City of Jackson
Jackson, Mississippi · PWSID: MS0250008
Jackson Water Quality Summary
City of Jackson supplies drinking water to about 189,673 people in Jackson, Mississippi, and draws from surface water (rivers, lakes, or reservoirs), which requires fuller treatment for runoff, sediment, and microbial risk. On the IsWaterSafe scale it earns a failing Water Safety Score of 0 out of 100 (Grade F), a composite of its EPA SDWIS violation and contaminant record.
EPA records show 100 health-based violations for this system plus 57 monitoring violations. A health-based violation means a contaminant exceeded its legal EPA limit, the most serious category in the Safe Drinking Water Act. The system has 101 enforcement actions on file in response.
Among the 4 substances sampled, Haloacetic Acids (HAA5) is the clearest concern: a reading of 0.066 mg/l against an EPA limit (MCL) of 60 ppb, about 110% of the legal ceiling, sampled October 2020. In total, 13 contaminant exceedances are recorded for this system.
The most pressing open issue is a monitoring violation involving Combined Filter Effluent, beginning January 2019 and still open in EPA records.
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Detected Contaminants
| Contaminant | Detected Level | MCL (Limit) | Status | Sample Date |
|---|---|---|---|---|
| Combined Filter Effluent | 0.5 NTU | 1 NTU | Within Limit | Jul 1, 2018 |
| Chlorine | 2 ppm | 4 ppm | Within Limit | Jan 1, 2020 |
| Haloacetic Acids (HAA5) | 0.066 mg/l | 60 mg/l | Exceeds Limit | Oct 1, 2020 |
| Total Trihalomethanes | 0.085 mg/l | 80 mg/l | Exceeds Limit | Jul 1, 2024 |
Violation History
Frequently Asked Questions
City of Jackson has a Water Safety Score of F (0/100). The system serves 189,673 people and has 100 health violations on record. Check the contaminant table above for specific detected substances.
City of Jackson has 13 contaminant exceedances above EPA health guidelines. See the full contaminant detection table above for all tested substances and their levels relative to legal limits and health guidelines.
The Water Safety Score (0-100, grades A through F) is based on contaminant levels relative to legal limits, health guideline exceedances, violation history, and enforcement actions. Higher scores indicate fewer concerns.
If your water system has violations, request the Consumer Confidence Report from your utility, consider getting an independent water test from a certified lab, and look into certified water filters for specific contaminants of concern. For lead, run cold water for 30 seconds before drinking.
Water quality data sourced from EPA's Safe Drinking Water Information System (SDWIS). Safety scores are calculated based on contaminant levels, violations, and enforcement history. This is not a substitute for your utility's official Consumer Confidence Report.
Source: EPA Ground Water and Drinking Water, 2026.