Currently, I don't think the water that is sitting is doing any damage, but it doesn't take much rain to pool up.

You cant get water from a rock.... i just think its better for me to eat some of this so my tenants can remain stable and able to pay rent.

As of 3.25.2020 less than 1% of our tenants have reached out to our firm about potential interruption in rental payments. ...Still water run deep (when TSHTF in tenant land). 

I fear you will start to see under-financed PM's dipping into the Trust accounts to keep their heads above water and many just closing the doors.

Does anyone know a good resource for a reliable estimate of water/sewer/heat in this area?

There is a dock with 100' water front. 2 parcels have actual water front and the taxes reflect this. 

Lastly, check with whatever municipality this is in to see if there are rental license fees/trash fees/water/sewer etc.

This includes fire or electrical hazards, plumbing issues that can result in a lack of hot water or water damage, lack of heat, lead paint remediation, etc.

@James DolanI take the current owner does not have sewer/water line insurance?

Why can’t they sell their personal residence---- everyone does need shelter just like everyone does need food and water, yet the baffling question is... why do they need to pass the buck onto the tenant, who is the customer, for what is in reality their inability to meet a commitment they made?