OHA Drinking Water Services
OR41
PWS ID: 01361 ---- RAINBOW ROCK SERVICE ASSOCIATION
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
8/19/2025  -  8/27/20259/16/2025 5 3 years 0.0022 0.087
8/4/2022  8/18/2022 5 3 years 0.0008 0.053
6/18/2019  7/2/2019 5 3 years 0.0008 0.030
9/13/2016  9/22/2016 5 3 years 0.0013 0.024
7/30/2013  8/12/2013 5 3 years 0.0007 0.023
8/11/2010  9/8/2010 5 3 years 0.0005 0.021
1/10/2007  2/8/2007 5 3 years 0.0019 0.073
4/21/2004  -  4/22/20045/7/2004 5 3 years 0.0004 0.053
1/1/1999  -  6/18/20017/11/2001 5 3 years 0 0
1/1/1998  -  3/20/19985/4/1998 5 1 year 0 0
1/1/1996  -  7/25/19969/11/1996 5 1 year 0 0
1/1/1995  -  8/25/199510/6/1995 5 1 year 0 0.040
1/1/1994  -  4/12/19948/1/1994 5 6 months 0 0.100
7/1/1993  -  7/20/19939/7/1993 5 6 months 0.0145 0.160


More information for this water system: SDWIS ID 4014
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