OHA Drinking Water Services
OR41
PWS ID: 01172 ---- WESTERN HILLS MH ESTATES
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
6/5/2025  7/25/2025 2 1 year 0 0.025
9/26/2024  -  9/30/202410/8/2024 12 1 year 0.0046 0.014
4/11/2023  -  5/5/20236/26/2023 11 6 months 0.0030 0.821 6/14/2023
9/27/2022  -  9/29/202212/16/2022 10 6 months 0 0 10/14/2022
6/25/2022  -  6/30/2022 7 3 years 0.0020 0
8/8/2020  -  8/27/20209/25/2020 5 3 years 0.0250 0.133 9/21/2020
8/23/2017  11/13/2017 5 3 years 0.0020 0.139
9/1/2014  1/15/2015 5 3 years 0.0050 0.140
6/14/2011  -  7/26/20117/7/2011 5 3 years 0.0030 0.207
8/23/2007  12/11/2007 5 3 years 0.0020 0
9/9/2004  12/23/2004 5 3 years 0.0035 0.030
1/1/2001  -  8/23/200110/9/2001 5 1 year 0.0070 0.050
1/1/2000  -  5/4/20001/30/2001 5 1 year 0.0150 0.070
1/1/1997  -  11/19/199712/11/1997 5 1 year 0.0020 0.060
1/1/1994  -  6/21/19945/9/1995 10 6 months 0 0.030
7/1/1993  -  12/7/19936/21/1994 10 6 months 0.0020 0.050


More information for this water system: SDWIS ID 3566
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