OHA Drinking Water Services
OR41
PWS ID: 00587 ---- ONTARIO, CITY OF
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
Current
Alert Level
Current
MCL
Units Sample Type Lab Sample ID SelectAtype FilterAlertDate
RAD ARCHIVE 08/29/1991 02/25/1992 AB GROSS ALPHA, EXCL. RADON & U 5.8 15 pCi -1959216 Alert Chem RAD0 1992-02-25
IOC ARCHIVE 03/15/1993 11/12/1993 A SODIUM 53.1 20 MG/L 9304874 Alert Chem IOC0 1993-11-12
IOC ARCHIVE 03/15/1993 11/12/1993 A ANTIMONY, TOTAL 0.008 0.006 MG/L 9304874 Alert Chem IOC0 1993-11-12
IOC ARCHIVE 06/22/1993 01/28/1994 A ANTIMONY, TOTAL 0.01 0.006 MG/L 93103059 Alert Chem IOC0 1994-01-28
IOC ARCHIVE 07/18/1994 09/25/1996 A SODIUM 67.9 20 MG/L 9418191 Alert Chem IOC0 1996-09-25
IOC ARCHIVE 07/18/1994 12/23/1996 A SODIUM 67.9 20 MG/L NOT GIVEN Alert Chem IOC0 1996-12-23
IOC ARCHIVE 07/18/1994 08/21/1997 A SODIUM 67.9 20 MG/L 9418191 Alert Chem IOC0 1997-08-21
RAD ARCHIVE 07/18/1994 08/21/1997 A GROSS ALPHA, EXCL. RADON & U 5.1 15 pCi 9418191 Alert Chem RAD0 1997-08-21
TCR ARCHIVE 01/23/1995 02/16/1995 COLIFORM (TCR) Present Present Routine 1518 Alert TCR0 1995-02-16
IOC ARCHIVE 01/19/1996 09/18/1996 A SODIUM 45.7 20 MG/L 9601439 Alert Chem IOC0 1996-09-18
IOC ARCHIVE 12/09/1996 02/12/1997 AB SODIUM 60.2 20 MG/L 1996-98 Alert Chem IOC0 1997-02-12
RAD ARCHIVE 12/09/1996 02/09/1998 A GROSS ALPHA, EXCL. RADON & U 5.1 15 pCi 9628127 Alert Chem RAD0 1998-02-09
LCR CHEM1258 12/19/1996 03/21/2005 DIST-A LEAD SUMMARY 0.018 0.015 MG/L Alert Chem LCR0 2005-03-21
TCR ARCHIVE 08/03/1998 09/03/1998 COLIFORM (TCR) Present Present Routine 60833491 Alert TCR0 1998-09-03
IOC ARCHIVE 07/24/2001 10/07/2002 A SODIUM 77.4 20 MG/L 583301 Alert Chem IOC0 2002-10-07
Notice - Sodium CHEM142 02/05/2002 10/03/2002 EP-A SODIUM 46.2 20 MG/L 688001I Notice Sodium 2002-10-03
Notice - Sodium CHEM142 05/20/2002 10/03/2002 SRC-AA SODIUM 31.8 20 MG/L 746701I Notice Sodium 2002-10-03
Notice - Sodium CHEM142 05/20/2002 10/03/2002 SRC-AB SODIUM 73.4 20 MG/L 746702I Notice Sodium 2002-10-03
TCR ARCHIVE 09/11/2002 10/03/2002 COLIFORM (TCR) Present Present Routine 309315271 Alert TCR0 2002-10-03
Notice - Sodium CHEM329 02/04/2003 03/11/2003 EP-A SODIUM 37.7 20 MG/L 884102I Notice Sodium 2003-03-11
ARS CHEM713 08/18/2003 03/24/2004 SRC-AC ARSENIC 0.013 0.01 MG/L 30819-8I Alert Chem CMCL ARS0 2004-03-24
Notice - Sodium CHEM713 08/18/2003 03/24/2004 SRC-AC SODIUM 60.7 20 MG/L 30819-8I Notice Sodium 2004-03-24
ARS CHEM713 08/18/2003 03/24/2004 SRC-AD ARSENIC 0.014 0.01 MG/L 30819-9I Alert Chem CMCL ARS0 2004-03-24
Notice - Sodium CHEM713 08/18/2003 03/24/2004 SRC-AD SODIUM 56 20 MG/L 30819-9I Notice Sodium 2004-03-24
RAD CHEM1163 08/18/2003 03/17/2005 SRC-AC GROSS ALPHA, EXCL. RADON & U 8.1 15 PCI/L 30819-8R Alert Chem RAD0 2005-03-17
Notice - Sodium CHEM791 04/15/2004 06/25/2004 EP-A SODIUM 36 20 MG/L 04D0446-01I Notice Sodium 2004-06-25
DBP CHEM1714 07/27/2004 08/16/2005 DIST-A TTHM 0.0912 0.08 MG/L 04D1144-02 Alert Chem CMCL DBP0 2005-08-16
DBP CHEM919 08/16/2004 10/19/2004 DIST-A TTHM 0.0913 0.08 MG/L 04D1363-01 Alert Chem CMCL DBP0 2004-10-19
ARS CHEM1506 02/15/2005 03/28/2005 SRC-AC ARSENIC 0.012 0.01 MG/L 05D0197-05 Alert Chem CMCL ARS0 2005-03-28
DBP CHEM1800 07/27/2005 12/19/2005 DIST-A TTHM 0.109 0.08 MG/L 05D1234-04 Alert Chem CMCL DBP0 2005-12-19
