OHA Drinking Water Services
OR41
PWS ID: 95613 ---- HILLSBORO LANDFILL
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
8/6/2025  8/14/2025 5 1 year 0.0007 0.200
8/14/2024  8/21/2024 5 1 year 0.0003 0.120
8/16/2023  9/8/2023 5 1 year 0 0.063
7/6/2022  8/5/2022 5 6 months 0 0.150
1/6/2022  1/14/2022 5 6 months 0 0.057
7/8/2021  7/15/2021 5 6 months 0 0.092
1/7/2021  1/14/2021 5 6 months 0 0.042
8/12/2020  8/20/2020 5 6 months 0 0.020
2/26/2020  3/23/2020 5 6 months 0 0.008
12/3/2019  12/18/2019 5 6 months 0 0.019


More information for this water system: SDWIS ID 5496
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