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EPA SDWIS

Grenada County Water Quality

Grenada County, Mississippi

Water Grade

B

Water Score

65.6

Violations

1

State Rank

#19

of 82 (1 = best)

EPA SDWIS Compliance

Drinking Water Quality

Water Quality Grade

B

Based on EPA compliance history and violation data

Water Score

65.6/100

Higher = better quality

Health Violations

1

Health-based violations

Violation Rate

3.2%

Systems with violations

Water Advisory: Grenada County

Water Verdict

Grenada County receives a fair water quality assessment with a grade of B and a score of 65.6 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

Grenada County has recorded 1 health-based violation, meaning the water system experienced at least one exceedance of federal contaminant limits or treatment requirements. At 3.2 violations per 1,000 residents, this rate is moderate and suggests recurring water quality challenges.

Consumer Guidance

Tap water in Grenada County is generally safe to drink based on available data. Residents should still review their utility's annual Consumer Confidence Report for transparency on detected contaminants. With 1 recorded health violation, 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

Grenada County has better water quality than the average county in Mississippi. Its water score is 13.9 points higher than the state average, indicating stronger water system performance relative to neighboring counties.

Past 5 years

Water Quality Monitoring

Monitoring Sites

5

Active in the past 5 years

Measurements Recorded

453

453 total readings

Most Measured

  • Organics, Pesticide
  • Organics, Other
  • Physical

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

76.3cfs

May 14, 7:00 PM UTC

vs Long-Term Average

3%

Well below typical

Primary Streamgage

YALOBUSHA RIVER AT GRENADA, MS

USGS site
07285500
Drainage area
1,550 sq mi
Long-term mean
2,511 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 Grenada County, Mississippi?
Grenada County, Mississippi has a drinking-water quality grade of B with a score of 65.6/100, based on EPA SDWIS compliance data. The county has 1 health-based drinking water violation over the past 5 years. Watershed health, monitoring records, and live streamflow are reported separately on this page.
Are there any water violations in Grenada County?
Grenada County has 1 health-based drinking water violation 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 Grenada County?
EPA's Water Quality Portal records 453 measurements from 5 monitoring sites in Grenada County over the past five years. The most frequently measured characteristic groups are Organics, Pesticide, Organics, Other, Physical. 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 Grenada County right now?
Grenada County's primary USGS streamgage on the YALOBUSHA RIVER is currently reading 76.3 cubic feet per second — 3% of the long-term mean of 2,510.58 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 Grenada County water compare to the Mississippi average?
Grenada County's SDWIS water quality score of 65.6/100 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 Grenada County?
Based on EPA SDWIS data, Grenada County has a water quality grade of B (65.6/100). This indicates good to excellent water quality with strong SDWIS compliance. 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 Grenada County have clean drinking water?
Grenada County has 1 health-based drinking water violation according to EPA records. With a water quality score of 65.6/100 and grade B, 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 Grenada County rank for water quality in Mississippi?
Grenada County ranks #19 out of 82 counties in Mississippi by SDWIS water quality score (1 = best). With a score of 65.6/100, 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

Leflore County

Mississippi

B

65.6

Water score

Scott County

Mississippi

B

65.8

Water score

Lincoln County

Mississippi

B

66.0

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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