OHA Drinking Water Services
OR41
PWS ID: 00058 ---- WILLOW DALE WATER DISTRICT
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
7/26/2023  5 3 years 0 0.241
7/26/2023  8/18/2023 5 3 years 0 0.241
7/15/2020  5 3 years 0 0.159
7/15/2020  7/27/2020 5 3 years 0 0.159
9/6/2017  5 3 years 0 0.128
9/6/2017  9/25/2017 5 3 years 0.0020 0.128
9/24/2014  5 3 years 0 0.148
9/24/2014  10/14/2014 5 3 years 0 0.148
9/7/2011  9/23/2011 5 3 years 0.0075 0.135
10/14/2008  -  10/16/200811/20/2008 5 3 years 0.0010 0.390
1/1/2000  -  10/12/200010/31/2000 5 1 year 0.0030 0.620
1/1/1999  -  6/10/19996/28/1999 5 6 months 0.0010 0.390
1/1/1995  -  1/10/19952/13/1995 5 6 months 0.0082 1.090


More information for this water system: SDWIS ID 4026
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