DBP CHEM1800 11/09/2005 12/19/2005 DIST-A TTHM 0.0831 0.08 MG/L 05D2082-03 Alert Chem CMCL DBP0 2005-12-19
VOC CHEM1962 02/15/2006 04/11/2006 EP-A TOLUENE 0.0008 1 MG/L 06D0234-01V Alert Chem VOC0 2006-04-11
TCR COLI5508 08/13/2008 08/15/2008 DIST-A COLIFORM (TCR) Present Present Routine 308782991 Alert TCR0 2008-08-15
DBP CHEM3643 08/03/2009 08/21/2009 09/02/2009 12 DIST-A TTHM 0.106 0.08 MG/L 090805028004 Alert Chem CMCL DBP0 2009-08-21
Notice - Sodium CHEM4101 04/21/2010 06/01/2010 EP-A SODIUM 30.7 20 MG/L 100422023001-I Notice Sodium 2010-06-01
DBP CHEM4417 09/14/2010 10/13/2010 10/15/2010 2 DIST-A TTHM 0.0825 0.08 MG/L 100916018002-D Alert Chem CMCL DBP0 2010-10-13
Notice - Sodium CHEM4811 03/09/2011 04/01/2011 EP-A SODIUM 34.1 20 MG/L 110310041001-I Notice Sodium 2011-04-01
SOC CHEM4859 04/05/2011 05/06/2011 05/11/2011 5 EP-A DI(2-ETHYLHEXYL) PHTHALATE 0.00092 0.006 MG/L 110406022001-S Alert Chem SOC0 2011-05-06
DBP CHEM5462 07/18/2012 08/01/2012 08/02/2012 1 DIST-A TTHM 0.0834 0.08 MG/L 120719018002-D Alert Chem CMCL DBP0 2012-08-01
TCR COLI11771 07/02/2013 07/03/2013 07/03/2013 0 DIST-A COLIFORM (TCR) Present Present Routine 3011173161 Alert TCR0 2013-07-03
Notice - Sodium CHEM7279 01/09/2014 09/07/2016 SRC-AI SODIUM 46.5 20 MG/L 140110031002-I Notice Sodium 2016-09-07
TCR COLI14252 06/17/2015 06/22/2015 06/22/2015 0 DIST-A COLIFORM (TCR) Present Present Routine 1506821002 Alert TCR0 2015-06-22
DBP CHEM7220 07/06/2016 07/26/2016 DIST-A TTHM 0.0813 0.08 MG/L 1607226004A-D Alert Chem CMCL DBP0 2016-07-26
DBP CHEM7642 07/06/2017 07/21/2017 DIST-A TTHM 0.0827 0.08 MG/L 1707197004-D Alert Chem CMCL DBP0 2017-07-21
Notice - Sodium CHEM8033 07/11/2018 08/16/2018 EP-A SODIUM 47.4 20 MG/L 1807589001-I Notice Sodium 2018-08-16
TCR COLI18313 10/09/2018 10/12/2018 10/12/2018 0 DIST-A COLIFORM (TCR) Present Present Routine 1810437002 Alert TCR0 2018-10-12
Notice - Sodium CHEM8483 07/16/2019 09/04/2019 EP-A SODIUM 44.5 20 MG/L 1907762001-I Notice Sodium 2019-09-04
DBP CHEM8613 10/02/2019 10/16/2019 10/16/2019 0 DIST-A TTHM 0.0814 0.08 MG/L 1910027004A-D Alert Chem CMCL DBP0 2019-10-16
DBP CHEM9000 07/01/2020 07/15/2020 07/23/2020 8 DIST-A TTHM 0.0833 0.08 MG/L 200712401A-D Alert Chem CMCL DBP0 2020-07-15
DBP CHEM9000 07/01/2020 07/15/2020 07/23/2020 8 DIST-A TTHM 0.0831 0.08 MG/L 200712404A-D Alert Chem CMCL DBP0 2020-07-15
DBP CHEM9389 07/06/2021 07/21/2021 08/16/2021 26 DIST-A TTHM 0.0975 0.08 MG/L 2107360001A-D Alert Chem CMCL DBP0 2021-07-21
DBP CHEM9389 07/06/2021 07/21/2021 08/16/2021 26 DIST-A TTHM 0.104 0.08 MG/L 2107360004A-D Alert Chem CMCL DBP0 2021-07-21
DBP CHEM9817 07/05/2022 07/14/2022 07/15/2022 1 DIST-A TTHM 0.0965 0.08 MG/L 2207098001A-D Alert Chem CMCL DBP0 2022-07-14
DBP CHEM9817 07/05/2022 07/14/2022 07/15/2022 1 DIST-A TTHM 0.0918 0.08 MG/L 2207098004A-D Alert Chem CMCL DBP0 2022-07-14
DBP DBP-17 07/05/2023 07/17/2023 07/19/2023 2 DIST-A TTHM 0.0895 0.08 MG/L 23070332-04A-D Alert Chem CMCL DBP0 2023-07-17
DBP DBP-83 07/01/2024 07/16/2024 07/16/2024 0 DIST-A TTHM 0.0854 0.08 MG/L 24070334-01A-D Alert Chem CMCL DBP0 2024-07-16
DBP DBP-84 07/01/2024 07/16/2024 07/16/2024 0 DIST-A TTHM 0.0839 0.08 MG/L 24070334-04A-D Alert Chem CMCL DBP0 2024-07-16



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