Drinking Water Systems in Twisp, Washington
1 water system are reported for this city, with a combined service population of 1,173. The systems have 2 EPA violation records in the five-year period ending June 30, 2026.
Water Systems Serving Twisp
EPA Contaminant Categories in Historical Violation Records
Coliform (TCR)9 records
Nitrate7 records
Endrin1 record
BHC-GAMMA1 record
Simazine1 record
Di(2-ethylhexyl) phthalate1 record
Hexachlorocyclopentadiene1 record
Atrazine1 record
Gross Alpha1 record
Selenium1 record
Category counts aggregate historical compliance records across listed systems. They do not show current concentrations or household test results.