Tap Water Quality Report
Tap water quality in Baton Rouge, Louisiana
Tap water in Baton Rouge, Louisiana receives a grade of C (76/100) from TapWaterSafety.org. It's served by 2 public water systems, primarily BATON ROUGE WATER COMPANY. 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 Baton Rouge's tap water
Top water quality concerns identified by the EPA and Environmental Working Group across the utilities serving Baton Rouge.
Haloacetic acids (HAA9) significantly above health guideline
Moderate concernHaloacetic acids (HAA9) detected at 1.48 ppb, 25x above the EWG health guideline of 0.06 ppb.
Haloacetic acids (HAA5) significantly above health guideline
Moderate concernHaloacetic acids (HAA5) detected at 1.82 ppb, 18x above the EWG health guideline of 0.1 ppb.
Total trihalomethanes (TTHMs) significantly above health guideline
Moderate concernTotal trihalomethanes (TTHMs) detected at 1.9 ppb, 13x above the EWG health guideline of 0.15 ppb.
Arsenic detected
Moderate concernArsenic detected at 0.0198 ppb.
EPA compliance record
Official U.S. EPA records for BATON ROUGE WATER COMPANY (system ID LA1033005) 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 Baton Rouge
Baton Rouge is served by 2 public water systems. Click any utility to see its complete grade card and treatment plant contact info.
BATON ROUGE WATER COMPANY
- Haloacetic acids (HAA9) significantly above health guideline
- Haloacetic acids (HAA5) significantly above health guideline
- Total trihalomethanes (TTHMs) significantly above health guideline
NEW IBERIA WATER SYSTEM (LAWCO)
- Haloacetic acids (HAA9) significantly above health guideline
- Total trihalomethanes (TTHMs) significantly above health guideline
- Haloacetic acids (HAA5) significantly above health guideline
Recommended filters for Baton Rouge
Filters matched to the specific contaminants in Baton Rouge'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.
Reverse osmosis certified for arsenic (NSF/ANSI 58)
$429-$599Reverse osmosis certified under NSF/ANSI 58 for arsenic is the most reliable home option.
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 Baton Rouge'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 |
40.2 ppb | 0.06 | — | — | — | — | — | 670× over |
| Total trihalomethanes (TTHMs) Disinfection byproduct |
60.4 ppb | 0.15 | 80.0 | 100 | — | — | — | 403× over |
| Haloacetic acids (HAA5) Disinfection byproduct |
30.6 ppb | 0.1 | 60.0 | 60 | — | — | — | 306× over |
| Bromodichloromethane Disinfection byproduct |
15.8 ppb | 0.06 | — | — | — | — | — | 263× over |
| Dibromoacetic acid Disinfection byproduct |
2.92 ppb | 0.03 | — | — | — | — | — | 97× over |
| Dichloroacetic acid Disinfection byproduct |
19.0 ppb | 0.2 | — | — | — | — | — | 95× over |
| Chloroform Disinfection byproduct |
36.2 ppb | 0.4 | — | — | — | — | — | 90× over |
| Arsenic Heavy metal |
0.341 ppb | 0.004 | 10.0 | 10 | 10 | 0.004 | — | 85× over |
| Dibromochloromethane Disinfection byproduct |
7.91 ppb | 0.1 | — | — | — | — | — | 79× over |
| Trichloroacetic acid Disinfection byproduct |
7.51 ppb | 0.1 | — | — | — | — | — | 75× over |
| Chromium (hexavalent) Heavy metal |
0.503 ppb | 0.02 | — | — | — | — | — | 25× over |
| Radium, combined (-226 and -228) Radiological |
0.83 pCi/L | 0.05 | 5.0 | — | — | — | — | 17× over |
| Manganese Heavy metal |
129.8 ppb | 100.0 | — | 50 | 80 | — | — | Fails EU |
| Bromoform Disinfection byproduct |
0.56 ppb | 0.5 | — | — | — | — | — | 1.1× over |
| Barium Heavy metal |
297.5 ppb | 700.0 | 2000.0 | — | 1300 | 2000 | — | Below guideline |
| Nitrate and nitrite Inorganic |
0.0583 ppm | 0.14 | 10.0 | 11.3 | 11.3 | 10 | — | Below guideline |
| Antimony Heavy metal |
0.0877 ppb | 1.0 | 6.0 | 10 | 20 | 1 | — | Below guideline |
| Chlorate Disinfection byproduct |
13.9 ppb | 210.0 | — | — | — | — | — | Below guideline |
| Aluminum Heavy metal |
25.7 ppb | 600.0 | — | 200 | — | 600 | — | Below guideline |
| Vanadium Other |
0.698 ppb | 21.0 | — | — | — | — | — | Below guideline |
| Molybdenum Other |
1.18 ppb | 40.0 | — | — | — | — | — | Below guideline |
| Monochloroacetic acid Disinfection byproduct |
1.12 ppb | 53.0 | — | — | — | — | — | Below guideline |
| Heptachlor epoxide Other |
3.8e-05 ppb | 0.006 | 0.2 | — | — | — | — | Below guideline |
| Monobromoacetic acid Disinfection byproduct |
0.121 ppb | 25.0 | — | — | — | — | — | Below guideline |
| Cobalt Other |
0.0245 ppb | 70.0 | — | — | — | — | — | Below guideline |
| Strontium Radiological |
0.0661 ppb | 1500.0 | — | — | — | — | — | Below guideline |
| Xylenes (total) Volatile organic compound |
0.0563 ppb | 1800.0 | 10000.0 | — | — | — | — | Below guideline |
| 1-Butanol Other |
0.0561 ppb | — | — | — | — | — | — | Below guideline |
| Fluoride Inorganic |
0.33 ppm | — | 4.0 | 1.5 | 1.5 | — | — | Below guideline |
| Germanium Other |
0.351 ppb | — | — | — | — | — | — | Below guideline |
| Lithium Other |
13.6 ppb | — | — | — | — | — | — | Below guideline |
| Silver Other |
3.5 ppb | — | — | — | — | — | — | Below guideline |
| Chromium (total) Heavy metal |
4.05 ppb | — | 100.0 | — | — | — | — | 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 BATON ROUGE WATER COMPANY.
General Contact
Treatment Plant
ZIP codes served
Baton Rouge's public water systems serve the following ZIP codes: