is strong. A pipeline streamflow snapshot from the Cohansey River gauge is also available on this page.

Regional Context

Cumberland County has poorer water quality than the average county in New Jersey. Its water score is 25.3 points lower than the state average, suggesting more challenges with contamination control or infrastructure than 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 Cumberland County's water environment

Watershed Impairment Causes (EPA ATTAINS)

  • 1

    Fecal coliform bacteria

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

  • 2

    Enterococcus bacteria

    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 Cumberland County

EPA How's My Waterway

Interactive watershed health data for Cumberland County

EPA ECHO: Drinking Water Systems

Search water utilities and violation records for Cumberland County

Consumer Confidence Reports (NJ)

Annual water quality reports from utilities in New Jersey

Clean Water Act §303(d)

Watershed Health

Impaired Water Bodies

85.7%

6 of 7 assessed

High concern

Top Impairment Causes

  • 1

    FECAL COLIFORM

  • 2

    ENTEROCOCCUS

  • 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

304

Active in the past 5 years

Measurements Recorded

34K

33,689 total readings

Most Measured

  • Physical
  • Microbiological
  • PFAS,Perfluorinated Alkyl Substance

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

20.8cfs

May 14, 6:15 PM UTC

vs Long-Term Average

54%

Well below typical

Primary Streamgage

Cohansey River at Seeley NJ

USGS site
01412800
Drainage area
28 sq mi
Long-term mean
38.8 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

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Annual Total

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Monthly

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Water Bill

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Filter Cost

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Safety Grade for Cumberland 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 Cumberland County, New Jersey?
Cumberland County, New Jersey has a drinking-water quality grade of F with a score of 30.4/100, based on EPA SDWIS compliance data. The county has 63 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 Cumberland County?
Cumberland County has 63 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 Cumberland County?
EPA ATTAINS assessments under Clean Water Act §303(d) indicate 85.7% of Cumberland County's 7 assessed water bodies are classified as impaired (6 impaired). The top reported causes are FECAL COLIFORM, ENTEROCOCCUS, 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 Cumberland County?
EPA's Water Quality Portal records 33,689 measurements from 304 monitoring sites in Cumberland County over the past five years. The most frequently measured characteristic groups are Physical, Microbiological, PFAS,Perfluorinated Alkyl Substance. 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 Cumberland County right now?
Cumberland County's primary USGS streamgage on the Cohansey River has a pipeline snapshot of 20.8 cubic feet per second — 54% of the long-term mean of 38.8 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 Cumberland County water compare to the New Jersey average?
Cumberland County's SDWIS water quality score of 30.4/100 is lower than the New Jersey state average of 55.7. The average water quality grade across New Jersey is D, based on data from 21 counties with available SDWIS data.
Is tap water safe to drink in Cumberland County?
Based on EPA SDWIS data, Cumberland County has a water quality grade of F (30.4/100). 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 Cumberland County have so many water violations?
Cumberland County has 63 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 Cumberland County rank for water quality in New Jersey?
Cumberland County ranks #19 out of 21 counties in New Jersey by SDWIS water quality score (1 = best). With a score of 30.4/100, it falls in the bottom 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

Hunterdon County

New Jersey

F

30.5

Water score

Sussex County

New Jersey

F

28.3

Water score

Salem County

New Jersey

F

22.4

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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