In May 2019, West Chester Borough officially adopted a well-conceived mosquito abatement plan relying on controlling stagnant water and larviciding where needed. The text can be downloaded here in official form and also is copied below:

Regarding the spread of disease, such as West Nile Virus, through mosquitos, the Borough of West Chester has tasked the Public Works Department to implement the following action plan which replaces all other mosquito/West Nile Virus plans:
• The attainment of Larvicide Applicator Certification by at least two Public Works employees.
• Continue to store adequate quantity of dunks at its facility to be made available to Borough residents at their request.
• Elimination of all sumps from existing inlets inspected and found to facilitate ponding.
• Re-double its efforts to keep inlets clean and clear of debris that might inhibit proper drainage.
• Establish GIS mapping of current low-lying areas that are deemed susceptible to water ponding.
• Identify locations within the Borough that are potential “hot spots” for mosquito breeding for additional investigation by the Public Works Department.
• All activities must be consistently coordinated in concert with Chester County Health Department (CCHD) protocol.
• Constant communication must be kept with the CCHD as this will further enable the Public Works Department to be pro-active with on-going responses, by their ability to provide more detailed inspection and identification of potential breeding grounds.
• Direct residents who observe standing water on properties to call Building, Housing & Code Enforcement at 610-696-1773.