OHA Drinking Water Services
OR41
PWS ID: 90550 ---- BONANZA HIGH/ELEM SCHOOLS
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
9/19/2023  10/2/2023 5 3 years 0.0012 0.055
9/29/2020  10/7/2020 5 3 years 0.0019 0.058
9/27/2017  10/6/2017 10 3 years 0.0048 0.035
8/26/2014  9/5/2014 10 3 years 0.0044 0.052
9/30/2011  10/21/2011 10 3 years 0.0031 0.022
3/1/2004  4/5/2004 5 3 years 0.0035 0.010
1/1/2001  -  7/17/20018/6/2001 10 1 year 0 0
1/1/1998  -  9/29/199811/3/1998 10 1 year 0 0.050
1/1/1994  -  6/8/19947/11/1994 20 6 months 0.0020 0.050
7/1/1993  -  11/17/19937/11/1994 20 6 months 0.0030 0.130


More information for this water system: SDWIS ID 698
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