OHA Drinking Water Services
OR41
PWS ID: 94558 ---- COOS CO PKS - WEST LAVERNE
Surface Water Treatment Rule

MRDL Summary

Abbreviations:  CFE = Combined filter effluent, CT = Contact time, IFE = Individual filter effluent, MCL = Maximum contaminant level, MRDL = Maximum residual disinfection level, N = No (requirement was not met), WTP = Water treatment plant, Y = Yes (requirement was met).

Results not meeting criteria are outlined in red.

Monitoring
Period		 Date
Received		 Entry
Point		< CFE 95 %
Turbidity
MCL		< CFE Max
Turbidity
MCL		CT's
Required
Met		Chlorine
at Entry
Point		Membrane
Parameters
Met
Dec 01, 2025 (xlsx) Jan 09, 2026 WTP-AYYYY
Nov 01, 2025 (xlsx) Dec 04, 2025 WTP-AYYYY
Oct 01, 2025 (xlsx) Nov 03, 2025 WTP-AYYYY
Sep 01, 2025 (xlsx) Oct 09, 2025 WTP-AYYYY
Aug 01, 2025 (xlsx) Sep 06, 2025 WTP-AYYYY
Jul 01, 2025 (xlsx) Aug 10, 2025 WTP-AYYYY
Jun 01, 2025 (xlsx) Jul 14, 2025
Late
 WTP-AYYYY
Oct 01, 2024 (xls) Nov 01, 2024 WTP-AYYYY
Sep 01, 2024 (xls) Oct 01, 2024 WTP-AYYYY
Aug 01, 2024 (xls) Sep 04, 2024 WTP-AYYYY
Jul 01, 2024 (xls) Aug 03, 2024 WTP-AYYYY
Jun 01, 2024 (xls) Jul 03, 2024 WTP-AYYYY
May 01, 2024 (xls) Jun 04, 2024 WTP-AYYYY
Sep 01, 2023 (xls) Oct 02, 2023 WTP-AYYYY
Aug 01, 2023 (xls) Sep 01, 2023 WTP-AYYYY
Jul 01, 2023 (xls) Aug 01, 2023 WTP-AYYYY
Jun 01, 2023 (xls) Jul 01, 2023 WTP-AYYYY
Oct 01, 2022 (xls) Nov 09, 2022 WTP-AYYYY
Sep 01, 2022 (xls) Oct 03, 2022 WTP-AYYYY
Aug 01, 2022 (xls) Aug 31, 2022 WTP-AYYYY
Jul 01, 2022 (xls) Aug 03, 2022 WTP-AYYYY
Jun 01, 2022 (xls) Jul 05, 2022 WTP-AYYYY
May 01, 2022 (xls) Jun 06, 2022 WTP-AYYYY
Sep 01, 2021 (xls) Oct 07, 2021 WTP-AYYYY
Aug 01, 2021 (xls) Sep 07, 2021 WTP-AYYYY
Jul 01, 2021 (xls) Aug 05, 2021 WTP-AYYYY
Jun 01, 2021 (xls) Jul 07, 2021 WTP-AYYYY
May 01, 2021 (xls) Jun 08, 2021 WTP-AYYYY