Sewer Discharge Limits & Permits - London

In London, Ontario, businesses that release wastewater to the municipal sewer system must follow local limits, obtain required permits, and report monitoring as specified by the city. This guide explains where limits are set, who enforces them, how to apply for an industrial discharge permit, and practical steps for compliance so your operation avoids enforcement actions and service disruptions.

Scope & Standards

London establishes limits on industrial and commercial wastewater discharges to protect the municipal collection and treatment system and downstream receivers. Limits typically cover parameters such as biochemical oxygen demand (BOD), suspended solids, pH, temperature, and prohibited substances. For the citys published standards and program overview, consult the City of London wastewater guidance and bylaw information on the official municipal site City of London Wastewater^[1].

Permits & Authorization

Many businesses require a permit or written authorization before discharging non-domestic wastewater. Permits set concentration limits, flow allocations, monitoring and reporting obligations, and specific best-management practices. The City administers industrial discharge permitting and related approvals; see the municipal permit information page for application steps and contacts Industrial Discharge Permit^[2].

Penalties & Enforcement

The City enforces sewer discharge rules through inspections, notices, orders and penalties. Specific fine amounts and structured escalation ranges are not consistently published on the municipal summary pages; where numeric penalties are not listed, the official pages state enforcement remedies without specific dollar amounts. For details shown on the city pages, see the cited municipal guidance and permit pages City of London Wastewater^[1] and the permit information Industrial Discharge Permit^[2].

• Fine amounts: not specified on the cited page; consult the permit or bylaw text linked above for any numeric penalties.
• Escalation: first, repeat, and continuing offences are handled by progressive orders and fines where published; specific ranges are not specified on the cited pages.
• Non-monetary sanctions: compliance orders, stop-work or stop-discharge orders, seizure or remediation orders, and court prosecution may be used.
• Enforcer: City of London Environmental Services and By-law Enforcement (Wastewater operations and compliance teams) perform inspections and respond to complaints.
• Appeals: appeal or review routes are typically through the administrative review process or provincial tribunals where the bylaw specifies; time limits for appeals are not specified on the cited summary pages.

Applications & Forms

Application and form names, fees, and submission methods are published on the Citys permitting pages. The common application is the industrial discharge permit; fee schedules and submission instructions are provided on the municipal permit page or via the environmental services contact listed there Industrial Discharge Permit^[2]. If a specific form number or fee is not shown on the cited page, the city pages note that applicants should contact Environmental Services for the current application packet.

• Form name: Industrial Discharge Permit application (see municipal permit page for packet).
• Fees: fee schedule not specified on the cited summary page; refer to the permit page or contact the city.
• Submission: apply via the City of London permit portal or email Environmental Services as instructed on the permit page.

Key Compliance Actions

• Sample and monitor wastewater regularly to demonstrate compliance with permit limits.
• Install pre-treatment or flow-control equipment when required by permit conditions.
• Keep accurate records of monitoring, maintenance and disposal for the retention period specified by the city or permit.

FAQ

Who needs an industrial discharge permit?

Any business that discharges non-domestic wastewater or process effluent to the municipal sewer beyond domestic-strength sewage should consult the City of London permit requirements to determine if a permit is required.

How long does permit approval take?

Approval timelines vary by complexity and required sampling; specific timelines are not specified on the cited municipal summary pages and applicants should contact Environmental Services for an estimate.

What must I report if my discharge exceeds limits?

Report incidents to City of London Environmental Services immediately and follow any mandatory incident reporting and corrective action procedures in the permit; see the city permit page for contact instructions.

How-To

1. Determine whether your discharge is industrial or domestic by reviewing process flows and constituents.
2. Collect representative wastewater samples and lab analyses for parameters likely regulated (BOD, TSS, pH, oils, heavy metals).
3. Contact the City of London Environmental Services to request the industrial discharge permit application and fee schedule.
4. Implement required pretreatment or controls identified during the permit review and schedule any required inspections.
5. Maintain monitoring records and submit reports as required by the permit; respond promptly to any notices from the city.

Key Takeaways

• Many commercial discharges need a permit and pre-discharge sampling.
• Enforcement includes orders and fines; specific amounts may require reviewing the permit or bylaw text.

Help and Support / Resources

• City of London - Wastewater Services
• City of London - Industrial Discharge Permit
• City of London - Bylaws and Municipal Code

1. [1] City of London - Wastewater Services
2. [2] City of London - Industrial Discharge Permit