Lagoon service

Septic lagoon service in Howell County

A septic lagoon is a fenced earthen basin that treats a home's wastewater in the open air, and out here in rural Missouri it is a common system for a single house. Servicing one runs about $150 to $300, less than pumping a tank, because there is less solid to haul and the visit is as much a check-up as a pump. Call the number on this page and you reach a licensed local contractor who works lagoons across the county. If you bought a place with a fenced pond down the hill and nobody explained it, this page is the explanation.

What a lagoon is, and why rural Missouri has them

A lagoon is a shallow, fenced basin dug into the ground that receives the wastewater from the house and treats it naturally. Sunlight, air, and bacteria break the waste down in the open water while the solids settle to the bottom as sludge. It is a real, recognized system for a single rural home in Missouri, not a makeshift setup, and it works because the alternative often does not. A conventional tank and lateral field needs ground that water can soak into, and the Ozark ground here fights that at every turn. The rocky chert soil sits over shallow bedrock, and the bottoms are heavy clay, so water percolates poorly. When a drain field will not drain, an open lagoon that treats water above ground is the system that actually functions, which is why they dot the countryside around West Plains and out toward the river country.

If you have a small fenced basin set away from the house, holding water that is not a stock pond and not a fishing pond, that is almost certainly your lagoon. It is doing the same job a tank and field would, just out in the light instead of underground.

What maintaining a lagoon involves

A lagoon is low effort but not no effort, and the handful of things it needs are simple once you know them. Keep up with these and a lagoon treats quietly for decades.

Mow and maintain the berm

The berm is the raised earthen wall around the basin. Keep it mowed so grass roots hold the soil and so you can actually see the water and spot burrowing animals or erosion. Do not let brush or saplings take hold on it, and never plant a tree there. Grass is exactly what you want on a berm and nothing taller.

Keep the fence up

The fence is there for a reason. It keeps children, pets, and livestock out of water that is treating sewage. A down or sagging fence is the first thing to fix, and in cattle country keeping stock out of the lagoon matters as much for the animals as for the lagoon.

Watch the water level and vegetation

A healthy lagoon holds a fairly steady level, usually a couple of feet of water, with a clean surface. Learn what normal looks like for yours. A level that climbs toward overflow or drops away for no reason both signal a problem. Duckweed or a heavy algae mat across the surface should be raked or skimmed off, because a surface choked with growth blocks the sunlight and air the water needs to treat.

Pump the sludge down periodically

Solids settle to the bottom and build up slowly over years. When that sludge layer gets deep enough to crowd the treating water, it is time to pump it down, which is the paid service visit. It happens far less often than a tank pump, but it does need to happen, and letting sludge fill the basin is what turns a working lagoon into a smelling one.

Keep it aerobic, not anaerobic

A lagoon treats best when its water stays oxygenated, which is what the open surface and sunlight are for. When it goes anaerobic, starved of oxygen, it turns dark and starts to smell strongly of sewage. Keeping the surface clear and the sludge pumped down is most of what keeps it breathing and sweet instead of sour.

Signs your lagoon is in trouble

A lagoon tells you when something is wrong if you know what to watch. Any of these is worth a call before it becomes a bigger problem or a neighbor complaint.

• A strong sewage smell. A healthy lagoon has only a faint earthy odor. A sharp sewage smell means it has likely gone anaerobic and needs attention.
• Dead or dying vegetation around the basin or downhill of it, which can point to overload or something surfacing that should not.
• Overflow. Water breaching the berm or running off is a clear sign the system is overloaded or blocked.
• A dropping level with no dry weather to explain it, which can mean a leak in the basin or a break somewhere in the line to it.

Most of these are fixable, and the fix is cheaper the sooner it happens. Catching a lagoon before it stops treating is the whole point of a service visit.

What not to do to a lagoon

A few habits do real damage, and they are easy to avoid once you know them.

• Do not dump harsh chemicals down the drain. Bleach, solvents, paint, and heavy cleaners in quantity kill the bacteria that do the treating, and a lagoon runs on those bacteria. Normal household use is fine; pouring chemicals is not.
• Do not let cattle or other livestock into it. They tear up the berm, foul the water, and can hurt themselves. This is a big part of why the fence exists.
• Do not plant trees on the berm. Roots crack and weaken the earthen wall and open leaks. Keep the berm in mowed grass only.
• Do not ignore the fence or the mowing. The small upkeep is what prevents the big repair.

Lagoon service and pumping cost

Pumping and servicing a lagoon runs about $150 to $300, less than a tank pump-out because there is less material to haul away. The visit usually covers pumping the sludge down and a look at the berm, the fence, the water level, and the vegetation, so you leave knowing the lagoon is treating rather than just guessing. That is the routine side. Replacing or rebuilding a failed lagoon is a much larger job that runs into the thousands and involves site work and the county, and it is separate from the service a pumping contractor provides. The cost page lays the ranges out side by side, and a lagoon caught early rarely needs anything close to a replacement.