PWS ID: 00587 ---- ONTARIO, CITY OF

Alerts indicate water quality tests with analytical results greater than the detection limit or one-half of the maximum allowable contaminant level which may require some follow-up actions by Drinking Water Services. See the Contacts link for reports on follow-up actions. Alerts are not water quality violations. Violations for this water system can be found here.

Alert Type Abbreviations:  CHEM = Chemical, COLI = Coliform, LCR = Lead and copper 90th percentile, SODIUM = Sodium*
*Non-alert (water quality notice)
Results:  36 alerts found for this water system.Show response time
Water Quality Alerts
Alert ID Sample
Date
Alert
Date
Source
ID
Source Name Alert
Type
Contaminant Result Alert
Level
MCL Contact
Report
CHEM9000 07/01/2020 07/15/2020 DIST-A Distribution System CHEM TOTAL TRIHALOMETHANES (TTHM) 0.08330.08 0.0807/23/2020
CHEM9000 07/01/2020 07/15/2020 DIST-A Distribution System CHEM TOTAL TRIHALOMETHANES (TTHM) 0.08310.08 0.0807/23/2020
CHEM8613 10/02/2019 10/16/2019 DIST-A Distribution System CHEM TOTAL TRIHALOMETHANES (TTHM) 0.08140.08 0.0810/16/2019
CHEM8483 07/16/2019 09/04/2019 EP-A EP FOR RIVER, WELLS SODIUM* SODIUM 44.520
COLI18313 10/09/2018 10/12/2018 DIST-A 993 S Oregon St #5 COLI COLIFORM, TOTAL (TCR) Present Present Present10/12/2018
CHEM8033 07/11/2018 08/16/2018 EP-A EP FOR RIVER, WELLS SODIUM* SODIUM 47.420
CHEM7642 07/06/2017 07/21/2017 DIST-A Distribution System CHEM TOTAL TRIHALOMETHANES (TTHM) 0.08270.08 0.08
CHEM7279 01/09/2014 09/07/2016 SRC-AI WELL 17 SODIUM* SODIUM 46.520
CHEM7220 07/06/2016 07/26/2016 DIST-A Distribution System CHEM TOTAL TRIHALOMETHANES (TTHM) 0.08130.08 0.08
COLI14252 06/17/2015 06/22/2015 DIST-A 389 nw 11th ave COLI COLIFORM, TOTAL (TCR) Present Present Present06/22/2015
COLI11771 07/02/2013 07/03/2013 DIST-A #16 nw 5th & nw 3rd COLI COLIFORM, TOTAL (TCR) Present Present Present07/03/2013
CHEM5462 07/18/2012 08/01/2012 DIST-A Distribution System CHEM TOTAL TRIHALOMETHANES (TTHM) 0.08340.08 0.0808/02/2012
CHEM4859 04/05/2011 05/06/2011 EP-A EP FOR RIVER, WELLS, INFILT CHEM DI(2-ETHYLHEXYL) - PHTHALATE 0.000920.0006 0.00605/11/2011
CHEM4811 03/09/2011 04/01/2011 EP-A EP FOR RIVER, WELLS, INFILT SODIUM* SODIUM 34.120
CHEM4417 09/14/2010 10/13/2010 DIST-A Distribution System CHEM TOTAL TRIHALOMETHANES (TTHM) 0.08250.08 0.0810/15/2010
CHEM4101 04/21/2010 06/01/2010 EP-A EP FOR RIVER, WELLS, INFILT SODIUM* SODIUM 30.720
CHEM3643 08/03/2009 08/21/2009 DIST-A Distribution System CHEM TOTAL TRIHALOMETHANES (TTHM) 0.1060.08 0.0809/02/2009
COLI5508 08/13/2008 08/15/2008 DIST-A Distribution System COLI COLIFORM, TOTAL (TCR) Present Present Present
CHEM1962 02/15/2006 04/11/2006 EP-A EP FOR SNAKE RIVER & WELLFIELD CHEM TOLUENE 0.00080.0005 1
CHEM1800 07/27/2005 12/19/2005 DIST-A Distribution System CHEM TOTAL TRIHALOMETHANES (TTHM) 0.1090.08 0.08
CHEM1800 11/09/2005 12/19/2005 DIST-A Distribution System CHEM TOTAL TRIHALOMETHANES (TTHM) 0.08310.08 0.08
CHEM1714 07/27/2004 08/16/2005 DIST-A Distribution System CHEM TOTAL TRIHALOMETHANES (TTHM) 0.09120.08 0.08
CHEM1634 02/15/2005 06/23/2005 EP-A EP FOR SNAKE RIVER & WELLFIELD CHEM ARSENIC 0.0120.0105 0.01
CHEM1506 02/15/2005 03/28/2005 EP-A EP FOR SNAKE RIVER & WELLFIELD CHEM ARSENIC 0.0120.0105 0.01
CHEM1258 12/19/1996 03/21/2005 LCR LEAD 90TH % VALUE 0.0180.0155
CHEM1163 08/18/2003 03/17/2005 SRC-AC INFILTRATION COLLECTOR - PIT CHEM GROSS ALPHA, EXCLUDING RA & U 8.115 15
CHEM919 08/16/2004 10/19/2004 DIST-A Distribution System CHEM TOTAL TRIHALOMETHANES (TTHM) 0.09130.08 0.08
CHEM791 04/15/2004 06/25/2004 EP-A EP FOR SNAKE RIVER & WELLFIELD SODIUM* SODIUM 3620
CHEM713 08/18/2003 03/24/2004 SRC-AC INFILTRATION COLLECTOR - PIT CHEM ARSENIC 0.0130.0105 0.01
CHEM713 08/18/2003 03/24/2004 SRC-AD INFILTRATION COLLECTOR - POND CHEM ARSENIC 0.0140.0105 0.01
CHEM713 08/18/2003 03/24/2004 SRC-AC INFILTRATION COLLECTOR - PIT SODIUM* SODIUM 60.720
CHEM713 08/18/2003 03/24/2004 SRC-AD INFILTRATION COLLECTOR - POND SODIUM* SODIUM 5620
CHEM329 02/04/2003 03/11/2003 EP-A EP FOR SNAKE RIVER & WELLFIELD SODIUM* SODIUM 37.720
CHEM142 02/05/2002 10/03/2002 EP-A EP FOR SNAKE RIVER & WELLFIELD SODIUM* SODIUM 46.220
CHEM142 05/20/2002 10/03/2002 SRC-AA SNAKE RIVER SODIUM* SODIUM 31.820
CHEM142 05/20/2002 10/03/2002 SRC-AB WELLFIELD (8 WELLS) SODIUM* SODIUM 73.420
*Non-alert (water quality notice)


