OHA Drinking Water Services
OR41
PWS ID: 90873 ---- UMATILLA MARINA
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
Oct 01, 2025 DIST-A 1 1 0.42 0.4Y
Jul 01, 2025 DIST-A 1 1 0.45 0.4Y
Apr 01, 2025 DIST-A 1 1 0.43 0.4Y
Oct 01, 2024 DIST-A 1 1 0.33 0.3Y