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County water report

Warren County Water Report

Drinking-water compliance, watershed health, monitoring records, and river conditions for Warren County, Mississippi.

Water grade

C

Water score

52.9

State rank

#46

of 82

Health violations

7

EPA SDWIS, 5-year lookback

Watershed impaired

Not reported

EPA ATTAINS coverage varies by state

Monitoring sites

15

30,800 recent measurements

Live streamflow

99%

MISSISSIPPI RIVER AT VICKSBURG, MS

Water at a glance

Key Water Indicators for Warren County

EPA SDWIS

Safety Grade

C

Score: 52.9 / 100

EPA SDWIS

Active Violations

7

5-year health-based lookback

EPA ATTAINS

Watershed Health

Not reported

Coverage varies by state

USGS NWIS

Streamflow Snapshot

99% of mean

MISSISSIPPI RIVER AT VICKSBURG, MS

EPA WQP

Monitoring Sites

15

30,800 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.

52.9/100

Health violations

7

Health-based violations

Violations per 100K served

12.5

Population-normalized SDWIS rate

Editorial analysis

Understanding Warren County’s Water

Drinking Water Quality Overview

EPA SDWIS

Warren County's drinking water earned a C grade, scoring 52.9 out of 100. Over the past five years, EPA SDWIS records 7 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 2026-05-14T13:00:00.000-05:00) puts MISSISSIPPI RIVER at 735.0k cfs — near its historical average at 99% 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. Warren County has moderate coverage with 15 active monitoring sites with 30,800 recent measurements on record. Predominant monitoring categories include organics, pesticide and physical. 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 Warren County

Water Verdict

Warren County receives a below-average water quality assessment with a grade of C and a score of 52.9 out of 100. Residents should review their utility's Consumer Confidence Report and may want to consider additional water filtration for drinking.

Violation Context

Warren County has recorded 7 health-based violations, indicating multiple instances where federal contaminant limits or treatment requirements were not met. At 12.5 violations per 100,000 people served, this rate is high and signals significant water quality management issues.

Consumer Guidance

Tap water in Warren County meets baseline standards but the compliance record shows room for improvement, with a Grade C rating. Warren County's drinking-water compliance score is 52.9 out of 100. The violation rate for Warren County is 12.5 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 15 active water-quality monitoring sites in Warren County, data coverage is strong. A pipeline streamflow snapshot from the MISSISSIPPI RIVER gauge is also available on this page.

Regional Context

Warren County has water quality close to the average county in Mississippi. Its water score is within 1.2 points of the state average, meaning its overall water system performance is broadly representative of Mississippi 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 Warren County's water environment

Official EPA Resources for Warren County

EPA How's My Waterway

Interactive watershed health data for Warren County

EPA ECHO: Drinking Water Systems

Search water utilities and violation records for Warren County

Consumer Confidence Reports (MS)

Annual water quality reports from utilities in Mississippi

Past 5 years

Water Quality Monitoring

Monitoring Sites

15

Active in the past 5 years

Measurements Recorded

31K

30,800 total readings

Most Measured

  • Organics, Pesticide
  • Physical
  • 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

735.0Kcfs

May 14, 6:00 PM UTC

vs Long-Term Average

99%

Near typical

Primary Streamgage

MISSISSIPPI RIVER AT VICKSBURG, MS

USGS site
07289000
Drainage area
1,144,500 sq mi
Long-term mean
740.1K 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 Warren County:D — Poor

Elevated violations or significant watershed impairment.

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 Warren County, Mississippi?
Warren County, Mississippi has a drinking-water quality grade of C with a score of 52.9/100, based on EPA SDWIS compliance data. The county has 7 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 Warren County?
Warren County has 7 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 Warren County?
EPA's Water Quality Portal records 30,800 measurements from 15 monitoring sites in Warren County over the past five years. The most frequently measured characteristic groups are Organics, Pesticide, Physical, 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 Warren County right now?
Warren County's primary USGS streamgage on the MISSISSIPPI RIVER has a pipeline snapshot of 735,000 cubic feet per second — 99% of the long-term mean of 740,112.5 cfs. Flow is within typical range for this gauge. For the latest gauge feed, visit waterdata.usgs.gov.
How does Warren County water compare to the Mississippi average?
Warren County's SDWIS water quality score of 52.9/100 is higher than the Mississippi state average of 51.7. The average water quality grade across Mississippi is D, based on data from 82 counties with available SDWIS data.
Is tap water safe to drink in Warren County?
Based on EPA SDWIS data, Warren County has a water quality grade of C (52.9/100). 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 Warren County have so many water violations?
Warren County has 7 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 Warren County rank for water quality in Mississippi?
Warren County ranks #46 out of 82 counties in Mississippi by SDWIS water quality score (1 = best). With a score of 52.9/100, 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

Lafayette County

Mississippi

C

53.2

Water score

Jefferson County

Mississippi

C

53.6

Water score

Union County

Mississippi

C

54.1

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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