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County water report

Sullivan County Water Report

Drinking-water compliance, watershed health, monitoring records, and river conditions for Sullivan County, Pennsylvania.

Water grade

F

Water score

8.5

State rank

#67

of 67

Health violations

5

EPA SDWIS, 5-year lookback

Watershed impaired

0.0%

30,114 water bodies assessed

Monitoring sites

27

2,400 recent measurements

Live streamflow

94%

Muncy Creek near Sonestown, PA

Water at a glance

Key Water Indicators for Sullivan County

EPA SDWIS

Safety Grade

F

Score: 8.5 / 100

EPA SDWIS

Active Violations

5

5-year health-based lookback

EPA ATTAINS

Watershed Health

0% impaired

30,114 bodies assessed

USGS NWIS

Streamflow Snapshot

94% of mean

Muncy Creek near Sonestown, PA

EPA WQP

Monitoring Sites

27

2,400 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.

8.5/100

Health violations

5

Health-based violations

Violations per 100K served

400.0

Population-normalized SDWIS rate

Editorial analysis

Understanding Sullivan County’s Water

Drinking Water Quality Overview

EPA SDWIS

Sullivan County's water systems carry a failing grade, scoring 8.5 out of 100. Over the past five years, EPA SDWIS records 5 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 30,114 water bodies) across Sullivan 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 2026-05-14T14:30:00.000-04:00) puts Muncy Creek at 45.9 cfs — near its historical average at 94% 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. Sullivan County has moderate coverage with 27 active monitoring sites with 2,400 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 Sullivan County

Water Verdict

Sullivan County, Pennsylvania receives a poor water quality assessment with a grade of F and a score of 8.5 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 track 30,114 water bodies in the county's watershed, none of which are currently listed as impaired under the Clean Water Act. At the most recent USGS reading, local streamflow was tracking near its historical mean (93.5%).

Violation Context

EPA SDWIS records for Sullivan County, Pennsylvania show 5 health-based violations, indicating multiple instances where federal contaminant limits or treatment requirements were not met. At 400.0 violations per 100,000 people served, this rate is high and signals significant water quality management issues. For independent context, 2,400 water-quality monitoring results have been recorded across the county in the EPA Water Quality Portal over the past five years.

Consumer Guidance

Drinking-water compliance in Sullivan County is rated Grade F, reflecting significant health-based violations in the recent reporting period. Sullivan County's drinking-water compliance score is 8.5 out of 100. 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. With 27 active water-quality monitoring sites in Sullivan County, data coverage is strong. A pipeline streamflow snapshot from the Muncy Creek gauge is also available on this page.

Regional Context

Sullivan County has poorer water quality than the average county in Pennsylvania. Its water score is 30.4 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 Sullivan County's water environment

Official EPA Resources for Sullivan County

EPA How's My Waterway

Interactive watershed health data for Sullivan County

EPA ECHO: Drinking Water Systems

Search water utilities and violation records for Sullivan County

Consumer Confidence Reports (PA)

Annual water quality reports from utilities in Pennsylvania

Clean Water Act §303(d)

Watershed Health

Impaired Water Bodies

0.0%

0 of 30,114 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

27

Active in the past 5 years

Measurements Recorded

2.4K

2,400 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

45.9cfs

May 14, 6:30 PM UTC

vs Long-Term Average

94%

Near typical

Primary Streamgage

Muncy Creek near Sonestown, PA

USGS site
01552500
Drainage area
23.8 sq mi
Long-term mean
49.1 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

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Water Cost Estimate

3

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Annual Total

$558

Monthly

$47

Water Bill

$558/yr

Filter Cost

$0/yr

Safety Grade for Sullivan 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 Sullivan County, Pennsylvania?
Sullivan County, Pennsylvania has a drinking-water quality grade of F with a score of 8.5/100, based on EPA SDWIS compliance data. The county has 5 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 Sullivan County?
Sullivan County has 5 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 Sullivan County?
EPA ATTAINS assessments under Clean Water Act §303(d) indicate 0.0% of Sullivan County's 30,114 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 Sullivan County?
EPA's Water Quality Portal records 2,400 measurements from 27 monitoring sites in Sullivan 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 Sullivan County right now?
Sullivan County's primary USGS streamgage on the Muncy Creek has a pipeline snapshot of 45.9 cubic feet per second — 94% of the long-term mean of 49.11 cfs. Flow is within typical range for this gauge. For the latest gauge feed, visit waterdata.usgs.gov.
How does Sullivan County water compare to the Pennsylvania average?
Sullivan County's SDWIS water quality score of 8.5/100 is lower than the Pennsylvania state average of 38.9. The average water quality grade across Pennsylvania is F, based on data from 67 counties with available SDWIS data.
Is tap water safe to drink in Sullivan County?
Based on EPA SDWIS data, Sullivan County has a water quality grade of F (8.5/100). 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 Sullivan County have clean drinking water?
Sullivan County has 5 health-based drinking water violations according to EPA records. With a water quality score of 8.5/100 and grade F, 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 Sullivan County rank for water quality in Pennsylvania?
Sullivan County ranks #67 out of 67 counties in Pennsylvania by SDWIS water quality score (1 = best). With a score of 8.5/100, 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

Wyoming County

Pennsylvania

F

9.0

Water score

Bedford County

Pennsylvania

F

9.2

Water score

Warren County

Pennsylvania

F

9.4

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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