OHA Drinking Water Services
OR41
PWS ID: 00657 ---- PORTLAND WATER BUREAU
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
Jan 01, 2026 (pdf) Feb 09, 2026 WTP-AYYYY
Dec 01, 2025 (pdf) Jan 08, 2026 WTP-AYYYY
Nov 01, 2025 (pdf) Dec 09, 2025 WTP-AYYYY
Oct 01, 2025 (pdf) Nov 07, 2025 WTP-AYYYY
Sep 01, 2025 (pdf) Oct 09, 2025 WTP-AYYYY
Aug 01, 2025 (pdf) Sep 09, 2025 WTP-AYYYY
Jul 01, 2025 (pdf) Aug 07, 2025 WTP-AYYYY
Jun 01, 2025 (pdf) Jul 09, 2025 WTP-AYYYY
May 01, 2025 (pdf) Jun 06, 2025 WTP-AYYYY
Apr 01, 2025 (pdf) May 08, 2025 WTP-AYYYY
Mar 01, 2025 (pdf) Apr 09, 2025 WTP-AYYYY
Feb 01, 2025 (pdf) Mar 06, 2025 WTP-AYYYY
Jan 01, 2025 (pdf) Feb 06, 2025 WTP-AYYYY
Dec 01, 2024 (pdf) Jan 09, 2025 WTP-AYYYY
Nov 01, 2024 (pdf) Dec 09, 2024 WTP-AYYYY
Oct 01, 2024 (pdf) Nov 07, 2024 WTP-AYYYY
Sep 01, 2024 (pdf) Oct 09, 2024 WTP-AYYYY
Aug 01, 2024 (pdf) Sep 09, 2024 WTP-AYYYY
Jul 01, 2024 (pdf) Aug 08, 2024 WTP-AYYYY
Jun 01, 2024 (pdf) Jul 09, 2024 WTP-AYYYY
May 01, 2024 (pdf) Jun 07, 2024 WTP-AYYYY
Apr 01, 2024 (pdf) May 09, 2024 WTP-AYYYY
Mar 01, 2024 (pdf) Apr 09, 2024 WTP-AYYYY
Feb 01, 2024 (pdf) Mar 07, 2024 WTP-AYYYY
Jan 01, 2024 (pdf) Feb 08, 2024 WTP-AYYYY
Dec 01, 2023 (pdf) Jan 09, 2024 WTP-AYYYY
Nov 01, 2023 (pdf) Dec 08, 2023 WTP-AYYYY
Oct 01, 2023 (pdf) Nov 09, 2023 WTP-AYYYY
Sep 01, 2023 (pdf) Oct 09, 2023 WTP-AYYYY
Aug 01, 2023 (pdf) Sep 08, 2023 WTP-AYYYY
Jul 01, 2023 (pdf) Aug 09, 2023 WTP-AYYYY
Jun 01, 2023 (pdf) Jul 10, 2023 WTP-AYYYY
May 01, 2023 (pdf) Jun 09, 2023 WTP-AYYYY
Apr 01, 2023 (pdf) May 09, 2023 WTP-AYYYY
Mar 01, 2023 (pdf) Apr 07, 2023 WTP-AYYYY
Feb 01, 2023 (pdf) Mar 09, 2023 WTP-AYYYY
Jan 01, 2023 (pdf) Feb 09, 2023 WTP-AYYYY
Dec 01, 2022 (pdf) Jan 09, 2023 WTP-AYYYY
Nov 01, 2022 (pdf) Dec 09, 2022 WTP-AYYYY
Oct 01, 2022 (pdf) Nov 09, 2022 WTP-AYYYY
Sep 01, 2022 (pdf) Oct 07, 2022 WTP-AYYYY
Aug 01, 2022 (pdf) Sep 09, 2022 WTP-AYYYY
Jul 01, 2022 (pdf) Aug 09, 2022 WTP-AYYYY
Jun 01, 2022 (pdf) Jul 08, 2022 WTP-AYYYY
May 01, 2022 (pdf) Jun 09, 2022 WTP-AYYYY
Apr 01, 2022 (pdf) May 09, 2022 WTP-AYYYY
Mar 01, 2022 (pdf) Apr 07, 2022 WTP-AYYYY
Feb 01, 2022 (pdf) Mar 09, 2022 WTP-AYYYY
Jan 01, 2022 (pdf) Feb 09, 2022 WTP-AYYYY
Dec 01, 2021 (pdf) Jan 07, 2022 WTP-AYYYY
Nov 01, 2021 (pdf) Dec 09, 2021 WTP-AYYYY
Oct 01, 2021 (pdf) Nov 05, 2021 WTP-AYYYY
Sep 01, 2021 (pdf) Oct 07, 2021 WTP-AYYYY
Aug 01, 2021 (pdf) Sep 09, 2021 WTP-AYYYY
Jul 01, 2021 (pdf) Aug 09, 2021 WTP-AYYYY
Jun 01, 2021 (pdf) Jul 08, 2021 WTP-AYYYY
May 01, 2021 (pdf) Jun 09, 2021 WTP-AYYYY
Apr 01, 2021 (pdf) May 07, 2021 WTP-AYYYY
Mar 01, 2021 (pdf) Apr 08, 2021 WTP-AYYYY
Feb 01, 2021 (pdf) Mar 09, 2021 WTP-AYYYY
Jan 01, 2021 (pdf) Feb 09, 2021 WTP-AYYYY