OHA Drinking Water Services
OR41
PWS ID: 94523 ---- CORVALLIS MARKET
Water Quality Alerts

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Alert Date Range: From to
Alert Type
 Alert ID Sample Date Alert Date Contact
Report		 Response
Time (Days)		 Location Analyte
 Result
 Alert Level MCL Units Sample Type Lab Sample ID SelectAtype FilterAlertDate
NO3 ARCHIVE 10/12/1993 11/08/1993 AA NITRATE 5.6 5 10 MG/L 931012-082 Alert Chem NO30 1993-11-08
TCR ARCHIVE 01/11/1994 02/08/1994 COLIFORM (TCR) Present Present Routine 940111-070 Alert TCR0 1994-02-08
NO3 ARCHIVE 10/11/1994 10/28/1994 A NITRATE 6.7 5 10 MG/L 941011-061 Alert Chem NO30 1994-10-28
TCR ARCHIVE 01/10/1995 02/08/1995 COLIFORM (TCR) Present Present Routine 950110-057 Alert TCR0 1995-02-08
NO3 ARCHIVE 10/10/1995 10/25/1995 AA NITRATE 6.6 5 10 MG/L 951010-071 Alert Chem NO30 1995-10-25
NO3 ARCHIVE 10/08/1996 11/22/1996 AA NITRATE 5.8 5 10 MG/L 961008-055 Alert Chem NO30 1996-11-22
TCR ARCHIVE 01/14/1997 02/07/1997 COLIFORM (TCR) Present Present Routine 970114056 Alert TCR0 1997-02-07
NO3 ARCHIVE 04/08/1997 04/21/1997 AA NITRATE 6.9 5 10 MG/L 970408-059 Alert Chem NO30 1997-04-21
NO3 ARCHIVE 07/08/1997 08/08/1997 AA NITRATE 6.8 5 10 MG/L 970708-095 Alert Chem NO30 1997-08-08
TCR ARCHIVE 01/13/1998 02/10/1998 COLIFORM (TCR) Present Present Routine 980113062 Alert TCR0 1998-02-10
TCR ARCHIVE 01/26/1998 03/06/1998 COLIFORM (TCR) Present Present Repeat 98-A418 Alert TCR0 1998-03-06
TCR ARCHIVE 01/26/1998 03/06/1998 COLIFORM (TCR) Present Present Repeat 98-A419 Alert TCR0 1998-03-06
TCR ARCHIVE 01/26/1998 03/06/1998 COLIFORM (TCR) Present Present Repeat 98-A421 Alert TCR0 1998-03-06
NO3 ARCHIVE 04/14/1998 05/26/1998 AA NITRATE 6.1 5 10 MG/L 980414-066 Alert Chem NO30 1998-05-26
NO3 ARCHIVE 01/12/1999 02/24/1999 AA NITRATE 5.1 5 10 MG/L 990112-073 Alert Chem NO30 1999-02-24
NO3 ARCHIVE 04/11/2000 05/01/2000 AA NITRATE 5.8 5 10 MG/L 0000411063 Alert Chem NO30 2000-05-01
TCR ARCHIVE 01/08/2002 02/01/2002 COLIFORM (TCR) Present Present Routine 0020108028 Alert TCR0 2002-02-01
TCR ARCHIVE 01/08/2002 02/04/2002 COLIFORM (TCR) Present Present Routine 020108028 Alert TCR0 2002-02-04
TCR ARCHIVE 01/22/2002 02/05/2002 COLIFORM (TCR) Present Present Repeat 4049-2 Alert TCR0 2002-02-05
TCR ARCHIVE 01/22/2002 02/05/2002 COLIFORM (TCR) Present Present Repeat 4049-4 Alert TCR0 2002-02-05
TCR ARCHIVE 01/29/2002 02/04/2002 COLIFORM (TCR) Present Present Repeat 4076-4 Alert TCR0 2002-02-04
NO3 CHEM1041 10/12/2004 12/10/2004 EP-A NITRATE 6.1 5 10 MG/L 20041012-079 Alert Chem NO30 2004-12-10
NO3 CHEM1857 10/11/2005 12/19/2005 EP-A NITRATE 8.5 5 10 MG/L 20051011-089 Alert Chem NO30 2005-12-19
NO3 CHEM2458 04/10/2007 04/25/2007 EP-A NITRATE 5.7 5 10 MG/L 20070410082 Alert Chem NO30 2007-04-25
NO3 CHEM3639 07/15/2009 08/19/2009 EP-A NITRATE 6.4 5 10 MG/L 20090715045-I Alert Chem NO30 2009-08-19
NO3 CHEM4506 10/18/2010 11/01/2010 EP-A NITRATE 5 5 10 MG/L 20101018059-I Alert Chem NO30 2010-11-01
Notice - Source COLI11289 12/06/2012 12/11/2012 SRC-AA COLIFORM (TCR) Present Present Assessment 20121206046 Notice Source 2012-12-11
Notice - Source COLI12663 03/06/2014 03/12/2014 SRC-AA COLIFORM (TCR) Present Present Assessment 20140306060 Notice Source 2014-03-12
NO3 CHEM6382 07/10/2014 07/29/2014 07/30/2014 1 EP-A NITRATE 5.62 5 10 MG/L 20140710065-I Alert Chem NO30 2014-07-29
NO3 CHEM7359 10/11/2016 10/19/2016 12/13/2016 55 EP-A NITRATE 6.53 5 10 MG/L 20161011117-I Alert Chem NO30 2016-10-19
Notice - Source COLI18600 01/04/2019 01/07/2019 01/15/2019 8 SRC-AA COLIFORM (TCR) Present Present Assessment 20190104030 Notice Source 2019-01-07
NO3 CHEM8815 01/06/2020 01/15/2020 01/21/2020 6 EP-A NITRATE 5.51 5 10 MG/L 20200106086-I Alert Chem NO30 2020-01-15
Notice - Source COLI20726 01/04/2021 01/06/2021 SRC-AA COLIFORM (TCR) Present Present Assessment 20210104074 Notice Source 2021-01-06
TCR COLI21879 01/12/2022 01/14/2022 01/19/2022 5 DIST-A COLIFORM (TCR) Present Present Routine 20220112040 Alert TCR0 2022-01-14
TCR COLI21890 01/19/2022 01/20/2022 01/20/2022 0 DIST-A E. COLI Present 0 Repeat 2204093 Alert TCR0 2022-01-20
TCR COLI21890 01/19/2022 01/20/2022 01/20/2022 0 DIST-A COLIFORM (TCR) Present Present Repeat 2204093 Alert TCR0 2022-01-20
TCR COLI21890 01/19/2022 01/20/2022 01/20/2022 0 DIST-A COLIFORM (TCR) Present Present Repeat 2204094 Alert TCR0 2022-01-20
Notice - Source COLI21890 01/19/2022 01/20/2022 01/20/2022 0 SRC-AA COLIFORM (TCR) Present Present Triggered 2204096 Notice Source 2022-01-20
NO3 CHEM9974 10/19/2022 10/26/2022 10/27/2022 1 EP-A NITRATE 6.81 5 10 MG/L 20221019-068-I Alert Chem NO30 2022-10-26
NO3 NO3-67 04/12/2023 04/18/2023 04/20/2023 2 EP-A NITRATE 7.34 5 10 MG/L 20230412-091-I Alert Chem NO30 2023-04-18
NO3 NO3-255 04/10/2024 04/18/2024 04/25/2024 7 EP-A NITRATE 9.36 5 10 MG/L 20240410-070-I Alert Chem NO30 2024-04-18


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