Union County, IA
drinking water quality
11,955 residents · 2 public water systems · 6 ZIP codes
EPA sampled 2 of 2 public water systems here, together serving about 28,329 people. EPA detected PFBA at 5.1 ng/L. EPA has not set a drinking water limit for PFBA, so there is no figure to compare it against. Last sampled 7/10/2023.
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 Union County
50254 · 50801 · 50830 · 50831 · 50842 · 50861
Readings are county-level, so every ZIP here shares the figure above. Search your ZIP on the map to see it in context.