It usually only affects those with pre-existing respiratory issues.The law does not require you to snap your fingers and make the issue disappear immediately.

One of the upstairs tenants has a respiratory problem and coughs a lot, the complaining tenant can hear it and wants me to make that stop.

If you paint over it and someone ends up having respiratory problems, and then finds out there was mold in the house and you didn't investigate it and treat it properly, you can be sued.

"These sulphide gases are also alleged to cause serioushealth conditions and illnesses, such as shortness of breath, dizziness, headaches, fatigue, insomnia, eye irritations and respiratory difficulties.""

I am currently working as a registered respiratory therapist.

Pin holes leaks in pipes, and persistent respiratory issues for our entire family, make us wonder if it's better just to move on, than try to get the landlord to help investigate/remediate the issue. 

Understanding that we could likely weather the monetary storm using the $150,000 in equity in our home, we were next stricken with respiratory and other health issues.

I chose to forgo my interests in real estate a couple of years ago and chose respiratory therapy and I am now burned out.

Tenants with respiratory ailments, allergies, or any other physical or mental condition relating to smoke are put on notice that Landlord does not assume any higher duty of care to enforce this section.

Please note that this is not an apartment - rather he is renting a single room in a house and tenants in other rooms are not going to report him but will complain that they have asthma or other respiratory conditions and want to quit.Any actionable and constructive  (operational) suggestions are much appreciated.