this post was submitted on 20 May 2026

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Our backyard turned into a swamp after septic system started failing, what are the warning signs most people miss? (travaux17.fr)

submitted 4 days ago by AsleepYogurt2104@lemmy.world to c/asklemmy@lemmy.world

14 comments fedilink hide all child comments

We bought our house three years ago and everything seemed fine with the septic system. The inspection report said it was "functional but aging" which we thought was no big deal. Fast forward to last spring and we started noticing a few things that we completely ignored at first.

The grass over the drain field was greener and growing faster than the rest of the yard. We actually thought that was a good thing. Then we started getting a faint smell near the back of the house after heavy rain, nothing terrible just a slight sewage odor that would go away after a day or two. We figured it was normal for an older system. Then one morning after a week of rain the whole back section of the yard was soggy and spongy to walk on, and there was grey water pooling near where the drain field ends.

Turns out the drain field had been slowly failing for probably over a year and all those "minor" signs were the system screaming for help. The septic tank itself was fine but the soil around the drain field had become completely saturated and could no longer absorb anything. We had to get the whole drain field replaced which was not cheap. Looking back the signs were all there and if we had caught it earlier we could have probably saved a lot of money by just doing maintenance and partial repairs instead of a full replacement. The guy who did the work told us that most homeowners ignore the early warnings because they don't know what to look for.

So for anyone with a septic system what warning signs did you miss or catch early? And for those who had to replace or repair theirs what was the process like and how much did it end up costing? Would love to hear other people's experiences so nobody else makes the same mistakes we did.

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[–] village604@adultswim.fan 46 points 4 days ago (1 children)

The sign here was the report saying, "functional, but ageing." That means it's time to get a quote on repairs and start budgeting on a replacement system.

You're supposed to get the system inspected on a regular basis, as well as flushing the bacteria stuff, to prevent this.

There aren't a ton of signs that it's starting to fail besides the swamp, unfortunately. You might notice a stronger smell, or you might be able to catch the swamp forming early.

You could also learn how to inspect your system and check it evey 6 months or so.

[–] IWW4@lemmy.zip 2 points 3 days ago

Unless their house is huge or they use a lot of water, septic systems get inspected every three years.

They bought the house three years ago and had it inspected.

They probably didn’t get it pumped out at that time though.

[–] AwesomeLowlander@sh.itjust.works 7 points 4 days ago* (last edited 4 days ago) (3 children)

TIL about drain fields. In my country there's a govt agency to take care of cleaning out your septic tank every 2 years, so I never needed to know what was going on.

You mentioned that the drain field had gotten saturated. If you had done maintenance / repairs, what would the solution have been do deal with the saturation?

[–] seathru@quokk.au 10 points 3 days ago* (last edited 3 days ago) (1 children)

You mentioned that the drain field had gotten saturated. If you had done maintenance / repairs, what would the solution have been do deal with the saturation?

If they had done the maintenance, the drain field would likely not need to be replaced. One of the purposes of the septic tank is to contain solids that the ecosystem inside of the tank can not break down (like wet wipes). It periodically needs sucked out, and people don't realize this. Once it is full of insoluble material , that material starts going out into the drain field and depositing into the dirt. Eventually turning the dirt into something like clay, that can't really help spread out the excess water and allow it to evaporate.

Disclaimer: Just a person researching a future septic system, not professional advice.

[–] ArbitraryValue@sh.itjust.works 6 points 3 days ago

(like wet wipes)

Someone flushes a wet wipe into your septic tank? Justifiable homicide.

[–] Pyr_Pressure@lemmy.ca 3 points 3 days ago

I don't know of a way to clean/maintain a drain field.

From what I understand the tank captures the solids and the liquids rise to the top after everything settles and goes through a series of small tubes to drain into a field and be filtered through the soil.

Then the tanks gets cleaned every 2-3 years to remove the built up solids.

Usually the series of tubes in the deain field are all underground and inaccessible so I don't think there is a way to clean or maintain them.

When we had our house inspected the plumber couldn't even locate the drain field. Just told us it switched in this part of the yard or that part of the yard.

[–] i_stole_ur_taco@lemmy.ca 2 points 3 days ago (1 children)

Your country must have some awesome nicknames for that government agency.

[–] AwesomeLowlander@sh.itjust.works 7 points 3 days ago

It literally translates to 'Beautiful Water'. Can't get more poetic than that.

[–] EvacuateSoul@lemmy.world 4 points 3 days ago

You can save a lot if you redo your own drain field. There are bottomless trench options that make it easier. When my BIL was having issues, we did it all by hand in a weekend with rock and perforated pipe, and it was enormous. Looked like WW1 back there.

It's legal to make repairs yourself in my state, but once the grass grows back, who is gonna know anyways?

We improved his by 90ing up to cleanouts just below the surface. Put some scrap metal by each one so you can find it again. Then you can jet out the system downstream without hoping your line jets into the correct tee.

[–] EndlessNightmare@reddthat.com 5 points 3 days ago

"Swamp" is really underselling the mess

[–] SubArcticTundra@lemmy.ml 2 points 3 days ago (1 children)

It's crazy that all that shit can just seep into the ground

[–] Brkdncr@lemmy.world 2 points 3 days ago

Shit can’t. Piss can. That’s how septic systems work.

Going three years without it being serviced is probably an issue.

[–] roofuskit@lemmy.world -5 points 4 days ago (1 children)

Your first septic system?

[–] i_stole_ur_taco@lemmy.ca 4 points 3 days ago

I think they’ve now spent so much money that it’s their first and second septic system.