Tap Water Quality Report
Tap water quality in JEFFERSON, Louisiana
Tap water in JEFFERSON, Louisiana receives a grade of C (70/100) from TapWaterSafety.org. It's served by 2 public water systems, primarily E JEFFERSON WW DISTRICT 1. The most significant water quality concerns are: Haloacetic acids (HAA9) significantly above health guideline; Haloacetic acids (HAA5) significantly above health guideline; Total trihalomethanes (TTHMs) significantly above health guideline; Arsenic detected. Data sources: EPA SDWIS, EPA ECHO, EWG Tap Water Database.
What's in JEFFERSON's tap water
Top water quality concerns identified by the EPA and Environmental Working Group across the utilities serving JEFFERSON.
Haloacetic acids (HAA9) significantly above health guideline
Moderate concernHaloacetic acids (HAA9) detected at 40.6 ppb, 677x above the EWG health guideline of 0.06 ppb.
Haloacetic acids (HAA5) significantly above health guideline
Moderate concernHaloacetic acids (HAA5) detected at 35.9 ppb, 359x above the EWG health guideline of 0.1 ppb.
Total trihalomethanes (TTHMs) significantly above health guideline
Moderate concernTotal trihalomethanes (TTHMs) detected at 53.8 ppb, 359x above the EWG health guideline of 0.15 ppb.
Arsenic detected
Moderate concernArsenic detected at 0.2 ppb.
EPA compliance record
Official U.S. EPA records for E JEFFERSON WW DISTRICT 1 (system ID LA1051001) for the last 3 years. Checked 2026-10-07.
Source: U.S. EPA Enforcement and Compliance History Online (ECHO), from the Safe Drinking Water Information System. See EPA's full report.
Water systems serving JEFFERSON
JEFFERSON is served by 2 public water systems. Click any utility to see its complete grade card and treatment plant contact info.
E JEFFERSON WW DISTRICT 1
- Haloacetic acids (HAA9) significantly above health guideline
- Haloacetic acids (HAA5) significantly above health guideline
- Total trihalomethanes (TTHMs) significantly above health guideline
W JEFFERSON WW DISTRICT 2
- Haloacetic acids (HAA9) significantly above health guideline
- Total trihalomethanes (TTHMs) significantly above health guideline
- Haloacetic acids (HAA5) significantly above health guideline
Recommended filters for JEFFERSON
Filters matched to the specific contaminants in JEFFERSON's water supply.
Carbon filter certified for VOCs (NSF/ANSI 53)
$180-$599Activated carbon is effective for disinfection byproducts. Look for NSF/ANSI 53 VOC reduction.
Disclosure: TapWaterSafety earns a commission from purchases made through these links. This does not influence our scoring methodology or filter selection.
All contaminants detected in JEFFERSON's tap water
Every contaminant identified, compared side-by-side against US EPA legal limits, the EU Drinking Water Directive (2020/2184), WHO Guidelines, and California's Public Health Goal. Why we show multiple standards →
| Contaminant | Detected | EWG US health-based |
EPA US legal |
EU DWD Europe |
WHO global |
CA PHG strictest US |
Tested sample year |
Status |
|---|---|---|---|---|---|---|---|---|
| Haloacetic acids (HAA9) Disinfection byproduct |
40.6 ppb | 0.06 | — | — | — | — | — | 677× over |
| Total trihalomethanes (TTHMs) Disinfection byproduct |
55.9 ppb | 0.15 | 80.0 | 100 | — | — | — | 372× over |
| Haloacetic acids (HAA5) Disinfection byproduct |
35.9 ppb | 0.1 | 60.0 | 60 | — | — | — | 359× over |
| Bromodichloromethane Disinfection byproduct |
13.9 ppb | 0.06 | — | — | — | — | — | 232× over |
