OHA Drinking Water Services
OR41
PWS ID: 00239 ---- LONDON WATER CO-OP
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
9/14/2025  -  9/15/20259/19/2025 5 3 years 0.0049 0.104
9/20/2022  9/28/2022 5 3 years 0.0029 0
9/25/2019  -  9/26/201910/1/2019 5 3 years 0.0010 0
8/6/2016  -  8/10/20168/25/2016 5 3 years 0.0041 0
8/16/2013  8/23/2013 5 3 years 0 0.007
9/7/2010  9/20/2010 5 3 years 0 0.019
8/6/2004  9/10/2004 5 3 years 0 0
1/1/2000  -  7/15/200010/2/2000 5 1 year 0.0011 0.063
1/1/1999  -  8/23/19994/3/2000 5 1 year 0 0.053
1/1/1998  -  9/22/199811/7/1998 5 1 year 0.0077 0.328
1/1/1997  -  6/20/19979/9/1997 5 6 months 0.0042 0.260
7/1/1993  -  9/22/199311/10/1993 5 6 months 0.0031 0.160


More information for this water system: SDWIS ID 3944
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