OHA Drinking Water Services
OR41
PWS ID: 00174 ---- KNOLL TERRACE PARK
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
8/8/2025  9/27/2025 5 3 years 0.0011 0.077
7/1/2022  7/8/2022 5 3 years 0.0114 0.045
8/28/2019  -  9/4/20199/17/2019 5 3 years 0.0030 0.114
9/28/2016  10/14/2016 5 3 years 0.0010 0.016
9/17/2013  9/27/2013 5 3 years 0.0040 0.036
8/11/2010  8/20/2010 5 3 years 0.0045 0.075
3/10/2005  -  3/11/20053/24/2005 5 3 years 0.0030 0.062
1/1/2000  -  10/6/20005/2/2001 5 1 year 0.0040 0.077
1/1/1999  -  10/8/19995/2/2001 5 1 year 0.0046 0
1/1/1998  -  12/14/19985/2/2001 5 1 year 0.0021 0.142
1/1/1996  -  11/8/199612/12/1996 5 1 year 0.0057 0.042
1/1/1994  -  6/12/19947/8/1994 10 6 months 0 0
7/1/1993  -  10/26/19933/9/1994 10 6 months 0.0020 0.030


More information for this water system: SDWIS ID 3262
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