OHA Drinking Water Services
OR41
PWS ID: 91712 ---- SEVEN OAK MIDDLE SCHOOL
Lead & Copper

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Summary Results
Detailed Results
Corrosion Control
Service Lines
90th Percentile Summary Results

Sample Dates Date
Received		 Sample
Count		 Frequency Lead
(mg/L)		 Copper
(mg/L)		 Consumer
Notice Date
7/8/2025  7/11/2025 20 6 months 0 0.489
1/14/2025  1/17/2025 20 6 months 0.0024 0.717
7/9/2024  7/12/2024 20 6 months 0.0033 0.551
1/9/2024  1/19/2024 20 6 months 0 0.574
7/11/2023  7/21/2023 20 6 months 0 0.626
3/28/2023  4/7/2023 19 6 months 0.0032 0.679
8/9/2022  8/17/2022 20 6 months 0 0.320
6/14/2022  6/21/2022 20 6 months 0.0035 0.338
7/12/2021  7/20/2021 20 3 years 0.0034 0.118
7/12/2021  7/20/2021 20 6 months 0.0034 0.118
6/8/2020  6/16/2020 10 3 years 0.0024 0.561
6/27/2017  7/10/2017 10 3 years 0.0061 0.410
4/8/2014  4/23/2014 20 6 months 0 0.320
7/2/2013  -  12/10/201312/31/2013 20 6 months 0.0036 0.430
6/7/2012  -  6/11/20127/5/2012 10 3 years 0.0584 0.460
6/6/2009  7/1/2009 5 3 years 0 0.625
8/15/2006  8/29/2006 5 3 years 0 0.820
1/1/2001  -  6/11/20017/19/2001 5 1 year 0.0015 0
1/1/2000  -  6/6/20008/23/2000 10 6 months 0.0089 0.027
1/1/1999  -  6/1/19998/31/1999 10 6 months 0.0040 0.068
1/1/1998  -  11/13/199812/15/1998 5 1 year 0.0058 0.061
1/1/1996  -  1/8/19965/28/1996 10 6 months 0.0036 0.340
7/1/1993  -  12/27/19931/13/1994 10 6 months 0.0170 0.395


More information for this water system: SDWIS ID 998
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