OHA Drinking Water Services
OR41
PWS ID: 94811 ---- KNIFE RIVER PRESTRESS INC
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
8/20/2024  9/17/2024 5 6 months 0.0027 0
3/26/2024  4/16/2024 5 6 months 0.0029 0.205
6/22/2022  5 3 years 0 0
6/16/2021  -  6/22/20227/18/2022 10 3 years 0.0066 0
6/16/2021  5 3 years 0.0259 0
7/11/2018  7/27/2018 5 3 years 0.0049 0
8/28/2015  9/21/2015 5 3 years 0.0147 0.058
6/21/2012  8/6/2012 5 3 years 0 0
7/24/2009  8/14/2009 5 3 years 0.0079 0
8/3/2006  7/14/2006 5 3 years 0 0
9/21/2004  10/25/2004 5 1 year 0.0065 0.006
1/1/1999  -  9/9/19999/23/1999 5 1 year 0.0050 0.005
1/1/1997  -  5/13/19975/27/1997 5 6 months 0 0.009
7/1/1994  -  11/29/19944/5/1995 5 6 months 0 0


More information for this water system: SDWIS ID 5
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