Sewer Overflow Log

CSO Bypass Log

Sewer Overflow Log 

Sewer overflows impact the environment and is a serious problem that
Utilities Kingston is working hard to improve.

For overflow status, see our real-time overflow map.

Learn more about sewer overflows and our sewer overflow reduction efforts. Want to know more? Get answers to frequently asked health and technical questions

Definitions:

  • A sewage or sewer overflow is defined as a discharge of diluted raw sewage from the wastewater collection system.  These can happen at locations in the underground pipe network (the collection system) as well at at pumping and storage facilities.  The tables below differentiate between the two types. 
  • A sewer bypass is defined as a discharge of partially treated sewage from a wastewater treatment plant.  Typically, this is caused by a bypass or short circuiting of the secondary treatment process and results in a discharge of blended primary and secondary treated sewage.

Tables 1 and 2 below show the sewage overflow history since the year 2000 for pumping and overflow storage facilities in the City of Kingston.

Tables 3 and 4 show the sewage overflow history since September 2006 for the City's wastewater pipe network. These are sometimes referred to as “CSO” or combined sewer overflows.

Tables 5 and 6 show the bypass history for wastewater treatment plants (WWTP). Bypasses at WWTP can occur at different stages in the process and often result in partial treatment of wastewater rather than the discharge of raw or rain-diluted sewage.

For more detailed information, please contact Utilities Kingston from Monday to Friday,
8 AM to 5 PM, by calling 613-546-0000. 

Table 1 provides information on the most recent sewage overflow events for facilities, including the volume of each overflow and the precipitation that had fallen at the time of each event. The table is manually updated once a sewer overflow event has ended. Events that are still overflowing will not yet be included.

