LANCASTER WATER DEPT
LANCASTER, NH · 2,500 people served · EPA PWSID NH1291010
LANCASTER WATER DEPT (LANCASTER, NH), which serves about 2,500 people, has recorded 1 health-based drinking-water contaminant in EPA violation records since 2016, most notably Haloacetic Acids (HAA5). A certified water filter can reduce these at the tap — see the certified options for each below.
What the testing found
Measured levels from EPA violation records, compared to the federal limit (MCL). The black line marks the legal limit.
Haloacetic Acids
1.6× the federal limitChlorination byproduct; MCL 60 ug/L. Cancer and developmental concern.
What to do about it
A certified point-of-use filter is the most direct fix for most of these contaminants. Match the filter to what's actually in your water — a filter certified for lead may do nothing for PFAS or fluoride.
Want certainty about your tap specifically (not just the system)? A certified mail-in lab test is the gold standard — system-wide records can differ from your home's plumbing. Some links above are affiliate links — see our disclosure.
Sources & method. Contaminant levels and violations come from EPA's Safe Drinking Water Information System (health-based violations, 2016–present); PFAS from EPA UCMR5 monitoring (2023–2025). Levels shown are the highest recorded value in the violation records; a violation means the contaminant exceeded its federal limit at the system level. Your home's water can differ from the system average. Public domain data; we are not affiliated with the EPA.