OHA Drinking Water Services
OR41
PWS ID: 91716 ---- TANGENT ELEMENTARY
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
1/10/2025  1/24/2025 10 6 months 0 0.503
8/29/2024  9/6/2024 10 6 months 0.0037 0.257
4/30/2024  5/10/2024 7 6 months 0.0008 0.353
10/20/2023  10/26/2023 10 6 months 0.0028 0.405
2/22/2023  2/24/2023 5 6 months 0 0.245
7/13/2022  7/18/2022 10 6 months 0.0044 0.430
9/21/2018  10/1/2018 5 3 years 0.0039 0.374
6/3/2015  6/22/2015 5 3 years 0.0074 0.210
8/9/2012  8/29/2012 5 3 years 0.0083 0.210
10/23/2009  11/4/2009 5 3 years 0.0032 0.130
9/27/2006  10/2/2006 5 3 years 0 0
5/1/2003  6/9/2003 5 3 years 0 0
1/1/2001  -  8/21/20019/20/2001 5 1 year 0.0040 0.070
1/1/1999  -  11/4/19992/24/2000 5 1 year 0.0175 1.044
1/1/1998  -  8/21/19989/29/1998 5 1 year 0.0100 1.130
7/1/1995  -  12/18/19952/8/1996 10 6 months 0.0050 0.010
7/1/1993  -  12/20/19931/13/1994 10 6 months 0.0050 0


More information for this water system: SDWIS ID 1001
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