If you need to temporarily discharge groundwater or surface water into Markham’s sanitary or storm sewer system, you must submit an application and get approval from the City. This temporary water discharge could come from activities such as: extracting groundwater at construction sites, emptying tank, cleaning pond, etc.

In some cases, you may need to obtain additional approval from York Region because Markham's sewer system is integrated with York Region’s sewer system. Markham staff will advise you when the additional approval is required.

• Region-wide Temporary Discharge Permit Application Form (PDF)
  
• Markham's Discharge Request Approval Fee: $1,718.17 (2023 Rate *Including HST)