waterbycounty
EPA SDWIS

Warren County Water Quality

Warren County, Mississippi

Water Grade

C

Water Score

52.9

Violations

7

State Rank

#46

of 82 (1 = best)

EPA SDWIS Compliance

Drinking Water Quality

Water Quality Grade

C

Based on EPA compliance history and violation data

Water Score

52.9/100

Higher = better quality

Health Violations

7

Health-based violations

Violation Rate

12.5%

Systems with violations

Water Advisory: 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 1,000 residents, this rate is high and signals significant water quality management issues.

Consumer Guidance

Tap water in Warren County meets baseline standards, but residents who are immunocompromised or have young children may want to use an NSF-certified water filter as a precaution. With 7 recorded health violations, staying informed about utility communications and boil-water notices is especially important. For long-term peace of mind, request your utility's latest Consumer Confidence Report and consider independent water testing if you have specific health concerns.

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.

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; "% of typical" compares the latest reading against that average.

Improve your water quality at home

Berkey filters remove 99.9%+ of contaminants from tap water.

Shop Berkey →

Sponsored

Test your tap water

Tap Score provides professional mail-in water testing.

Get Tested →

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 live streamflow 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 is currently reading 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 genuine real-time data, 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 Logan Johnson, Founder & Data EditorUpdated Reviewed by Logan Johnson, Founder & Data Editor

Explore more data for Warren County

Property TaxCost of LivingCrime RateIncomeHealthSchoolsDisaster RiskWeatherCounty Score