My brief research

I don't think HOA fees can be separated, but if HOA includes services such as trash removal, parking etc, you can collect fees on those separately.  Also I think water charge could be separated. 

See below. 

https://howtogeton.wordpress.com/legal-ways-to-pay-more-rent-on-section-8-housing-vouchers/

Separate Non-Rent Expenses

Some leases bundle in services that Housing Authorities do not consider rental expenses. For example:

• Pet fees
• Lawn care & snow removal
• Internet
• Parking spaces
• Cable
• Laundry facilities or washer/dryer in apartment
• Use of sheds or outbuildings
• Snow removal

Some of our readers were able to speak with their landlords and request to remove these fees from their rent. The fees were not included in the “rent,” but instead noted in the lease as a separate fee, or attached to the lease in an addendum.

所有跟帖： 

• 柠檬侠动作真快！多谢！我这里水费是包在HOA里面了，不好分开。不过可能可以在 -ice_tea- ♂ (156 bytes) () 02/27/2023 postreply 09:35:10

• 你可以随便开价，我只是说直接讲房客付HOA fee有点牵强，但是你说water charge $50 / months -柠檬椰子汁- ♂ (111 bytes) () 02/27/2023 postreply 09:42:53

• 哦， 那就没问题了。非常感谢！ -ice_tea- ♂ (0 bytes) () 02/27/2023 postreply 09:48:47

• 这些得在tenancy approval form 上填，由政府审批来最终决定政府数额，租客数额。 -MrsKwok- ♀ (0 bytes) () 02/27/2023 postreply 10:07:39

• 你说的做法可行也不违背HA规定。我这样办过。多收80水费垃圾费。HA提标准后终止。三方都没问题。 -QinHwang- ♂ (0 bytes) () 02/27/2023 postreply 12:11:03

• 知道了。以后可以用这个方法。这次没用上。多谢！ -ice_tea- ♂ (0 bytes) () 02/27/2023 postreply 15:39:45