OHA Drinking Water Services
OR41
PWS ID: 94203 ---- USACE JOHN DAY DAM
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
8/15/2022  8/25/2022 5 3 years 0.0017 0.008
9/18/2019  9/30/2019 5 3 years 0.0021 0.029
9/16/2015  9/28/2015 5 3 years 0.0025 0.018
8/1/2012  8/7/2012 5 3 years 0.0045 0.012
7/20/2011  7/27/2011 5 3 years 0.0056 0.017
8/19/2010  9/8/2010 5 1 year 0.0068 0.017
8/7/2009  9/8/2009 10 1 year 0.0045 0.012
7/10/2008  8/7/2008 5 1 year 0.0005 0.001
6/20/2007  8/3/2007 5 1 year 0.0030 0.011
11/15/2005  12/27/2005 5 1 year 0.0145 0.013
7/1/1994  -  12/29/19941/31/1995 5 6 months 0.0006 0.012
1/1/1994  -  2/18/19949/8/1994 5 6 months 0.0030 0.142


More information for this water system: SDWIS ID 1643
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