Drinking water quality · 2024
· Verified
· PWSID MS0250008
What's in Jackson, MS tap water
3 contaminants in Jackson, MS's water sat at or above a federal limit, led by TTHM at 1.6x the limit.
- !3 contaminants at or above a federal limit — worst is TTHM at 1.6x
- !1 open health-based violation on the federal record
- !12 of 27 core regulated contaminants reported — 15 never appear in this report
+How this score is calculated
Every system starts at 100. Points come off for measured levels, for the federal violation record, and for how much of the core regulated set the utility actually reported. All three inputs are the utility's own published numbers and EPA's own records.
- −55 contaminants at or above a federal limit
- −0 contaminants within 20% of a limit
- −15 open health-based violations
- −0 open monitoring / reporting violations
- −6 health-based violations resolved in the last 5 years
- −11 core regulated contaminants never reported (12/27)
A 90–100 · B 80–89 · C 70–79 · D 60–69 · F below 60. A system reporting under a third of the core set is capped at C however clean its numbers look — a short report is not a clean bill of health.
Full grading methodology, constant for constant →What to worry about
- TTHM1.6× the federal limit17.7–131 ug/L · limit 80 ug/L
Long-term exposure above the federal limit is linked to liver, kidney, and central-nervous-system effects and increased cancer risk.
higher than 95% of U.S. systems
- HAA51.6× the federal limit14.4–97.3 ug/L · limit 60 ug/L
Long-term exposure above the federal limit is associated with an increased cancer risk.
higher than 95% of U.S. systems
- Chloramine1.1× the federal limit0.31–4.4 mg/L · limit 4 mg/L
Holds disinfection further into the pipe network, but is regulated under the same residual-disinfectant cap as chlorine.
higher than 95% of U.S. systems
+15 contaminants were measured and came in below the limitShow all
| Contaminant | Measured | Federal limit |
|---|---|---|
| Cyanide | 127 ug/L | 200 ug/L |
| Chlorine | 0.08–2.2 mg/L | 4 mg/L |
| Lead | 0.0074 mg/L | 0.015 mg/L |
| Turbidity | 0.02–0.36 NTU | 1 NTU |
| Combined Radium | 1.4 pCi/L | 5 pCi/L |
| Copper | 0.007–0.33 mg/L | 1.3 mg/L |
| Fluoride | 0.55 mg/L | 4 mg/L |
| Gross Alpha | 2 pCi/L | 15 pCi/L |
| Carbon Tetrachloride | 0.52 ug/L | 5 ug/L |
| Nitrite | 0.069 mg/L | 1 mg/L |
| Chromium | 5.9 ug/L | 100 ug/L |
| Nitrate | 0.46 mg/L | 10 mg/L |
| Barium | 0.026 mg/L | 2 mg/L |
| Sodium | 4.4 mg/L | — |
| TOC | 1–1.2 | — |
What this report doesn't tell you
15 of the 27 contaminants a community water system normally reports do not appear anywhere in Jackson, MS's data. Absent is not the same as absent-from-the-water — it means nobody published a number.
+Full detail: PFAS testing, water source, historical monitoring, and the federal violation record
Where your water comes from · EPA SDWIS
Jackson, MS's drinking water comes from surface water, drawn from 2 sources.
Source
- INTAKE IN071
- INTAKE IN072
Treatment
- TREATMENT FACILITY TF081 (FEWELL)
- TREATMENT FACILITY TF082 (CURTIS CONVEN)
- TREATMENT FACILITY TF083 (CURTIS MEMBR)
Distribution
Compliance history
Federal Safe Drinking Water Act violation & enforcement records (EPA SDWIS). A violation is a regulatory determination by the state or EPA — separate from the measured levels above.
- Treatment technique violationHealth-based28 violations on record · most recent Jul 20241 open
- Maximum contaminant level exceededHealth-based22 violations on record · most recent Apr 2025resolved
Source: EPA SDWIS / ECHO. View the full federal record on EPA ECHO ↗