For septic systems or septic system holding tanks subject to an Environmental Compliance Approval in accordance with the Ontario Water Resources Act, where such systems are:

existing (including expansions, modifications or replacements); or
new and located within an ICA, but outside of a WHPA-A or B with a vulnerability score of 10,

and where these activities are, or would be, significant drinking water threats, the Ministry of the Environment shall review and, where necessary, amend Environmental Compliance Approvals to incorporate terms and conditions. These terms and conditions, when implemented, shall manage these activities so that they cease to be, or never become, significant drinking water threats.

The terms and conditions should include, but not necessarily be limited to:

requirements for the proponent/applicant to undertake mandatory monitoring of groundwater impacts;
contingencies in the event that drinking water quality is adversely affected;
regular and ongoing compliance monitoring;
mandatory system inspections at least every five (5) years;
annual reporting to the Source Protection Authority and the County on any required inspection or monitoring programs; and
upgrading of these septic systems to current standards, where necessary.

(OC-5.04): Where the Source Protection Plan policies may result in amendments to a prescribed instrument, the applicable Ministry shall summarize the actions taken the previous year to implement the policies and provide a written report summarizing this information to the Source Protection Authority and the County by February 1st of each year.