OHA Drinking Water Services
OR41
PWS ID: 94328 ---- KNIFE RIVER - NW TANGENT
Lead & Copper

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Summary Results
Detailed Results
Corrosion Control
Service Lines
90th Percentile Summary Results

Sample Dates Date
Received		 Sample
Count		 Frequency Lead
(mg/L)		 Copper
(mg/L)		 Consumer
Notice Date
8/6/2024  8/16/2024 5 3 years 0.0006 0.183
6/16/2021  7/22/2021 5 3 years 0.0046 0.920
7/11/2018  5 3 years 0.0049 0
7/31/2017  9/1/2017 5 3 years 0.0035 0.554
8/29/2014  9/29/2014 5 3 years 0.0020 0.457
8/24/2011  9/14/2011 5 3 years 0 0.617
7/29/2008  9/15/2008 5 3 years 0 0.760
9/27/2004  12/2/2004 5 3 years 0 0.425
1/1/1999  -  9/18/200110/11/2001 5 3 years 0 0.314
1/1/1998  -  9/18/199811/3/1998 5 1 year 0 0.371
1/1/1997  -  6/26/19978/11/1997 5 1 year 0.0012 0.694
1/1/1996  -  6/20/19967/11/1996 5 1 year 0.0046 0.721
1/1/1994  -  6/9/19946/24/1994 5 6 months 0.0028 0.740
7/1/1993  -  12/2/19931/19/1994 5 6 months 0.0017 1.000


More information for this water system: SDWIS ID 1717
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