As someone who has raised a quarter millions hogs, birth to market, I can assure you that no producer can exist if they don't provide the things you listed.
Animal feeds are targeted to the specific animals being fed, taking into account their sex, age, weight, and dozens of other factors. The feed formula changes often, sometimes weekly, so that the very optimum feed is fed to the animals. Everything that group of animals need is taken into account, vitamins, minerals, you name it, it's analyzed, adjusted, and changed as conditions change.
Water is a key element for all producers, and water quality is analyzed and included as a key feed component. Backup wells and pressure systems are incorporated into every step of the building and production plan. Backup electrical generators provide electrical power for the pumps in the event of power failure, which are often top of the line variable speed drives, rivaling the sophistication of those used by municipal water systems. The backup systems insure that the animal have a continuous supply a fresh water. In the pen or cage, the water delivery equipment used is manufactured from stainless steel and plastics to reduce the buildup of contaminants, and is scientifically placed so that all animals have easy access to what is the cheapest food ingredient, water.
I would assert that animals raised by the American farmer dine and drink a more scientifically balanced meal than 95% of Americans, and probably 99% of the world.
Air supply and airflow are engineered into the building even before the construction begins, and those engineering standards are derived from decades of research preformed by universities.
The amount of room each animal has is also determined by decades of research, and I addressed some of that up thread.
To sum things up, you can relax a bit about the animal cruelty theme often touted by the Luddites who want us to produce our food the way we did a hundred years ago.
If all those terrible things are practiced, the producer, if he is still in business, will unmercifully be driven out by the most terrible and unforgiving master one can have in business, economics.
Animals were not made to live in cages.
We know about the veal being raised so it doesn't even get to walk so it's meat will be tender.
We know about the cattle being raised eating meat scraps and being injected with drugs.
We also know that many food industries lobbying to not allow the consumer to know the difference between cage grown chickens and range chickens, cattle raised eating grass vs cattle eating meat scraps and drugged to fatten them up.