Fertilizer that contains phosphorus is prohibited in westchester county. This has been the law since 2009.
https://truesdalelake.com/2009/04/westchester-county-passes-phosphorus-fertilizer-ban/
If you use fertilizer you MUST choose one that has 0% phosphorus.
If you use any other fertilizer, you must keep it at least 20 feet away from the lake – otherwise you just end up fertilizing the lake weeds (no thank you! we pay tens of thousands of dollars a year to keep that stuff from getting out of hand!).
Note: Pet waste also contains phosphorus and should be cleaned up and disposed of in trash to keep it out of our lake’s water column. https://truesdalelake.com/2014/09/get-the-scoop-on-poop/
Below is a generic brochure about phosphorus fertilizers and the harm they can cause. Keep the phosphorus out of our lake – DON’T USE PHOSPHORUS BASED FERTILIZER!
And tell your lawn care company this as well if you don’t do it yourself. They should know it if they are licensed in Westchester — but they may not be aware if they are coming from Connecticut.