Owners and operators: intermittent discharging wastewater systems

This document is intended to provide guidance only by reviewing some of the provisions of the Wastewater Systems Effluent Regulations (WSER). This document is not a substitute for reading the WSER and does not in any way supersede or modify the Fisheries Act or the WSER. In the event of an inconsistency between this document and the Act and/or the WSER, the Act and the WSER prevail. Individuals with specific legal problems are urged to seek advice from legal counsel.

1. The requirements set out in the following two tables apply to owners and operators of intermittently discharging wastewater systems that are subject to the WSER.

January 1, 2013 - May 15, 2013

Identification Report

Information required
  • contact details of the owner, operator, contact person and address of the wastewater system
  • statement indicating that wastewater system is intermittent and type of wastewater treatment (e.g. facultative lagoon)
  • statement indicating which entity owns or operates the wastewater system
  • number of overflow points for each combined and sanitary sewer
  • information on the receiving environment at the points of entry for the final discharge point and, if any, for each overflow point of combined and sanitary sewers
  • latitude and longitude of:
    • the final discharge point,
    • the overflow points for each combined and sanitary sewer
    • the point of entry for the final discharge point
  • average daily volume of effluent deposited from the final discharge point in the previous calendar year
Identification report due May 15, 2013 or within 45 days after the wastewater system comes into operation
Change of information within 45 days after the change

January 1, 2013 - December 31, 2014

Volume Deposited
Annual Average Daily Volume (m3)[i] 100 to 17,500 > 17,500
Daily volume determination continuous measure of influent or effluent volume or measure rate of influent or effluent flow or estimate based on generally accepted engineering practices continuous measure of influent or effluent volume or measure rate of influent or effluent flow or estimate based on generally accepted engineering practices
Composition of Effluent
Annual Average Daily Volume (m3)[i] 100 to 17,500 > 17,500
Type of sample composite or grab composite or grab
Sampling frequency
  • if discharge period > 30 days: every 2 weeks but at least 7 days after any other sample
  • if discharge period ≤ 30 days: once per period
  • if discharge period > 30 days: every 2 weeks but at least 7 days after any other sample
  • if discharge period ≤ 30 days: once per period
Averaging period for CBOD and SS annual month
CBOD test method 5-day BOD test with nitrification inhibition conducted by a laboratory accredited to do the test 5-day BOD test with nitrification inhibition conducted by a laboratory accredited to do the test
SS exception (> 25 mg/L, Jul. - Oct.)[ii] yes yes
SS test method total suspended solids test conducted by a laboratory accredited to do the test total suspended solids test conducted by a laboratory accredited to do the test
Averaging period for un-ionized ammonia maximum concentration in the year maximum concentration in the month
Total ammonia test method[iii] total ammonia test conducted by a laboratory accredited to do the test total ammonia test conducted by a laboratory accredited to do the test
pH test method pH test conducted by a laboratory accredited to do the test pH test conducted by a laboratory accredited to do the test
Reporting Requirements
Annual Average Daily Volume (m3)[i] 100 to 17,500 > 17,500
Reporting frequency annually quarterly
Report due within 45 days after the end of the calendar year within 45 days after the end of the quarter
First report due February 14, 2014 May 15, 2013
Information required

a statement that indicates that effluent was not deposited during the year or a statement that indicates that effluent was not deposited during any month in the year; and, for the year:

  • number of days effluent was deposited
  • volume (m3) of effluent deposited
  • average CBOD
  • average SS concentration
  • maximum concentration of NH3, until June 30, 2014

a statement that indicates that effluent was not deposited during the quarter or a statement that indicates that effluent was not deposited during any month in the quarter; and, for each month during which effluent was deposited in the quarter:

  • number of days effluent was deposited
  • volume (m3) of effluent deposited
  • average CBOD
  • average SS concentration
  • maximum concentration of NH3, until June 30, 2014

2. Owners and operators of wastewater systems are responsible for determining which of the following additional tables apply to them.

