St. Charles Parish, LA
drinking water quality
50,400 residents · 1 public water system · 9 ZIP codes
EPA sampled 1 of 1 public water system here, together serving about 52,879 people. EPA detected PFBA at 13.6 ng/L. EPA has not set a drinking water limit for PFBA, so there is no figure to compare it against. Last sampled 7/11/2023.
What this means
PFAS are industrial chemicals that EPA describes as breaking down only very slowly in the environment. In April 2024 EPA set the first enforceable national limits: 4 ng/L for PFOA and PFOS, 10 ng/L for PFHxS, PFNA and GenX.
These figures are county-level and come from EPA’s sampling of public water systems. They describe the worst result found in the county, not what comes out of any particular tap — that depends on which system serves the address, and on the plumbing in the building. A private well is not covered by this programme at all.
ZIP codes in St. Charles Parish
70030 · 70031 · 70039 · 70047 · 70057 · 70070 · 70079 · 70080 · 70087
Readings are parish-level, so every ZIP here shares the figure above. Search your ZIP on the map to see it in context.