Policies that must be adhered to are based on several factors:
# The activity itself
# The are in which the activity will be taking place
# The vulnerability of the area in question
# The risks associated with the activity (does the activity result in one of the listed 22 risks occurring or potentially occurring)
# Other local factors that can increase the vulnerability to a nearby IPZs or WHPAs
For example, as of December of 2021 the CTC SPR that comprises the regions of Peel, Toronto, and Durham had nearly 130 Source Protection Policies in place within their SPP. These policies address 21 of the 22 types
of threats prescribed in O.Reg 287 along with two types of local drinking water threats, and include other actions that are considered by the CTC committee as necessary to protect drinking water sources, along with requirements for the need of monitoring being implemented. The CTC SPP also contain policies which require the need for Risk Management Plans (RMPs) dependent on the vulnerability of proposed actions/activities to better manage some drinking water threats (CTC Source Protection Region, 2021)<ref>CTC Source Protection Region. 2021. CTC Source Protection Region 2021 Annual Progress Report. Accessed 6 June 2022. https://ctcswp.ca/app/uploads/2022/05/RPT_20220501_CTCSPR_2021AnnualProgressReport_fnl.pdf)</ref>