OHA Drinking Water Services
OR41
PWS ID: 93668 ---- MADRONA 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
7/11/2024  5 3 years 0 0.419
7/11/2024  7/25/2024 5 3 years 0.0015 0.419
7/21/2021  5 3 years 0 0.404
7/21/2021  8/2/2021 5 3 years 0.0008 0.404
6/18/2018  5 3 years 0 0.225
6/18/2018  7/7/2018 5 3 years 0.0008 0.225
8/10/2015  5 3 years 0 0.073
8/10/2015  9/1/2015 5 3 years 0 0.073
9/28/2012  10/5/2012 5 3 years 0 0.185
9/9/2009  10/19/2009 5 3 years 0.0008 0.125
9/20/2006  11/20/2006 5 3 years 0.0010 0.109
7/9/2003  9/8/2003 5 3 years 0 0.030
1/1/1999  -  12/13/20001/2/2001 5 3 years 0.0020 0.280
1/1/1997  -  6/3/19977/7/1997 5 1 year 0.0015 0.340
1/1/1996  -  6/6/19967/22/1996 5 1 year 0.0011 0.200
7/1/1995  -  12/20/19951/17/1996 10 6 months 0.0080 0.380
1/1/1995  -  6/13/19957/3/1995 10 6 months 0.0010 0.180
1/1/1994  -  12/14/19941/9/1995 10 6 months 0.0020 0.280
1/1/1994  -  6/16/19949/12/1994 10 6 months 0.0310 0.670
7/1/1993  -  7/23/199310/13/1993 10 6 months 0.0010 0.360


More information for this water system: SDWIS ID 1404
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