Real estate is local and hyperlocal, so I imagine in some areas there may be encouragement to use gray water differently.. In my area, there is not a problem with such a thing. However, septic inspectors will recommend having a filter to reduce lint and hair, and many homes in my area that are on acreage will have a second septic system for gray water only near their crops or gardens so they can utilize that water. Every other square mile in my area is Tribal Agricultural land, and gray water is utilized for watering the crops.

What the regulations are today I have no clue. Many years ago when adding an addition to a home a neighbor installed a deep dry well, separate from the septic field for gray water. His septic system did not need pumping as regularly as others.

All water that exits my home goes into the septic system for processing. So yes. And my septic system was just designed/approved a few years ago (4).

That being said, I know of a house built in the 1800s that still has laundry water that goes out a pipe and just runs down the hill. That house also has a foundation made of rocks.

Hmm, I am not even sure where the water from my washing machine drains, but I would assume it drains into the sewer.

Ways a washing machine can impact a septic tank.

I believe all water goes into the septic system in our area unless someone specifically rerouted the gray water.

I'm not a septic professional but sure have attended enough inspections AND have my own system... My answer is that it certainly CAN be released into the septic system but will place an added strain on it.  The use of a drywell for gray water discharge can be a way to address this.  BUT... I defer to my septic buddies for the official answer!  :)

I have sold a few homes with septic systems, and all water from the home, goes into the septic system.

Here in Connecticut yes it is, each state and county could be different.

In Massachusetts, that's where grey water goes by Title 5 regulation. At my house, we use products that are safe to go into the septic via grey water.

Parked and Reading. 

We live in an area of septic systems. Most water is released into the septic fields. For laundry machines, specific detergents are recommended. Recently, a CT regulation required that additional leaching fields be installed if equipment such as water softeners are put in place in a home, to empty out into their own areas.

The logic says the systems in place work just fine yet there are exceptions. I am reminded of how electronics, paint, and insecticides have to be disposed of accordingly yet via temptation, people just go to "out of sight, out of mind" and disrespect the rules in place. It is subjective. That's why communities where pride of ownership is practiced work so well.

I’ve heard that TIDE injures Septic Systems

not only allowed, but required.  If I had my way a lot of my "waste water" would not, it would water my lawn and garden.  A little dish soap won't hurt plants.  But I am a rule follower.

I remember back in Pennsylvania older homes had a pipe just running out of the house into a stream, not today anymore

In NC & SC it is mandated that it does. They used to have separate drain lines but, no longer do.

Here in Maui County we are not allowed to drain gray water onto the ground and it should go into the septic system/cesspool.  Therefore I avoid using bleach in my washer.  Many people ignore the rules and use it to water their banana patch.

Honestly, I do not know. We have sewers around here, and I have a septic guy for my septic systems that come up, I can see where it would be beneficial to divert the greywater from the brown water. I really do not know, and do not know of any separate systems in my area for greywater disposal,

it's required, but stupid.  So we do it.

Most do, however I have seen a few that bypass the system and use the water to create a lush area of the lawn.

My house is on an old style cesspool. We took out the washing machine water from the cesspool once we got our final. 20 years later we took out our kitchen sink. The gray water goes down our valley and waters the gingers. This is a common but not legal practice in our area.