waterbycounty
EPA SDWIS

Prentiss County Water Quality

Prentiss County, Mississippi

Water Grade

C

Water Score

60.1

Violations

2

State Rank

#28

of 82 (1 = best)

EPA SDWIS Compliance

Drinking Water Quality

Water Quality Grade

C

Based on EPA compliance history and violation data

Water Score

60.1/100

Higher = better quality

Health Violations

2

Health-based violations

Violation Rate

6.3%

Systems with violations

Water Advisory: Prentiss County

Water Verdict

Prentiss County receives a fair water quality assessment with a grade of C and a score of 60.1 out of 100. The water supply meets baseline federal standards, but there may be periods of elevated contaminant levels or infrastructure concerns worth monitoring.

Violation Context

Prentiss County has recorded 2 health-based violations, indicating multiple instances where federal contaminant limits or treatment requirements were not met. At 6.3 violations per 1,000 residents, this rate is moderate and suggests recurring water quality challenges.

Consumer Guidance

Tap water in Prentiss 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 2 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

Prentiss County has better water quality than the average county in Mississippi. Its water score is 8.4 points higher than the state average, indicating stronger water system performance relative to neighboring counties.

Past 5 years

Water Quality Monitoring

Monitoring Sites

4

Active in the past 5 years

Measurements Recorded

3.9K

3,913 total readings

Most Measured

  • Physical
  • Nutrient
  • Organics, Other

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

5.60cfs

Oct 1, 4:45 AM UTC

vs Long-Term Average

12%

Well below typical

Primary Streamgage

BIG BROWN CREEK NR BOONEVILLE, MS

USGS site
02429900
Drainage area
27.1 sq mi
Long-term mean
47.4 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.

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Frequently Asked Questions

What is the water quality in Prentiss County, Mississippi?
Prentiss County, Mississippi has a drinking-water quality grade of C with a score of 60.1/100, based on EPA SDWIS compliance data. The county has 2 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 Prentiss County?
Prentiss County has 2 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 Prentiss County?
EPA's Water Quality Portal records 3,913 measurements from 4 monitoring sites in Prentiss County over the past five years. The most frequently measured characteristic groups are Physical, Nutrient, Organics, Other. 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 Prentiss County right now?
Prentiss County's primary USGS streamgage on the BIG BROWN CREEK is currently reading 5.6 cubic feet per second — 12% of the long-term mean of 47.39 cfs. This is well below typical — often a signal of drought stress on source water. For genuine real-time data, visit waterdata.usgs.gov.
How does Prentiss County water compare to the Mississippi average?
Prentiss County's SDWIS water quality score of 60.1/100 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 Prentiss County?
Based on EPA SDWIS data, Prentiss County has a water quality grade of C (60.1/100). 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).
Does Prentiss County have clean drinking water?
Prentiss County has 2 health-based drinking water violations according to EPA records. With a water quality score of 60.1/100 and grade C, 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 Prentiss County rank for water quality in Mississippi?
Prentiss County ranks #28 out of 82 counties in Mississippi by SDWIS water quality score (1 = best). With a score of 60.1/100, it falls in the top 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

Lamar County

Mississippi

C

60.6

Water score

Jefferson Davis County

Mississippi

C

59.1

Water score

Tippah County

Mississippi

C

59.0

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

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