OHA Drinking Water Services
OR41
PWS ID: 00807 ---- SENECA, CITY OF
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
7/17/2025  7/31/2025 5 3 years 0.0010 0.018
9/19/2023  -  9/21/202310/6/2023 4 3 years 0.0023 0.009
9/1/2020  -  9/2/20209/21/2020 5 3 years 0.0026 0.008
7/11/2017  7/21/2017 5 3 years 0.0030 0.045
7/1/2014  7/24/2014 5 3 years 0.0020 0.025
7/26/2011  7/30/2011 5 3 years 0.0030 0.010
9/16/2008  10/30/2008 5 3 years 0.0020 0.023
12/28/2005  6/15/2006 5 3 years 0.0090 0.130
10/15/2002  11/18/2002 5 1 year 0 0.014
1/1/1997  -  12/10/19978/27/2002 5 1 year 0.0010 0.013
1/1/1995  -  12/5/19951/16/1996 5 1 year 0 0
7/1/1994  -  7/20/19948/8/1994 10 6 months 0 0
7/1/1993  -  11/2/199311/22/1993 10 6 months 0 0


More information for this water system: SDWIS ID 3790
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