For septic systems or septic system holding tanks regulated under the Ontario Building Code Act, where such systems are:

existing (including modifications or replacements); or
new and required for a municipal supply well;

and where these activities are, or would be, significant drinking water threats, the Municipalities shall implement an on-site sewage system maintenance inspection program, as required by the Ontario Building Code Act so that these activities cease to be or never become significant drinking water threats.

5.08: Municipalities, and all other implementers, shall establish monitoring
programs as per Section 45 of the Clean Water Act. The information
collected through these monitoring programs shall be included in a
monitoring report that shall be submitted annually to the Upper Thames
River Conservation Authority. The information submitted to the
Conservation Authority shall be consistent with the guidance developed
pursuant to policy 5.02 where that guidance identifies items required to
meet provincial reporting requirements of the implementer or SPA.
Aspects of the guidance which are beyond that which is necessary to
satisfy provincial reporting requirements shall be considered in submitting
the monitoring reports. Monitoring reports are to be submitted by February
1 of each year following the first anniversary of the effective date of the
Source Protection Plan. Monitoring reports shall include information since
the submission of the previous monitoring report to December 31 of the
year previous to the deadline for report submission. For the first report, the
information shall include information from the effective date of the Source
Protection Plan.