OHA Drinking Water Services
OR41
PWS ID: 93925 ---- WASHINGTON CO PKS - HAGG LAKE
Maximum Residual Disinfection Level (MRDL) Samples
MRDL Monitoring Requirements :: Excel Spreadsheet

Monitoring
Period
Entry
Point
Samples
Required
Samples
Collected
Period
Avg
Annual
Avg
Level
Compliance
Jan 01, 2026 DIST-A 1 1 1.1 1.4Y
Oct 01, 2025 DIST-A 1 1 2.3 1.3Y
Jul 01, 2025 DIST-A 1 1 1.7 0.9Y
Apr 01, 2025 DIST-A 1 1 0.5 0.6Y
Jan 01, 2025 DIST-A 1 1 0.8 0.7Y
Oct 01, 2024 DIST-A 1 1 0.6 0.6Y