OHA Drinking Water Services
OR41
PWS ID: 00558 ---- CHEHALEM VALLEY WATER ASSN
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
Mar 01, 2026 DIST-A 1 1 0.03 0.2Y
Feb 01, 2026 DIST-A 1 1 0.09 0.3Y
Jan 01, 2026 DIST-A 1 1 0.09 0.3Y
Dec 01, 2025 DIST-A 1 1 0 0.3Y
Nov 01, 2025 DIST-A 1 1 0.35 0.3Y
Oct 01, 2025 DIST-A 1 1 0.3 0.3Y
Sep 01, 2025 DIST-A 1 1 0.18 0.3Y
Aug 01, 2025 DIST-A 1 1 0.31 0.3Y
Jul 01, 2025 DIST-A 1 1 0.76 0.3Y
Jun 01, 2025 DIST-A 1 1 0.57 0.2Y
May 01, 2025 DIST-A 1 1 0.12 0.2Y
Apr 01, 2025 DIST-A 1 1 0.19 0.2Y
Mar 01, 2025 DIST-A 1 0 0.2Y
Feb 01, 2025 DIST-A 1 1 0.27 0.2Y
Jan 01, 2025 DIST-A 1 1 0.16 0.1Y
Dec 01, 2024 DIST-A 1 2 0.06 0.1Y
Nov 01, 2024 DIST-A 1 1 0.13 0.2Y
Oct 01, 2024 DIST-A 1 1 0.2 0.2Y