Most Recent Facility Sewage Overflow Events
Last Updated: 22/02/2018 10:09:51 AM
Date Cause Volume (m3) Precipitation (mm)
February 20, 2018 - February 22, 2018 Rain on Snowmelt 46,627.7 26.1
January 11, 2018 - January 13, 2018 Rain on Rapid Snowmelt 56,859.2 38.1
October 30, 2017 - October 31, 2017 Heavy Rain 47,184.1 82.4
October 09, 2017 Heavy Rain 11,250.4 66.2
August 18, 2017 Heavy Downpour 1101.0 18.1
July 24, 2017 - July 25, 2017 Heavy Rain 51,942.2 106.0
June 23, 2017 Heavy Rain 6,494.6 51.8
May 04, 2017 - May 08, 2017 Heavy Prolonged Rain 79,891.7 103.0
May 01, 2017 - May 02, 2017 Heavy Rain 12,212.4(1) 58.0
April 06, 2017 - April 08, 2017 Heavy Rain 45,968.5(1) 51.6
April 04, 2017 - April 05, 2017 Heavy Rain 14,858.1(1) 42.5
January 12, 2017 Rain on Snowmelt 2394.3 20.8
October 21, 2016 Heavy Rain 14,709.2 64.9
October 03, 2016 Heavy Rain 702.4 12.5
March 10, 2016 - March 11, 2016 Rain 17,009.6 10.9
February 24, 2016 - February 25, 2016 Heavy Rain on Snowmelt 27,975.3 42.5
January 10, 2016 - January 11, 2016 Rain on snowmelt 39,188.4 37.1
October 28, 2015 Heavy Rain 2,446.7 36.8
August 20, 2015 Heavy Rain 5,433 37.9
June 23, 2015 Heavy Rain 38,963 73.8
August 24, 2014 Equipment Failure ~50-70 0.0
August 12, 2014 - August 13, 2014 Heavy Rain 9416 72
July 15, 2014 Heavy Rain 13,945.1+ 38.8
July 08, 2014 Heavy Rain 9,740 25.7
June 13, 2014 Heavy Rain 41,626 21.6
June 11, 2014 Heavy Rain Unknown 32.7
May 01, 2014 Rain 4,542 19.3
April 15, 2014 Rain 4,367 12.6
April 07, 2014 - April 09, 2014 Rain on Snowmelt 71,966 28.5
April 04, 2014 - April 05, 2014 Rain on Snowmelt 26,269 19.1
February 21, 2014 Heavy Rain on Snowmelt 9,724 28.8
January 11, 2014 Heavy Rain on Snowmelt 9,955+ 20.1
January 06, 2014 Rain on Snowmelt 5,732 14.9
June 16, 2013 Power Outage 188 0.0
June 11, 2013 - June 12, 2013 Heavy Rain 52,064 54.3
June 01, 2013 Power Outage 3245 0.0
June 01, 2013 - June 02, 2013 Heavy Rain 19,508+ 29.1
May 21, 2013 Power Outage 5,000 0.0
May 11, 2013 Power Outage 12675 0.0
April 12, 2013 Freezing Rain 465 14.3
March 12, 2013 Rain on Snowmelt 7,922 14.0
January 13, 2013 Rain on Snowmelt 267 8.6
December 21, 2012 Heavy rain 678 36.1
September 18, 2012 Heavy Rain 3,415 38.8
September 04, 2012 Heavy Rain 8,068 75.2
June 12, 2012 Heavy Rain 119+ 31
January 13, 2012 Power Outage Unknown 24.2
October 15, 2011 Heavy Rain Unknown 35.5
August 21, 2011 Heavy Rain Unknown 28.7
July 29, 2011 Heavy Rain 5,657 94.3
May 28, 2011 Rain Unknown 20.3
May 14, 2011 - May 16, 2011 Heavy rain Unknown 77.2
April 20, 2011 - April 20, 2011 Heavy rain 20.5 23.5
April 16, 2011 - April 17, 2011 Heavy rain 712 31.6
March 10, 2011 - March 11, 2011 Heavy rain + Snow Melt 2,254 31.6
March 05, 2011 - March 06, 2011 Heavy rain + Snow Melt 17,289 51.2
November 17, 2010 Heavy Rain 4,957 46.2
July 17, 2010 Power Outage 372 11.1
June 28, 2010 Rain 1,047 20.9
June 22, 2010 Heavy rain 4,331 26.5
January 25, 2010 Heavy rain + Snow Melt 29,526 36.0
December 03, 2009 Rain 5,143 33.0
August 11, 2009 Heavy rain 954 37.0

(1) Volume corrections were made to account for sensor malfunction identified at the Collingwood CSO tank.

Table 2 provides a breakdown of the yearly totals of diluted raw sewage. The information from Table 1 is included in the Table 2 data.

Historical Facility Sewage Overflow Totals
Last Updated: 22/02/2018 10:18:12 AM
Year Events Volume (m3) Precipitation (mm)
2018 2 103,486.9 64.2
2017 10 273,297.3 (4) 600.3
2016 5 99,584.9 167.9
2015 3 46,843+ 148.5
2014 13 207,323 334.1
2013 8 106,334+ 120.3
2012 5 12,280+ 205.3
2011 9 25,933+ 394.6
2010 5 40,233 140.7
2009 5 14,138 112.0
2008 6 16,488(2) 56.0(3)
2007 5 3,568 98.0
2006 11(1) 140,616 306.6
2005 9(1) 124,761 348.8
2004 20(1) 383,208 411.7
2003 30(1) 725,637 375.1
2002 5 61,371 117.4
2001 6 82,469 115.0
2000 13 81,802 268.8
13 107937.4 514.0

(1) Totals include multiple events on the same day. Total percipitation refers to rainfall accumulated during all bypass events. (2) For some events volumes were unknown (3) 2008 rainfall data unavailable until after mid-June; therefore, total is N/A (4) Volume corrections were made to account for sensor malfunction identified at the Collingwood CSO tank; Corrections impacted volumes between early April and early May 2017.

