waterbycounty
EPA SDWIS

Jackson County Water Quality

Jackson County, Mississippi

Water Grade

C

Water Score

56.6

Violations

12

State Rank

#39

of 82 (1 = best)

EPA SDWIS Compliance

Drinking Water Quality

Water Quality Grade

C

Based on EPA compliance history and violation data

Water Score

56.6/100

Higher = better quality

Health Violations

12

Health-based violations

Violation Rate

9.1%

Systems with violations

Water Advisory: Jackson County

Water Verdict

Jackson County receives a fair water quality assessment with a grade of C and a score of 56.6 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

Jackson County has recorded 12 health-based violations, indicating multiple instances where federal contaminant limits or treatment requirements were not met. At 9.1 violations per 1,000 residents, this rate is high and signals significant water quality management issues.

Consumer Guidance

Tap water in Jackson 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 12 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

Jackson County has water quality close to the average county in Mississippi. Its water score is within 4.9 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

68

Active in the past 5 years

Measurements Recorded

24K

23,886 total readings

Most Measured

  • Physical
  • Nutrient
  • Organics, Pesticide

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

56.9Kcfs

May 14, 6:45 PM UTC

vs Long-Term Average

438%

Well above typical

Primary Streamgage

PASCAGOULA RIVER AT GRAHAM FERRY, MS

USGS site
02479310
Drainage area
8,204 sq mi
Long-term mean
13.0K 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 Jackson County, Mississippi?
Jackson County, Mississippi has a drinking-water quality grade of C with a score of 56.6/100, based on EPA SDWIS compliance data. The county has 12 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 Jackson County?
Jackson County has 12 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 Jackson County?
EPA's Water Quality Portal records 23,886 measurements from 68 monitoring sites in Jackson County over the past five years. The most frequently measured characteristic groups are Physical, Nutrient, Organics, Pesticide. 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 Jackson County right now?
Jackson County's primary USGS streamgage on the PASCAGOULA RIVER is currently reading 56,900 cubic feet per second — 438% of the long-term mean of 12,978.15 cfs. This is well above typical — often a signal of recent precipitation or storm runoff. For genuine real-time data, visit waterdata.usgs.gov.
How does Jackson County water compare to the Mississippi average?
Jackson County's SDWIS water quality score of 56.6/100 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 Jackson County?
Based on EPA SDWIS data, Jackson County has a water quality grade of C (56.6/100). 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 Jackson County have so many water violations?
Jackson County has 12 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 Jackson County rank for water quality in Mississippi?
Jackson County ranks #39 out of 82 counties in Mississippi by SDWIS water quality score (1 = best). With a score of 56.6/100, 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

Marshall County

Mississippi

C

56.8

Water score

Itawamba County

Mississippi

C

57.2

Water score

Lawrence County

Mississippi

C

57.5

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 Jackson County

Property TaxCost of LivingCrime RateIncomeHealthSchoolsDisaster RiskWeatherCounty Score