Not over, but near. Some municipalities have specific by-laws dictating how close you can place your pool to your septic field. Our municipality didn't have a by-law, but recommended a minimum of 9' between the edge of the pool deck and the septic field. At a minimum, be careful not to allow your pool deck (whether concrete or patio stone) to extend over your septic field because the performance of your septic system could be seriously impaired. If it can be avoided - I would avoid it at all costs. A septic field isn't as stable as the surrounding area would be. The ground shifts more. As the ground shifts - your pool shifts -and not all together
causing damage that can not be fixed.
Good Question one of the most popular in the building industry that I get.
Every building official will have a code for minimum distances your going to be able to build near them, remember I said Minimum.
You first have to understand a bit about a septic field, it is designed to evaporate the liquids from your septic tank, so in order to do that it will not work correctly if the bed of stone and sand and pipe has more than 3' of cover over it.
Secondly you must figure where your next field is going to be if your first field gets saturated and it no longer works because of contamination. That's your back-up field area.
Next figure how your pool will impact your field as the new concrete pond will send lots more water to that area from rain snow and not to mention what happens if the pool springs a leak, you got two leaks mixing.
Its a good idea to keep your septic field protected, even if your not getting a new pool. Please don't drive over it getting to the back yard or front, and on the same hand don't let heavy construction trucks or delivery truck either, the pipe can be easily crushed.
A wet field is also a huge health hazard, not to mention the smell.
Licensed and insured professional pool builders are available for your project to get it done right and safe at all stages.
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