Archived Alerts (SWS database)
Date Source Chemical Results mg/l MCL mg/l
06/22/1993A--EP FOR SNAKE RIVER & WELLFIELDAntimony Total0.01 0.006
03/15/1993A--EP FOR SNAKE RIVER & WELLFIELDAntimony Total0.008 0.006
09/11/2002Coliform
08/03/1998Coliform
01/23/1995Coliform
12/09/1996A--EP FOR SNAKE RIVER & WELLFIELDGross Alpha, Excl. Radon & U5.1 15
07/18/1994A--EP FOR SNAKE RIVER & WELLFIELDGross Alpha, Excl. Radon & U5.1 15
08/29/1991AB--WELLFIELD (8 WELLS)Gross Alpha, Excl. Radon & U5.8 15
07/24/2001A--EP FOR SNAKE RIVER & WELLFIELDSodium77.4
12/09/1996AB--WELLFIELD (8 WELLS)Sodium60.2
01/19/1996A--EP FOR SNAKE RIVER & WELLFIELDSodium45.7
07/18/1994A--EP FOR SNAKE RIVER & WELLFIELDSodium67.9
03/15/1993A--EP FOR SNAKE RIVER & WELLFIELDSodium53.1



For further information on this public water system, click on the area of interest below:
System Info :: Report for Lenders :: Alerts :: Violations :: Compliance & Enforcement :: Contacts & Advisories :: Site Visits :: Public Notice
Coliform Summary :: Coliform Results :: Sampling Schedule for Coliform :: Groundwater/GWUDI Source Details :: Plan Review
Chemical Group Summary :: Latest Chemical Results :: Entry Point Detects :: Single Analyte Results 
Chemical Schedule Summary :: Chemical Schedule Details
Lead & Copper :: Corrosion Control (LCR) :: Nitrate :: Arsenic :: Radionuclides :: GWR 4-Log :: LT2 :: Cyanotoxins
DBPs :: TOC & Alkalinity :: DBP Sample Sites :: FANLs :: MRDL :: Turbidity :: SWTR :: RAA :: LRAA For SDWIS: 3898