A. Applications for Authorizations

Transitional Authorization

Application due June 30, 2014

Temporary Authorization to Deposit Un-ionized Ammonia (NH3)

May be made starting January 1, 2013
Initial application period within 30 days after the determination that the acute lethality of the effluent is primarily because of the concentration of NH3
Application period for extension at least 90 days before expiry of authorization

Temporary Bypass Authorization

May be made starting January 1, 2015
Application period

at least 45 days before bypass to address:

  • construction work to make changes to the system
  • maintenance of the system
  • response to an anticipated event beyond control of system owner/operator

B. Effluent Quality Standards - January 1, 2015 Unless Issued a Transitional or Temporary Authorization

Volume Deposited
Annual Average Daily Volume (m3)[i] 100 to ≤ 2,500 > 2,500 to ≤ 17,500 > 17,500 to ≤ 50,000 > 50,000
Daily volume determination continuous measure of influent or effluent volume or measure rate of influent or effluent flow or estimate based on generally accepted engineering practices continuous measure of influent or effluent volume or measure rate of influent or effluent flow or estimate based on generally accepted engineering practices continuous measure of influent or effluent volume or measure rate of influent or effluent flow or estimate based on generally accepted engineering practices continuous measure of influent or effluent volume or measure rate of influent or effluent flow or estimate based on generally accepted engineering practices
Effluent Quality Standards - Carbonaceous Biochemical Oxygen Demand (CBOD), Suspended Solids (SS)
Annual Average Daily Volume (m3)[i] 100 to ≤ 2,500 > 2,500 to ≤ 17,500 > 17,500 to ≤ 50,000 > 50,000
CBOD (mg/L) annual average ≤ 25 annual average ≤ 25 monthly average ≤ 25 monthly average ≤ 25
SS (mg/L) annual average ≤ 25 annual average ≤ 25 monthly average ≤ 25 monthly average ≤ 25
Type of sample composite or grab composite or grab composite or grab composite or grab
Sampling frequency
  • if discharge period > 30 days: every 2 weeks but at least 7 days after any other sample
  • if discharge period ≤ 30 days: once per period
  • if discharge period > 30 days: every 2 weeks but at least 7 days after any other sample
  • if discharge period ≤ 30 days: once per period
  • if discharge period > 30 days: every 2 weeks but at least 7 days after any other sample
  • if discharge period ≤ 30 days: once per period
  • if discharge period > 30 days: every 2 weeks but at least 7 days after any other sample
  • if discharge period ≤ 30 days: once per period
CBOD test method 5-day BOD test with nitrification inhibition conducted in a lab accredited to do the test 5-day BOD test with nitrification inhibition conducted in a lab accredited to do the test 5-day BOD test with nitrification inhibition conducted in a lab accredited to do the test 5-day BOD test with nitrification inhibition conducted in a lab accredited to do the test
SS exception (> 25 mg/L, Jul. - Oct.)[ii] yes yes yes yes
SS test method total suspended solids test conducted in laboratory accredited to do the test total suspended solids test conducted in laboratory accredited to do the test total suspended solids test conducted in laboratory accredited to do the test total suspended solids test conducted in laboratory accredited to do the test
Effluent Quality Standard - Total Residual Chlorine (TRC) [iv]
Annual Average Daily Volume (m3)[i] 100 to ≤ 2,500 > 2,500 to ≤ 17,500 > 17,500 to ≤ 50,000 > 50,000
TRC (mg/L) annual average ≤ 0.02 annual average ≤ 0.02 monthly average ≤ 0.02 monthly average ≤ 0.02
Effluent Quality Standard - Un-ionized Ammonia (NH 3)
Annual Average Daily Volume (m3)[i] 100 to ≤ 2,500 > 2,500 to ≤ 17,500 > 17,500 to ≤ 50,000 > 50,000
NH3 (mg/L, expressed as nitrogen (N) at 15°C ± 1°C) maximum concentration in the year < 1.25 maximum concentration in the year < 1.25 maximum concentration in the month < 1.25 maximum concentration in the month < 1.25
Sampling frequency not specified not specified not specified not specified
Total ammonia test method total ammonia test conducted by a laboratory accredited to do the test total ammonia test conducted by a laboratory accredited to do the test total ammonia test conducted by a laboratory accredited to do the test total ammonia test conducted by a laboratory accredited to do the test
pH test method pH test conducted by a laboratory accredited to do the test pH test conducted by a laboratory accredited to do the test pH test conducted by a laboratory accredited to do the test pH test conducted by a laboratory accredited to do the test
Effluent Quality - Acute Lethality
Annual Average Daily Volume (m3)[i] 100 to ≤ 2,500 > 2,500 to ≤ 17,500 > 17,500 to ≤ 50,000 > 50,000
Acute lethality non-acutely lethal effluent non-acutely lethal effluent non-acutely lethal effluent non-acutely lethal effluent
Sample type grab grab grab grab
Sampling frequency not specified quarterly but at least 60 days after any other sample quarterly but at least 60 days after any other sample monthly but at least 21 days after any other sample
Sampling frequency reduction not applicable annually but at least 6 months after any other sample annually but at least 6 months after any other sample quarterly but at least 60 days after any other sample
Sampling frequency upon failure twice a month until 3 consecutive passes twice a month until 3 consecutive passes twice a month until 3 consecutive passes twice a month until 3 consecutive passes
Procedures single or multiple concentration with or without pH stabilization single or multiple concentration with or without pH stabilization single or multiple concentration with or without pH stabilization single or multiple concentration with or without pH stabilization
Reference Method EPS 1/RM/13 Procedure set out in section 5 or 6 of Biological Test Method: Reference Method for Determining Acute Lethality of Effluents to Rainbow Trout (EPS 1/RM/13 Second Edition), December 2000 with May 2007 amendments, published by the Department of the Environment, as amended from time to time. Procedure set out in section 5 or 6 of Biological Test Method: Reference Method for Determining Acute Lethality of Effluents to Rainbow Trout (EPS 1/RM/13 Second Edition), December 2000 with May 2007 amendments, published by the Department of the Environment, as amended from time to time. Procedure set out in section 5 or 6 of Biological Test Method: Reference Method for Determining Acute Lethality of Effluents to Rainbow Trout (EPS 1/RM/13 Second Edition), December 2000 with May 2007 amendments, published by the Department of the Environment, as amended from time to time. Procedure set out in section 5 or 6 of Biological Test Method: Reference Method for Determining Acute Lethality of Effluents to Rainbow Trout (EPS 1/RM/13 Second Edition), December 2000 with May 2007 amendments, published by the Department of the Environment, as amended from time to time.
Procedure for pH Stabilization EPS 1/RM/50 Procedure for pH Stabilization During the Testing of Acute Lethality of Wastewater Effluent to Rainbow Trout (EPS 1/RM/50), March 2008, published by the Department of the Environment, as amended from time to time. Procedure for pH Stabilization During the Testing of Acute Lethality of Wastewater Effluent to Rainbow Trout (EPS 1/RM/50), March 2008, published by the Department of the Environment, as amended from time to time. Procedure for pH Stabilization During the Testing of Acute Lethality of Wastewater Effluent to Rainbow Trout (EPS 1/RM/50), March 2008, published by the Department of the Environment, as amended from time to time. Procedure for pH Stabilization During the Testing of Acute Lethality of Wastewater Effluent to Rainbow Trout (EPS 1/RM/50), March 2008, published by the Department of the Environment, as amended from time to time.
Reporting Requirements
Annual Average Daily Volume (m3)[i] 100 to ≤ 2,500 > 2,500 to ≤ 17,500 > 17,500 to ≤ 50,000 > 50,000
Reporting frequency annually annually quarterly quarterly
Report due within 45 days after the end of the calendar year within 45 days after the end of the calendar year within 45 days after the end of the quarter within 45 days after the end of the quarter
Information required