Table 3 contains the most recent sewage overflow information for the collection system. Information in Table 3 is included in Table 4 data.

Most Recent Collection System Sewage Overflows
Last Updated: 22/02/2018 10:12:59 AM
Date Cause Volume (m3) Precipitation (mm)
February 20, 2018 - February 21, 2018 Rain on Snowmelt 7142.2 26.1
January 11, 2018 - January 13, 2018 Rain on Rapid Snowmelt 34,517.4 38.1
October 30, 2017 - October 31, 2017 Heavy Rain 54,552 82.4
October 24, 2017 Heavy Rain 184.9 35.8
October 09, 2017 Heavy Rain 8,716.8 66.2
September 07, 2017 Heavy Downpour 23.3 7.5
September 06, 2017 Heavy Downpour 0.3 18.9
September 04, 2017 Rain 9.2 14.8
August 22, 2017 Heavy Downpour 132.4 21.6
August 18, 2017 Heavy Rain 1127.2 18.1
August 15, 2017 Heavy Downpour 958.3 12.3
August 12, 2017 Rain 228.3 6.9
July 24, 2017 - July 25, 2017 Heavy Rain 25,208.2 106.0
July 08, 2017 Rain 263.7 9.1
June 23, 2017 Heavy Rain 109.0 51.8
June 16, 2017 Heavy Rain 51.6 17.8
May 25, 2017 Rain 12.1 16.2
May 04, 2017 - May 07, 2017 Heavy Prolonged Rain 65,452.7 103.0
May 01, 2017 - May 02, 2017 Heavy Rain 916.1 58.0
April 06, 2017 - April 07, 2017 Heavy Rain 13,121.7 51.6
April 04, 2017 Heavy Rain 188 42.5
January 12, 2017 Rain on Snowmelt 300.6 20.8
October 21, 2016 - October 25, 2016 Heavy Rain + Blockage 87,579.8 64.9
October 17, 2016 Heavy Rain 1,107.4 23.1
October 03, 2016 Heavy Rain 8212.1 12.5
September 10, 2016 Heavy Rain 1087.1 11.6
August 21, 2016 Heavy Rain 1,578.4 26.0
August 16, 2016 Rain 44.4 21.1
August 13, 2016 Heavy Rain 954.0 19.2
June 20, 2016 Heavy Rain 2,276.1 25.0
June 11, 2016 Heavy Rain 2,125.4 20.8
June 02, 2016 Rain 35.4 6.0
March 31, 2016 - April 01, 2016 Rain 21.8 36.9
February 24, 2016 Heavy Rain on Snowmelt 1,525.8 42.5
February 03, 2016 Rain on Snowmelt 332.6 24.3
January 10, 2016 - January 11, 2016 Rain on snowmelt 13,346.6 37.1
October 28, 2015 Heavy Rain 422.2 36.8
October 25, 2015 Rain 39.7 11.0
October 25, 2015 Rain 39.7 11.0
October 13, 2015 Rain 2.5 14.3
October 09, 2015 Rain 16.1 15.1
September 19, 2015 Rain 18.5 8.7
September 12, 2015 - September 13, 2015 Rain 305.4 44.3
August 30, 2015 - September 08, 2015 Blockage 391.8 0.0
August 20, 2015 Heavy Rain 4,132 37.9
August 11, 2015 Heavy Rain 64.2 15.0
August 03, 2015 Rain 21.0 1.7
July 30, 2015 Rain 92.0 6.8
July 25, 2015 Rain 72.9 8.2
July 17, 2015 Rain 164.7 14.8
July 07, 2015 - July 08, 2015 Rain 36.7 10.9
June 28, 2015 Rain 52.9 23.2
