Water Quality Report · Updated May 12, 2026
NEW IBERIA WATER SYSTEM (LAWCO)
NEW IBERIA WATER SYSTEM (LAWCO) delivers tap water graded D (64/100) by TapWaterSafety.org. The utility serves approximately 59,928 residents in BATON ROUGE, Louisiana using groundwater. The most significant water quality concerns are: Haloacetic acids (HAA9) significantly above health guideline; Total trihalomethanes (TTHMs) significantly above health guideline; Haloacetic acids (HAA5) significantly above health guideline; Arsenic detected. For questions, the utility can be reached at 225-952-7601.
Is BATON ROUGE tap water safe to drink?
NEW IBERIA WATER SYSTEM (LAWCO) delivers tap water that earns a grade of D (64/100) from TapWaterSafety.org — a below-average rating, with multiple concerns including haloacetic acids (haa9) significantly above health guideline.
The utility serves 59,928 residents in BATON ROUGE, drawing from groundwater. Despite being legal under US EPA standards, this water would fail the European Union's Drinking Water Directive, primarily due to haloacetic acids (haa9) significantly above health guideline.
Public testing data identifies 14 contaminants in this water above EWG's health-based guidelines, including: Haloacetic acids (HAA9), Total trihalomethanes (TTHMs), Haloacetic acids (HAA5), Bromodichloromethane, Dibromoacetic acid, Dichloroacetic acid, Chloroform, Arsenic, Dibromochloromethane, Trichloroacetic acid, Chromium (hexavalent), Radium, combined (-226 and -228), Manganese, Bromoform. For most residents, a properly certified home filter at the kitchen tap is the most cost-effective way to reduce exposure to whatever's in your water. See our filter recommendations below, matched specifically to this utility's contaminant profile.
Quick actions for BATON ROUGE residents
Top concerns in this water
Based on the most recent EPA and EWG data, these are the most significant water quality issues for NEW IBERIA WATER SYSTEM (LAWCO).
Haloacetic acids (HAA9) significantly above health guideline
Moderate concernHaloacetic acids (HAA9) detected at 40.2 ppb, 670x above the EWG health guideline of 0.06 ppb.
Total trihalomethanes (TTHMs) significantly above health guideline
Moderate concernTotal trihalomethanes (TTHMs) detected at 60.4 ppb, 403x above the EWG health guideline of 0.15 ppb.
Haloacetic acids (HAA5) significantly above health guideline
Moderate concernHaloacetic acids (HAA5) detected at 30.6 ppb, 306x above the EWG health guideline of 0.1 ppb.
Arsenic detected
Moderate concernArsenic detected at 0.341 ppb.
Contact NEW IBERIA WATER SYSTEM (LAWCO)
Reach the utility directly for service issues, water quality concerns, or to request your Consumer Confidence Report.
General Contact
Treatment Plant
Recommended water filters for BATON ROUGE
Filters matched to the specific contaminants in this water supply.
Carbon block (NSF/ANSI 42 + 53)
$40-$750Activated carbon is highly effective for disinfection byproducts like TTHM and HAA5.
Reverse Osmosis
$249-$750Arsenic is most effectively removed by reverse osmosis. Some specialized adsorptive filters also work.
Disclosure: TapWaterSafety earns a commission from purchases made through these links. This does not influence our scoring methodology or filter selection.
Score breakdown
This utility's overall score of 64/100 breaks down across five weighted components. Read the full methodology →
Contaminants detected — international standards comparison
Every contaminant detected, compared side-by-side against US EPA legal limits, the EU Drinking Water Directive (2020/2184), WHO Guidelines, and California's Public Health Goal (the strictest US benchmark). 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 |
0.0333 ppm | 0.14 | 10.0 | 11.3 | 11.3 | 10 | — | 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 |
| Monobromoacetic acid Disinfection byproduct |
0.121 ppb | 25.0 | — | — | — | — | — | 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 |
| Chromium (total) Heavy metal |
4.05 ppb | — | 100.0 | — | — | — | — | Below guideline |
| Fluoride Inorganic |
0.15 ppm | — | 4.0 | 1.5 | 1.5 | — | — | Below guideline |
| Lithium Other |
11.5 ppb | — | — | — | — | — | — | Below guideline |
| Silver Other |
3.5 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 (4th ed.), California OEHHA PHGs, EWG Tap Water Database.
NEW IBERIA WATER SYSTEM (LAWCO) service area
This water system serves 1 community in Iberia Parish County, Louisiana. Click any city for its dedicated tap water quality page.
Find the right filter for BATON ROUGE water
Browse filter categories by water-quality concern. Each option below is NSF-certified for the matched contaminant type.