OHA Drinking Water Services
OR41
PWS ID: 00229 ---- RIDGEWOOD DIST IMPROV CO
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
6/2/2024  -  6/3/2024 5 3 years 0 0.165
6/2/2024  -  6/3/20246/13/2024 5 3 years 0.0021 0.165 6/28/2024
6/1/2021  5 3 years 0 0.122
6/1/2021  6/14/2021 5 3 years 0.0022 0.122 7/23/2021
6/12/2018  5 3 years 0 0.109
6/12/2018  6/25/2018 5 3 years 0.0010 0.109 7/18/2018
6/1/2015  -  6/2/2015 5 3 years 0 0.151
6/1/2015  -  6/2/20156/22/2015 5 3 years 0.0020 0.151
6/1/2012  5 3 years 0 0.150
6/1/2012  6/13/2012 5 3 years 0 0.150
6/1/2009  6/9/2009 5 3 years 0 0.160
6/1/2006  6/8/2006 5 3 years 0 0.140
6/2/2003  6/16/2003 5 3 years 0.0030 0.150
1/1/1999  -  6/12/20006/27/2000 5 3 years 0.0030 0.200
1/1/1997  -  9/5/199710/27/1997 5 1 year 0.0027 0.110
1/1/1996  -  6/11/19968/5/1996 5 1 year 0 0.540
1/1/1995  -  9/9/199512/15/1995 5 1 year 0.0045 0.112
1/1/1994  -  3/22/19944/18/1994 10 6 months 0.0020 0.230
7/1/1993  -  8/24/199310/14/1993 10 6 months 0.0029 0.140


More information for this water system: SDWIS ID 4120
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