Water Quality Report · Updated May 12, 2026
LAFOURCHE WATER DISTRICT 1
LAFOURCHE WATER DISTRICT 1 delivers tap water graded C (67/100) by TapWaterSafety.org. The utility serves approximately 81,609 residents in LOCKPORT, Louisiana using surface water. 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. For questions, the utility can be reached at 985-532-6924.
Is LOCKPORT tap water safe to drink?
LAFOURCHE WATER DISTRICT 1 delivers tap water that earns a grade of C (67/100) from TapWaterSafety.org — an average rating, with several contaminants above health guidelines but generally compliant with US legal limits.
The utility serves 81,609 residents in LOCKPORT, drawing from surface water. 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), Haloacetic acids (HAA5), Total trihalomethanes (TTHMs), Dichloroacetic acid, Bromodichloromethane, Trichloroacetic acid, Dibromoacetic acid, Chloroform, Nitrate and nitrite, Dibromochloromethane, Atrazine, Chromium (hexavalent), Radium, combined (-226 and -228), Chlorate. 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 LOCKPORT residents
Top concerns in this water
Based on the most recent EPA and EWG data, these are the most significant water quality issues for LAFOURCHE WATER DISTRICT 1.
Haloacetic acids (HAA9) significantly above health guideline
Moderate concernHaloacetic acids (HAA9) detected at 28.6 ppb, 477x above the EWG health guideline of 0.06 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.
Total trihalomethanes (TTHMs) significantly above health guideline
Moderate concernTotal trihalomethanes (TTHMs) detected at 19.5 ppb, 130x above the EWG health guideline of 0.15 ppb.
Contact LAFOURCHE WATER DISTRICT 1
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 LOCKPORT
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.
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 67/100 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 |
28.6 ppb | 0.06 | — | — | — | — | — | 477× over |
| Haloacetic acids (HAA5) Disinfection byproduct |
30.6 ppb | 0.1 | 60.0 | 60 | — | — | — | 306× over |
| Total trihalomethanes (TTHMs) Disinfection byproduct |
19.5 ppb | 0.15 | 80.0 | 100 | — | — | — | 130× over |
| Dichloroacetic acid Disinfection byproduct |
21.9 ppb | 0.2 | — | — | — | — | — | 110× over |
| Bromodichloromethane Disinfection byproduct |
3.79 ppb | 0.06 | — | — | — | — | — | 63× over |
| Trichloroacetic acid Disinfection byproduct |
5.14 ppb | 0.1 | — | — | — | — | — | 51× over |
| Dibromoacetic acid Disinfection byproduct |
1.16 ppb | 0.03 | — | — | — | — | — | 39× over |
| Chloroform Disinfection byproduct |
15.2 ppb | 0.4 | — | — | — | — | — | 38× over |
| Nitrate and nitrite Inorganic |
0.967 ppm | 0.14 | 10.0 | 11.3 | 11.3 | 10 | — | 6.9× over |
| Dibromochloromethane Disinfection byproduct |
0.556 ppb | 0.1 | — | — | — | — | — | 5.6× over |
| Atrazine Pesticide/Herbicide |
0.246 ppb | 0.1 | 3.0 | 0.1 | 100 | 0.15 | — | Fails EU |
| Chromium (hexavalent) Heavy metal |
0.0463 ppb | 0.02 | — | — | — | — | — | 2.3× over |
| Radium, combined (-226 and -228) Radiological |
0.08 pCi/L | 0.05 | 5.0 | — | — | — | — | 1.6× over |
| Chlorate Disinfection byproduct |
276.9 ppb | 210.0 | — | — | — | — | — | 1.3× over |
| 1,4-Dioxane Semi-volatile organic compound |
0.113 ppb | 0.35 | — | — | 50 | 1 | — | Below guideline |
| Aluminum Heavy metal |
146.7 ppb | 600.0 | — | 200 | — | 600 | — | Below guideline |
| Simazine Pesticide/Herbicide |
0.0178 ppb | 0.1 | 4.0 | — | — | — | — | Below guideline |
| Manganese Heavy metal |
11.2 ppb | 100.0 | — | 50 | 80 | — | — | Below guideline |
| Vanadium Other |
1.43 ppb | 21.0 | — | — | — | — | — | Below guideline |
| Monochloroacetic acid Disinfection byproduct |
2.0 ppb | 53.0 | — | — | — | — | — | Below guideline |
| Molybdenum Other |
1.31 ppb | 40.0 | — | — | — | — | — | Below guideline |
| Monobromoacetic acid Disinfection byproduct |
0.256 ppb | 25.0 | — | — | — | — | — | Below guideline |
| 2,4-D Pesticide/Herbicide |
0.0833 ppb | 20.0 | 70.0 | — | — | — | — | Below guideline |
| Perfluorobutanoic Acid (PFBA) PFAS |
2.67 ppt | 1000.0 | — | — | — | — | — | Below guideline |
| Strontium Radiological |
0.151 ppb | 1500.0 | — | — | — | — | — | Below guideline |
| Fluoride Inorganic |
0.573 ppm | — | 4.0 | 1.5 | 1.5 | — | — | 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.
LAFOURCHE WATER DISTRICT 1 service area
This water system serves 1 community in Lafourche Parish County, Louisiana. Click any city for its dedicated tap water quality page.
Find the right filter for LOCKPORT water
Browse filter categories by water-quality concern. Each option below is NSF-certified for the matched contaminant type.