Drinking Water Systems in RIDDLE, Oregon
5 water systems are reported for this city, with a combined service population of 2,014. The systems have 42 EPA violation records in the five-year period ending June 30, 2026.
Water Systems Serving RIDDLE
LAWSON ACRES WATER ASSOCIATION
75 served442 historical records13 recent
D
WINCHESTER RIDGE
50 served0 historical records
A
RIDDLE, CITY OF
1,224 served75 historical records20 recent
C
SOUTH UMPQUA WATER ASSOCIATION
575 served22 historical records3 recent
C
DIAMOND LAKE LODGE/RESORT
90 served133 historical records6 recent
C
EPA Contaminant Categories in Historical Violation Records
Surface Water Treatment Rule121 records
Coliform (TCR)79 records
Interim Enhanced Surface Water Treatment Rule53 records
Haloacetic Acids (HAA5)36 records
Total Trihalomethanes (TTHMs)29 records
Consumer Confidence Rule26 records
Nitrate16 records
Public Notice16 records
Gross Alpha15 records
Revised Total Coliform Rule14 records
Category counts aggregate historical compliance records across listed systems. They do not show current concentrations or household test results.