June 23, 2015 Heavy Rain 20,571 73.8
June 21, 2015 Rain 110.9 9.5
June 12, 2015 Rain 820.1 35.2
June 08, 2015 Rain 28.1 22.3
June 05, 2015 Rain 16.8 5.6
March 10, 2015 Melt 20.9 0
March 08, 2015 Rain on melt 68.9 0.4
March 03, 2015 Rain on melt 24.4 3.6
October 16, 2014 Rain 5.9 13.5
September 21, 2014 Rain 28.0 10.5
September 06, 2014 Rain 5.0 4.0
September 02, 2014 Rain 117.1 3.7
August 30, 2014 Rain 31.6 4.9
August 28, 2014 Plugged Pipe Unknown 0.0
August 27, 2014 Unknown 128.8 0.0
August 22, 2014 Heavy Rain 1,329.7 18.6
August 16, 2014 Rain 75.4 8.9
August 12, 2014 Heavy Rain 902.1 72
July 27, 2014 Heavy Rain 462.1 13.1
July 15, 2014 Heavy Rain 10,341.0 38.8
July 09, 2014 Rain 15.8 0.1
July 08, 2014 Heavy Rain 8099.1 25.7
July 07, 2014 Rain 6.1 9.6
June 24, 2014 Heavy Rain 2,002 17.9
June 24, 2014 - June 26, 2014 Blockage 3,148.4 0.0
June 18, 2014 Heavy Rain 262 12.8
June 13, 2014 - June 24, 2015 Blockage 12,993.2 0.0
June 13, 2014 Heavy Rain 1,622 21.6
June 11, 2014 Heavy Rain 10,997 32.7
April 29, 2014 - May 05, 2014 Rain 386 19.3
April 07, 2014 - April 09, 2014 Rain on Snowmelt 7,071 28.5
April 04, 2014 - April 05, 2014 Rain on Snowmelt 1,551 19.1
February 21, 2014 Heavy Rain on Snowmelt 30,983 28.8
January 11, 2014 Heavy Rain on Snowmelt 11,040 20.1
January 06, 2014 Rain on Snowmelt 11,901 14.9
December 28, 2013 - December 30, 2013 Snowmelt 639 4.2
October 16, 2013 Rain 132 8.2
October 07, 2013 Heavy Rain 421 20.1
October 06, 2013 Rain 83 6.0
September 21, 2013 Heavy Rain 422 38.6
September 10, 2013 Rain 1,860 13.8
August 26, 2013 Rain 1,709 13.2
August 03, 2013 Rain 2 19.1
July 17, 2013 Heavy Rain 2,651.3 N/A
June 16, 2013 Rain 755 15.5
June 11, 2013 - June 12, 2013 Heavy Rain 64,567 54.3
June 01, 2013 - June 02, 2013 Heavy Rain 38121 29.1
May 21, 2013 Rain 16 9.7
May 10, 2013 Rain 628 11.4
April 12, 2013 Freezing Rain 1,249 14.3
March 12, 2013 Rain on Snowmelt 23,665 14.0
January 13, 2013 Rain on Snowmelt 6,646 8.6
December 21, 2012 Heavy Rain 10,335 36.1
September 18, 2012 Heavy Rain 13,133 38.8
September 14, 2012 Heavy Rain 3,426 17.3
September 04, 2012 Heavy Rain 76,213 75.2
August 12, 2012 Rain 852.1 16.1
August 10, 2012 Rain 256.5 17.0
June 24, 2012 Rain 644.4 6.9
June 19, 2012 Rain 89.2 9.7
June 12, 2012 Heavy Rain 12,810 31
June 04, 2012 Rain 367 4.5
June 01, 2012 Rain 2,660 23.4
December 21, 2011 Rain 257.0 20.7
October 15, 2011 Heavy Rain 984 35.5
August 21, 2011 Heavy Rain 3,813 28.7
July 29, 2011 Heavy Rain 174,503 94.3
