OHA Drinking Water Services
OR41
PWS ID: 00265 ---- TWIN ISLAND COMMUNITY
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
8/15/2021  -  8/17/20218/25/2021 5 3 years 0.0025 0.074
6/15/2018  7/2/2018 5 3 years 0.0035 0.050
8/21/2014  -  8/30/20149/18/2014 5 3 years 0 0.044
9/4/2011  -  9/13/201110/5/2011 7 3 years 0 0.091
11/4/2008  11/20/2008 5 3 years 0.0005 0.087
8/16/2005  -  8/22/20059/9/2005 5 3 years 0.0005 0.123
7/7/2002  -  7/10/20028/1/2005 5 3 years 0.0055 0.021
1/1/1998  -  9/23/199810/7/1998 5 1 year 0.0010 0.140
1/1/1997  -  7/10/19978/28/1997 5 1 year 0 0.190
1/1/1996  -  3/6/19964/2/1996 5 1 year 0.0021 0.315
1/1/1994  -  6/4/19947/14/1994 5 6 months 0 0.090
7/1/1993  -  7/26/19939/12/1993 5 6 months 0.0070 0.180


More information for this water system: SDWIS ID 3287
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