OHA Drinking Water Services
OR41
PWS ID: 95630 ---- COLUMBIA HELICOPTERS
Lead & Copper

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90th Percentile Summary Results

Sample Dates Date
Received		 Sample
Count		 Frequency Lead
(mg/L)		 Copper
(mg/L)		 Consumer
Notice Date
9/11/2025  9/22/2025 10 6 months 0.0006 0.005
3/21/2025  4/1/2025 10 6 months 0 0
8/15/2024  8/28/2024 10 6 months 0 0
3/28/2024  4/11/2024 10 6 months 0 0.005
11/9/2023  11/27/2023 10 6 months 0.0013 0.022
3/17/2023  3/29/2023 10 6 months 0.0015 0.015
8/3/2022  -  11/30/202212/22/2022 11 6 months 0.0033 0.031
7/20/2021  7/29/2021 1 6 months 0.0058 0
6/22/2021  7/2/2021 10 6 months 0.0057 0.044
7/14/2020  10/8/2020 2 6 months 0 0
4/14/2020  9/3/2020 1 6 months 0 0


More information for this water system: SDWIS ID 5520
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