June 13, 2011 Rain 54 N/A
May 28, 2011 Rain 3,947 20.3
May 23, 2011 Rain 11,841 11.5
May 14, 2011 - May 16, 2011 Heavy Rain 3,978 77.2
April 26, 2011 - April 27, 2011 Rain 297.0 18.8
April 25, 2011 Rain 29.9 7.9
April 21, 2011 - May 02, 2011 Rain 870.7 36.3
April 20, 2011 - April 21, 2011 Heavy rain 160.0 23.5
April 16, 2011 - April 17, 2011 Heavy rain 16,560 31.6
March 10, 2011 - March 11, 2011 Heavy Rain + Snow Melt 73,991 31.6
March 05, 2011 - March 06, 2011 Heavy Rain + Snow Melt 238,157 51.2
February 28, 2011 Rain on Snowmelt 5,694 19.6
December 12, 2010 Prolonged Rain 15,942 30.5
December 01, 2010 Prolonged Rain 8,456 27.4
November 23, 2010 Rain 52 10.1
November 17, 2010 Heavy Rain 50,457 46.2
October 01, 2010 Rain 1,089 32.6
September 22, 2010 Rain 13 9.5
September 16, 2010 Rain 82 7.6
September 13, 2010 Rain 82 7.4
September 07, 2010 Rain 31 17.3
August 10, 2010 Heavy Rain 2,958 11.7
August 05, 2010 Heavy Rain 239 9.4
July 28, 2010 Heavy Rain 5,273 18.9
July 21, 2010 Heavy Rain 228 8.2
July 19, 2010 Heavy Rain 17 12.0
July 17, 2010 Heavy Rain 1,225 11.1
June 28, 2010 Rain 5,532 20.9
June 24, 2010 Rain 202.0 14.6
June 22, 2010 Heavy rain 1,772 26.5
May 13, 2010 Rain 45 7.9
May 11, 2010 Unknown 7 0
May 05, 2010 Rain 45.0 45.0
May 03, 2010 Rain 2.0 3.3
April 27, 2010 Rain 346 3.7
March 14, 2010 Heavy Rain 12 11.2
January 25, 2010 - January 26, 2010 Heavy Rain + Snow Melt 118,747 36.0
December 03, 2009 Rain 41,182 33.0
November 19, 2009 - November 20, 2009 Rain 75 23.0
October 31, 2009 Rain 48 18.0
October 23, 2009 - October 28, 2009 Rain/Blockage 512 12.0
October 04, 2009 Rain 251 18.0
September 28, 2009 - September 29, 2009 Rain 195 32.0
August 29, 2009 Heavy rain 1,754 24.0
August 21, 2009 Heavy rain 5,963 30.0
August 11, 2009 Heavy rain 19,481 37.0
August 10, 2009 Heavy rain 3,680 15.0
August 04, 2009 Heavy rain 110 6.0
August 02, 2009 Rain 144 19.0
July 25, 2009 Rain 186 10.0
July 18, 2009 Rain 395 12.0
July 06, 2009 Rain 377 9.0
May 27, 2009 - May 28, 2009 Rain 693 42.0
May 16, 2009 Rain 229 9.0
May 14, 2009 Rain 572 6.0
May 09, 2009 Rain 580 5.0
April 03, 2009 - April 09, 2009 Heavy rain 167,602 33.0
March 29, 2009 - March 31, 2009 Rain 180 12.0
March 11, 2009 Rain / Snowmelt 17,531 7.0
March 07, 2009 Rain / Snowmelt 78 7.0
February 27, 2009 - February 28, 2009 Rain / Snowmelt 17,268 11.0
February 11, 2009 - February 13, 2009 Heavy rain / Snowmelt 35,194 17.0
February 07, 2009 Rain / Snowmelt 78 7.0