| Trichloroacetic acid Disinfection byproduct |
17.4 ppb | 0.1 | — | — | — | — | — | 174× over |
| Chloroform Disinfection byproduct |
36.3 ppb | 0.4 | — | — | — | — | — | 91× over |
| Dichloroacetic acid Disinfection byproduct |
16.2 ppb | 0.2 | — | — | — | — | — | 81× over |
| Arsenic Heavy metal |
0.2 ppb | 0.004 | 10.0 | 10 | 10 | 0.004 | — | 50× over |
| Dibromochloromethane Disinfection byproduct |
4.84 ppb | 0.1 | — | — | — | — | — | 48× over |
| Dibromoacetic acid Disinfection byproduct |
0.955 ppb | 0.03 | — | — | — | — | — | 32× over |
| Nitrate and nitrite Inorganic |
1.4 ppm | 0.14 | 10.0 | 11.3 | 11.3 | 10 | — | 10× over |
| Chromium (hexavalent) Heavy metal |
0.0745 ppb | 0.02 | — | — | — | — | — | 3.7× over |
| Radium, combined (-226 and -228) Radiological |
0.12 pCi/L | 0.05 | 5.0 | — | — | — | — | 2.4× over |
| Atrazine Pesticide/Herbicide |
0.149 ppb | 0.1 | 3.0 | 0.1 | 100 | 0.15 | — | Fails EU |
| Bromoform Disinfection byproduct |
0.437 ppb | 0.5 | — | — | — | — | — | Below guideline |
| Carbon tetrachloride Volatile organic compound |
0.0542 ppb | 0.1 | 5.0 | — | — | — | — | Below guideline |
| 1,4-Dioxane Semi-volatile organic compound |
0.156 ppb | 0.35 | — | — | 50 | 1 | — | Below guideline |
| Simazine Pesticide/Herbicide |
0.0437 ppb | 0.1 | 4.0 | — | — | — | — | Below guideline |
| Uranium Radiological |
0.13 pCi/L | 0.43 | 20.0 | 30 | 30 | 0.43 | — | Below guideline |
| Aluminum Heavy metal |
104.0 ppb | 600.0 | — | 200 | — | 600 | — | Below guideline |
| Monobromoacetic acid Disinfection byproduct |
2.51 ppb | 25.0 | — | — | — | — | — | Below guideline |
| Vanadium Other |
1.75 ppb | 21.0 | — | — | — | — | — | Below guideline |
| Chlorate Disinfection byproduct |
16.3 ppb | 210.0 | — | — | — | — | — | Below guideline |
| Molybdenum Other |
1.55 ppb | 40.0 | — | — | — | — | — | Below guideline |
| Monochloroacetic acid Disinfection byproduct |
0.864 ppb | 53.0 | — | — | — | — | — | Below guideline |
| Manganese Heavy metal |
1.26 ppb | 100.0 | — | 50 | 80 | — | — | Below guideline |
| Hexachlorocyclopentadiene Other |
0.0136 ppb | 2.0 | 50.0 | — | — | — | — | Below guideline |
| 2,4-D Pesticide/Herbicide |
0.116 ppb | 20.0 | 70.0 | — | — | — | — | Below guideline |
| Perfluorobutanoic Acid (PFBA) PFAS |
3.53 ppt | 1000.0 | — | — | — | — | — | Below guideline |
| Toluene Volatile organic compound |
0.0625 ppb | 150.0 | 1000.0 | — | — | — | — | Below guideline |
| Strontium Radiological |
0.175 ppb | 1500.0 | — | — | — | — | — | Below guideline |
| Bromide Other |
27.0 ppb | — | — | — | — | — | — | Below guideline |
| Dalapon Pesticide/Herbicide |
0.734 ppb | — | 200.0 | — | — | — | — | Below guideline |
| Fluoride Inorganic |
0.611 ppm | — | 4.0 | 1.5 | 1.5 | — | — | Below guideline |
| Lithium Other |
3.33 ppb | — | — | — | — | — | — | Below guideline |
| Quinoline Other |
0.00383 ppb | — | — | — | — | — | — | Below guideline |
All values in the unit of the detected level. Red cells indicate the detected level exceeds that standard. Some contaminants have limits in some jurisdictions but not others (shown as —). The "Tested" column shows the year each contaminant sample was collected.
Sources: US EPA, EU Drinking Water Directive 2020/2184, WHO Guidelines, California OEHHA PHGs, EWG Tap Water Database.
Treatment plant contact info
For service issues, water quality concerns, or to request a Consumer Confidence Report from E JEFFERSON WW DISTRICT 1.