OHA Drinking Water Services
OR41
PWS ID: 00203 ---- COLUMBIA CITY MUN WATERWORKS
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
Aug 01, 2025 DIST-A 2 0 0.6Y
Jul 01, 2025 DIST-A 2 2 0.67 0.6Y
Jun 01, 2025 DIST-A 2 2 0.565 0.6Y
May 01, 2025 DIST-A 2 2 0.5 0.6Y
Apr 01, 2025 DIST-A 2 2 0.66 0.7Y
Mar 01, 2025 DIST-A 2 2 0.66 0.7Y
Feb 01, 2025 DIST-A 2 2 0.69 0.7Y
Jan 01, 2025 DIST-A 2 2 0.74 0.7Y
Dec 01, 2024 DIST-A 2 2 0.72 0.6Y
Nov 01, 2024 DIST-A 2 2 0.53 0.6Y
Oct 01, 2024 DIST-A 2 2 0.66 0.7Y
 



More information for this water system: SDWIS ID 4031
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