Table 4 shows yearly bypass totals for the City's combined sewer system.

Collection System Sewage Overflows Historical Totals (Since Sept. 1, 2006)
Last Updated: 22/02/2018 10:18:45 AM
Year Events Volume (m3) Precipitation (mm)
2018 2 41,659.6 64.2
2017 20 171,556.3 761.2
2016 14 120,226.9 371.1
2015 24 27,502 422.2
2014 26 106,731+ 439.1
2013 17 132,573 280.1+
2012 12 120,786 276.0
2011 16 518,411 512.3
2010 26 209,643 399.0
2009 24 314,278 447.0
2008 41 626,588 N/A(2)
2007 31 85,431 350.0
2006 13 139,381(1) 340.3

(1) For some events in September and October 2006, volumes were unknown. (2) 2008 rainfall data unavailable until after mid-June; therefore, total is N/A

Table 5 contains the most recent partially treated sewage bypass information at Utilities Kingston wastewater treatment plants.

Most Recent Wastewater Treatment Plant Bypasses
Last Updated: 22/02/2018 10:16:20 AM
Date Facility Cause Detail Volume (m3) Precipitation (mm)
February 20, 2018 - February 21, 2018 Cana WWTP Rain on Snowmelt Blended Secondary and Tertiary Treatment 112.7 26.1
February 20, 2018 Cataraqui Bay WWTP Rain on Snowmelt Blended Primary & Secondary Treatment 5,600.0 26.1
January 12, 2018 - January 13, 2018 Cana WWTP Rain on Rapid Snowmelt Blended Secondary and Tertiary Treatment 135.0 38.1
January 12, 2018 - January 13, 2018 Cataraqui Bay WWTP Rain on Rapid Snowmelt Blended Primary & Secondary Treatment 21,200.0 38.1
November 05, 2017 - November 06, 2017 Cana WWTP Rain Blended Secondary and Tertiary Treatment 95.8 35.3
October 30, 2017 - October 31, 2017 Cana WWTP Heavy Rain Blended Secondary and Tertiary Treatment 92.0 82.4
October 30, 2017 - October 31, 2017 Cataraqui Bay WWTP Heavy Rain Blended Primary & Secondary Treatment 31,469 82.4
July 24, 2017 - July 25, 2017 Cana WWTP Heavy Rain Blended Secondary and Tertiary Treatment 235.0 106.0
July 24, 2017 - July 25, 2017 Cataraqui Bay WWTP Heavy Rain Blended Primary & Secondary Treatment 26,579.0 106.0
May 04, 2017 - May 07, 2017 Cataraqui Bay WWTP Heavy Prolonged Rain Blended Primary and Secondary Treatment 55,866.0 103.0
May 01, 2017 - May 02, 2017 Cataraqui Bay WWTP Heavy Rain Blended Primary and Secondary Treatment 1,965.0 58.0
April 06, 2017 - April 07, 2017 Cataraqui Bay WWTP Heavy Rain Blended Primary and Secondary Treatment 36,822.0 51.6
April 04, 2017 - April 05, 2017 Cataraqui Bay WWTP Heavy Rain Blended Primary & Secondary Treatment 18,000 42.5
April 01, 2017 Cana WWTP To be determined. Blended Primary & Secondary Treatment 1.94
February 21, 2017 Cana WWTP High Flows Blended Primary & Secondary Treatment 14.52
October 19, 2016 Cataraqui Bay Planned Power Outage No aeration, otherwise treated 4,229 N/A
January 11, 2016 Cataraqui Bay Weather - Rain on Snowmelt Blended Primary & Secondary Treatment 10,262 37.1

Table 6 shows yearly bypass totals for the City's wastewater treatment plants.

Historical WWTP Bypass Totals (Since Jan. 1, 2016)
Last Updated: 22/02/2018 10:19:59 AM
Year Facility Events Volume (m3)
2018 Cataraqui Bay WWTP 2 26,800
2018 Cana WWTP 2 247.7
2018 Ravensview WWTP 0 0
2017 Ravensview 0 0
2017 Cana 5 441.2
2017 Cataraqui Bay 6 170,701.0
2016 Cana 0 0
2016 Ravensview 0 0
2016 Cataraqui Bay 2 14,491