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County water report

Trumbull County Water Report

Drinking-water compliance, watershed health, monitoring records, and river conditions for Trumbull County, Ohio.

Water grade

C

Water score

54.8

State rank

#52

of 88

Health violations

16

EPA SDWIS, 5-year lookback

Watershed impaired

0.0%

9 water bodies assessed

Monitoring sites

47

4,672 recent measurements

Live streamflow

226%

Mahoning River at Leavittsburg OH

Water at a glance

Key Water Indicators for Trumbull County

EPA SDWIS

Safety Grade

C

Score: 54.8 / 100

EPA SDWIS

Active Violations

16

5-year health-based lookback

EPA ATTAINS

Watershed Health

0% impaired

9 bodies assessed

USGS NWIS

Streamflow Snapshot

226% of mean

Mahoning River at Leavittsburg OH

EPA WQP

Monitoring Sites

47

4,672 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.

54.8/100

Health violations

16

Health-based violations

Violations per 100K served

10.6

Population-normalized SDWIS rate

Editorial analysis

Understanding Trumbull County’s Water

Drinking Water Quality Overview

EPA SDWIS

Trumbull County's drinking water earned a C grade, scoring 54.8 out of 100. Over the past five years, EPA SDWIS records 16 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 9 water bodies) across Trumbull 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 2026-05-14T14:15:00.000-04:00) puts Mahoning River at 1.6k cfs — running significantly above its long-term average at 226% 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. Trumbull County has moderate coverage with 47 active monitoring sites with 4,672 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 Trumbull County

Water Verdict

Trumbull County receives a below-average water quality assessment with a grade of C and a score of 54.8 out of 100. Residents should review their utility's Consumer Confidence Report and may want to consider additional water filtration for drinking.

Violation Context

Trumbull County has recorded 16 health-based violations, indicating multiple instances where federal contaminant limits or treatment requirements were not met. At 10.6 violations per 100,000 people served, this rate is high and signals significant water quality management issues.

Consumer Guidance

Tap water in Trumbull County meets baseline standards but the compliance record shows room for improvement, with a Grade C rating. Trumbull County's drinking-water compliance score is 54.8 out of 100. The violation rate for Trumbull County is 10.6 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 47 active water-quality monitoring sites in Trumbull County, data coverage is strong. A pipeline streamflow snapshot from the Mahoning River gauge is also available on this page.

Regional Context

Trumbull County has water quality close to the average county in Ohio. Its water score is within 1.4 points of the state average, meaning its overall water system performance is broadly representative of Ohio 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 Trumbull County's water environment

Official EPA Resources for Trumbull County

EPA How's My Waterway

Interactive watershed health data for Trumbull County

EPA ECHO: Drinking Water Systems

Search water utilities and violation records for Trumbull County

Consumer Confidence Reports (OH)

Annual water quality reports from utilities in Ohio

Clean Water Act §303(d)

Watershed Health

Impaired Water Bodies

0.0%

0 of 9 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

47

Active in the past 5 years

Measurements Recorded

4.7K

4,672 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

1,560cfs

May 14, 6:15 PM UTC

vs Long-Term Average

226%

Well above typical

Primary Streamgage

Mahoning River at Leavittsburg OH

USGS site
03094000
Drainage area
575 sq mi
Long-term mean
691 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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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 Trumbull 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 Trumbull County, Ohio?
Trumbull County, Ohio has a drinking-water quality grade of C with a score of 54.8/100, based on EPA SDWIS compliance data. The county has 16 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 Trumbull County?
Trumbull County has 16 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 Trumbull County?
EPA ATTAINS assessments under Clean Water Act §303(d) indicate 0.0% of Trumbull County's 9 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 Trumbull County?
EPA's Water Quality Portal records 4,672 measurements from 47 monitoring sites in Trumbull 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 Trumbull County right now?
Trumbull County's primary USGS streamgage on the Mahoning River has a pipeline snapshot of 1,560 cubic feet per second — 226% of the long-term mean of 690.83 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 Trumbull County water compare to the Ohio average?
Trumbull County's SDWIS water quality score of 54.8/100 is lower than the Ohio state average of 56.2. The average water quality grade across Ohio is D, based on data from 88 counties with available SDWIS data.
Is tap water safe to drink in Trumbull County?
Based on EPA SDWIS data, Trumbull County has a water quality grade of C (54.8/100). 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 Trumbull County have so many water violations?
Trumbull County has 16 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 Trumbull County rank for water quality in Ohio?
Trumbull County ranks #52 out of 88 counties in Ohio by SDWIS water quality score (1 = best). With a score of 54.8/100, 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

Belmont County

Ohio

C

55.7

Water score

Wayne County

Ohio

C

52.2

Water score

Fayette County

Ohio

C

57.7

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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