a statement that indicates that effluent was not deposited during the year or a statement that indicates that effluent was not deposited during any month in the year; and, for the year:

  • number of days effluent was deposited
  • volume (m3) of effluent deposited
  • average CBOD
  • average SS concentration

a statement that indicates that effluent was not deposited during the year or a statement that indicates that effluent was not deposited during any month in the year; and, for the year:

  • number of days effluent was deposited
  • volume (m3) of effluent deposited
  • average CBOD
  • average SS concentration

a statement that indicates that effluent was not deposited during the quarter or a statement that indicates that effluent was not deposited during any month in the quarter; and, for each month during which effluent was deposited in the quarter:

  • number of days effluent was deposited
  • volume (m3) of effluent deposited
  • average CBOD
  • average SS concentration

a statement that indicates that effluent was not deposited during the quarter or a statement that indicates that effluent was not deposited during any month in the quarter; and, for each month during which effluent was deposited in the quarter:

  • number of days effluent was deposited
  • volume (m3) of effluent deposited
  • average CBOD
  • average SS concentration
Information required

for each sample for which a determination of acute lethality was made a statement that indicates:

  • sampling date
  • procedure used in Reference Method EPS 1/RM/13
  • if the pH stabilization procedure EPS 1/RM/50 was used
  • if sample was acutely lethal

for each sample for which a determination of acute lethality was made a statement that indicates:

  • sampling date
  • procedure used in Reference Method EPS 1/RM/13
  • if the pH stabilization procedure EPS 1/RM/50 was used
  • if sample was acutely lethal

for each sample for which a determination of acute lethality was made a statement that indicates:

  • sampling date
  • procedure used in Reference Method EPS 1/RM/13
  • if the pH stabilization procedure EPS 1/RM/50 was used
  • if sample was acutely lethal

for each sample for which a determination of acute lethality was made a statement that indicates:

  • sampling date
  • procedure used in Reference Method EPS 1/RM/13
  • if the pH stabilization procedure EPS 1/RM/50 was used
  • if sample was acutely lethal

C. Transitional Authorization (TA) - January 1, 2015 until December 31, 2020, 2030 or 2040

Volume Deposited
Annual Average Daily Volume (m3)[i] 100 to 17,500 > 17,500
Daily volume determination continuous measure of influent or effluent volume or measure rate of influent or effluent flow or estimate based on generally accepted engineering practices continuous measure of influent or effluent volume or measure rate of influent or effluent flow or estimate based on generally accepted engineering practices
Effluent Quality - Carbonaceous Biochemical Oxygen Demand (CBOD), Suspended Solids (SS)
Annual Average Daily Volume (m3)[i] 100 to 17,500 > 17,500
CBOD (mg/L) annual average ≤ (1.25 x 12-month average submitted in the application for TA) if the 12 month average in the application was > 20 or annual average ≤ 25 monthly average ≤ (1.25 x greatest monthly average submitted in the application for TA) if the greatest monthly average in the application was > 20 or monthly average ≤ 25
SS (mg/L) annual average ≤ (1.25 x 12-month average submitted in the application for TA) if the 12 month average in the application was > 20 or annual average ≤ 25 monthly average ≤ (1.25 x greatest monthly average submitted in the application for TA) if the greatest monthly average in the application was > 20 or monthly average ≤ 25
Type of sample composite or grab composite or grab
Sampling frequency
  • if discharge period > 30 days: every 2 weeks but at least 7 days after any other sample
  • if discharge period ≤ 30 days: once per period
  • if discharge period > 30 days: every 2 weeks but at least 7 days after any other sample
  • if discharge period ≤ 30 days: once per period
CBOD test method 5-day BOD test with nitrification inhibition conducted by a lab accredited to do the test 5-day BOD test with nitrification inhibition conducted by a lab accredited to do the test
SS exception (> 25 mg/L, Jul. - Oct.)[ii] yes yes
SS test method total suspended solids test conducted by a laboratory accredited to do the test total suspended solids test conducted by a laboratory accredited to do the test
Effluent Quality - Total Residual Chlorine (TRC) [iv]
Annual Average Daily Volume (m3)[i] 100 to 17,500 > 17,500
TRC (mg/L) annual average ≤ 0.02 monthly average ≤ 0.02
Effluent Quality - Un-ionized Ammonia (NH 3)
Annual Average Daily Volume (m3)[i] 100 to 17,500 > 17,500
NH3 (mg/L, expressed as nitrogen (N) at 15ºC ± 1ºC) maximum concentration in the year < (1.25 x greatest maximum concentration submitted in the application for TA) if the greatest maximum concentration in the application was ≥ 1 or < 1.25 maximum concentration in the month < (1.25 x greatest maximum concentration submitted in the application for TA) if the greatest maximum concentration in the application was ≥ 1 or < 1.25
Sampling frequency not specified not specified
Total ammonia test method total ammonia test conducted by a laboratory accredited to do the test total ammonia test conducted by a laboratory accredited to do the test
pH test method pH test conducted by a laboratory accredited to do the test pH test conducted by a laboratory accredited to do the test
Effluent Quality - Acute Lethality
Annual Average Daily Volume (m3)[i] 100 to 17,500 > 17,500
Requirements none none
Monitoring Report
Annual Average Daily Volume (m3)[i] 100 to 17,500 > 17,500
Reporting frequency annually quarterly
Report due within 45 days after the end of the calendar year within 45 days after the end of the quarter
Information required

a statement that indicates that effluent was not deposited during the year or a statement that indicates that effluent was not deposited during any month in the year; and, for the year:

  • number of days effluent was deposited
  • volume (m3) of effluent deposited
  • average CBOD
  • average SS concentration

a statement that indicates that effluent was not deposited during the quarter or a statement that indicates that effluent was not deposited during any month in the quarter; and, for each month during which effluent was deposited in the quarter:

  • number of days effluent was deposited
  • volume (m3) of effluent deposited
  • average CBOD
  • average SS concentration
Progress Report
Allocated points from Schedules 2 and 3[v] Final discharge point ≥ 70 Final discharge point ≥ 50 and < 70 Final discharge point < 50 or, a CSO point > Final discharge point
First report due June 30, 2017 June 30, 2020 June 30, 2020
Second report due - June 30, 2025 June 30, 2025
Third report due - - June 30, 2030
Fourth report due - - June 30, 2035
Information required

steps taken to implement plan to modify wastewater system to:

  • meet effluent quality standards for CBOD and SS
  • achieve non-acutely lethal effluent
  • reduce quantity of deleterious substances deposited via overflow points (if applicable)

steps taken to implement plan to modify wastewater system to:

  • meet effluent quality standards for CBOD and SS
  • achieve non-acutely lethal effluent
  • reduce quantity of deleterious substances deposited via overflow points (if applicable)

steps taken to implement plan to modify wastewater system to:

  • meet effluent quality standards for CBOD and SS
  • achieve non-acutely lethal effluent
  • reduce quantity of deleterious substances deposited via overflow points (if applicable)
Change to plan changed plan sent to authorization officer without delay changed plan sent to authorization officer without delay changed plan sent to authorization officer without delay
Transitional Authorization Expiry Date
Allocated points from Schedules 2 and 3[v] Final discharge point ≥ 70 Final discharge point ≥ 50 and < 70 Final discharge point < 50 or, a CSO point > Final discharge point
Deadline to meet effluent quality standards for CBOD and SS December 31, 2020 December 31, 2030 December 31, 2040

D. Temporary Authorization to Deposit Un-ionized Ammonia - January 1, 2015 (valid for 3 years with option to extend for successive periods of 3 years)

Volume Deposited
Annual Average Daily Volume (m3)[i] 100 to 17,500 > 17,500
Daily volume determination continuous measure of influent or effluent volume or measure rate of influent or effluent flow or estimate based on generally accepted engineering practices continuous measure of influent or effluent volume or measure rate of influent or effluent flow or estimate based on generally accepted engineering practices
Effluent Quality Standards - Carbonaceous Biochemical Oxygen Demand (CBOD), Suspended Solids (SS)
Annual Average Daily Volume (m3)[i] 100 to 17,500 > 17,500
CBOD (mg/L) annual average ≤ 25 monthly average ≤ 25
SS (mg/L) annual average ≤ 25 monthly average ≤ 25
Type of sample composite or grab composite or grab
Sampling frequency
  • if discharge period > 30 days: every 2 weeks but at least 7 days after any other sample
  • if discharge period ≤ 30 days: once per period
  • if discharge period > 30 days: every 2 weeks but at least 7 days after any other sample
  • if discharge period ≤ 30 days: once per period
CBOD test method 5-day BOD test with nitrification inhibition conducted in a lab accredited to do the test 5-day BOD test with nitrification inhibition conducted in a lab accredited to do the test
SS exception (> 25 mg/L, Jul. - Oct.)[ii] yes yes
SS test method total suspended solids test conducted in laboratory accredited to do the test total suspended solids test conducted in laboratory accredited to do the test
Effluent Quality Standard - Total Residual Chlorine (TRC) [iv]
Annual Average Daily Volume (m3)[i] 100 to 17,500 > 17,500
TRC(mg/L) annual average ≤ 0.02 monthly average ≤ 0.02
Effluent Quality - Un-ionized Ammonia (NH 3)
Annual Average Daily Volume (m3)[i] 100 to 17,500 > 17,500
Type of sample composite or grab composite or grab
Sampling frequency
  • if discharge period > 30 days: every 2 weeks but at least 7 days after any other sample
  • if discharge period ≤ 30 days: once per period
  • if discharge period > 30 days: every 2 weeks but at least 7 days after any other sample
  • if discharge period ≤ 30 days: once per period
Total ammonia test method total ammonia test conducted by a laboratory accredited to do the test total ammonia test conducted by a laboratory accredited to do the test
pH test method pH test conducted by a laboratory accredited to do the test pH test conducted by a laboratory accredited to do the test
Receiving Environment Quality - Un-ionized Ammonia (NH 3) [vi]
Annual Average Daily Volume (m3)[i] 100 to 17,500 > 17,500
NH3 (mg/L, expressed as nitrogen (N)) ≤ 0.016 ≤ 0.016
Frequency once each August once each August
NH3 determination (mg/L, expressed as nitrogen (N)) total ammonia test conducted by a laboratory accredited to do the test and pH of the receiving environment or total ammonia using a method of estimation based on generally accepted engineering practices and pH of the receiving environment total ammonia test conducted by a laboratory accredited to do the test and pH of the receiving environment or total ammonia using a method of estimation based on generally accepted engineering practices and pH of the receiving environment
Effluent Quality - Acute Lethality
Annual Average Daily Volume (m3)[i] 100 to 17,500 > 17,500
Sampling frequency not specified but sampling may be required to apply for an extension of authorization not specified but sampling may be required to apply for an extension of authorization
Reference Method EPS 1/RM/13 Procedure set out in section 5 or 6 of Biological Test Method: Reference Method for Determining Acute Lethality of Effluents to Rainbow Trout (EPS 1/RM/13 Second Edition), December 2000 with May 2007 amendments, published by the Department of the Environment, as amended from time to time. Procedure set out in section 5 or 6 of Biological Test Method: Reference Method for Determining Acute Lethality of Effluents to Rainbow Trout (EPS 1/RM/13 Second Edition), December 2000 with May 2007 amendments, published by the Department of the Environment, as amended from time to time.
Procedure for pH Stabilization EPS 1/RM/50 Procedure for pH Stabilization During the Testing of Acute Lethality of Wastewater Effluent to Rainbow Trout (EPS 1/RM/50), March 2008, published by the Department of the Environment, as amended from time to time. Procedure for pH Stabilization During the Testing of Acute Lethality of Wastewater Effluent to Rainbow Trout (EPS 1/RM/50), March 2008, published by the Department of the Environment, as amended from time to time.
Reporting Requirements
Annual Average Daily Volume (m3)[i] 100 to 17,500 > 17,500
Reporting frequency annually quarterly
Report due within 45 days after the end of the calendar year within 45 days after the end of the quarter
Information required

a statement that indicates that effluent was not deposited during the year or a statement that indicates that effluent was not deposited during any month in the year; and, for the year:

  • number of days effluent was deposited
  • volume (m3) of effluent deposited
  • average CBOD
  • average SS concentration
  • for each sample taken: NH3 concentration and date of sampling

a statement that indicates that effluent was not deposited during the quarter: or a statement that indicates that effluent was not deposited during any month in the quarter; and, for each month during which effluent was deposited in the quarter:

  • number of days effluent was deposited
  • volume (m3) of effluent deposited
  • average CBOD
  • average SS concentration
  • for each sample taken: NH3 concentration and date of sampling
Information required each August: concentration of NH3 in receiving environment and how it was determined each August: concentration of NH3 in receiving environment and how it was determined

E. Combined Sewer Overflows - January 1, 2013

Recording

Each deposit day
  • date of deposit via overflow point
  • duration or estimated duration of deposit in hours
  • daily volume or estimated daily volume in m3
Each deposit month
  • volume or estimated volume of effluent deposited via overflow point for the month in m3
  • number of days effluent was deposited in the month

Reporting

Month of overflow
  • volume or estimated volume of effluent deposited via overflow point for the month in m3
  • number of days effluent was deposited in the month
Month of no deposit statement indicating no deposit
Reporting frequency annually, by February 15, beginning on February 15, 2014

[i] Annual average daily volume is the total volume, in m3, of effluent deposited via the final discharge point of a wastewater system divided by the number of days in the calendar year. Monitoring and reporting requirements for the calendar year are based on the annual average daily volume deposited in the previous calendar year.

[ii] In the WSER, if individual TSS results exceed 25 mg/L in the months of July, August, September or October, these results are not to be included in the average.

[iii] Requirement to monitor NH3 ends June 30, 2014.

[iv] Exception: Effluent quality standard for total residual chlorine comes into force January 1, 2021 for systems with annual average daily volume of < 5000 m3.

[v] Exception: If the final discharge point is allocated 50 or more points (under Schedule 2) and the wastewater system has at least one combined sewer overflow point which is allocated more points (under Schedule 3) than the number of points allocated to the final discharge point then the points allocated to the combined sewer overflow point may be used in the application for a transitional authorization that would expire on December 31, 2040.

[vi] Any point that is 100 m from the point of entry where effluent is deposited in the water via the final discharge point.

Report a problem or mistake on this page
Please select all that apply:

Thank you for your help!

You will not receive a reply. For enquiries, contact us.

Date modified: