WHAT ARE THE WARNING SIGNS A SEPTIC SYSTEM IS FAILING?

A failing septic system almost always tells on itself before it quits. Watch for slow drains and gurgling fixtures inside, and outside for a soggy patch, a stripe of unusually green grass, or a sewage smell over the tank or leach field. Any one of those means make a call now.

Septic systems rarely fail all at once. The early signs are easy to write off: a shower draining slow, a low spot still wet a week after the ditch water shut off. Catching it early is the difference between a repair and a new leach field.

What Are the Symptoms of a Septic System Failure?

Symptoms show up in two places: inside at the fixtures, and outside over the tank and leach field. Inside, the system warns you before it actually backs up. Outside, it tells you the drain field has quit taking water. One sign alone might be a clog; two or three together usually is not.

• Drains slowing down all over the house, the lowest fixture first
• Gurgling in the pipes when a fixture drains
• A sewage smell near the tank, the risers, or the leach field
• Standing water or spongy ground over the drain field
• A patch of grass over the field greener and faster-growing than the rest of the yard
• Sewage backing up into a floor drain or the lowest toilet

Slow Drains on a Septic System: A Clog, or Something Bigger?

The quickest way to tell is whether it is one fixture or all of them. A single slow sink or tub is almost always a clog in that line, which is a plumbing problem, not a septic one. When everything slows at once, lowest drains first, the trouble is downstream at the tank or field.

Gurgling is the tell most people miss. Air that should vent out is pushing back through the trap instead, which means something is restricting flow between house and tank, or the tank is too full to take any more.

What Does a Soggy Spot Over the Leach Field Tell You?

A soggy spot over the leach field means effluent is surfacing instead of soaking in, and that is the clearest outdoor sign the field is in trouble. When the ground over the field stays wet in dry weather, holds a boot print, or grows a stripe of bright green grass along the trench lines, the soil underneath has quit accepting water.

A few things cause that: a biomat sealed off the trench bottom over years of use, solids plugged the field, or the ground is saturated from something else. That last one matters around here. A field below a running ditch or a flood-irrigated pasture can look like a failure in June and behave fine in October, so rule it out before anybody digs.

What Causes a Septic Backup?

Most backups trace to a full tank, a clogged inlet or outlet, a failed pump, or a leach field that cannot take any more water. It is the system telling you the water has nowhere left to go. Usual culprits:

• A tank gone so long without pumping that the sludge layer reached the outlet
• An effluent filter at the tank outlet plugged solid
• Roots or a collapsed line between the house and the tank
• A pump or float failure in a system that pumps uphill to the field
• A leach field at the end of its service life

A Tuf-Tite or Orenco effluent filter is doing its job when it plugs. It kept solids out of the leach field, the expensive part. Pulling and rinsing it is maintenance, not a repair.

What Makes Western Colorado Hard on a Septic System?

Irrigation water and freeze-thaw. In the North Fork Valley and around Olathe and Delta, plenty of septic systems sit on ground that gets flood-irrigated, sits below a ditch, or catches hillside runoff. Soil already carrying water cannot absorb effluent, so a field that behaves in March can surface in July.

Freeze-thaw works on the shallow parts: risers, lids, the first stretch of line. Ground that heaves and settles every year pulls at joints and can shift a lid out of seal. If your lids no longer seat right, fix that before snowmelt finds the tank.

Not sure what you are looking at? Our walk-through of the parts of a septic system is a good place to start.

What Should a Contractor Check Before Quoting a Repair?

Tank first, filter second, field last. Pump and inspect the tank, check the baffles, pull the filter, and note where the liquid level sits relative to the outlet. A level above the outlet points at the field; one at the outlet with a plugged filter points at skipped maintenance.

From there it is a question of what the site supports. We stock it either way, from Infiltrator chambers and Eljen modules to Tuf-Tite risers and filters, Orenco pump packages, and Zoeller pumps, and can build a materials list off a design or an as-built. Anything needing a permit goes through county environmental health; Delta County's OWTS page is the place to start.

Common Questions

How do I know if my septic tank is full or if the drain field has failed?

Pump the tank and watch what happens. If the drains clear and stay clear, the tank was simply full. If it refills fast, or the liquid level sits above the outlet pipe, water is backing up out of the leach field and pumping only bought you a few weeks. A septic pumper can tell on site.

Is bright green grass over the leach field always a bad sign?

Not always, but it is worth a look. A drain field puts moisture and nutrients into the soil, so some extra green is normal. What is not normal is grass growing in a distinct stripe, staying spongy underfoot, or greening up in a dry stretch when the rest of the yard has gone brown.

Can a failing leach field be fixed, or does it have to be replaced?

It depends on why it failed. A plugged effluent filter, a bad pump, or roots in a line are repairs. A field that has sealed off after decades of use usually needs a new field or a replacement area instead. Getting the tank inspected first tells you which conversation you are actually having.

What should I do first if sewage backs up into the house?

Stop running water. No laundry, no dishwasher, no long showers. Then call a septic pumper. Cutting off the water going in keeps the backup from getting worse while you wait. Do not reach for tank additives or drain chemicals hoping to clear it, because they will not fix a full tank or a failed field.

Most septic failures give you months of warning if you know what to look for: slow drains, gurgling, a wet spot with no business being there. If you have got one, come see us in Hotchkiss or Olathe. We have been stocking septic and wastewater components since 1964. Send us your plans and we'll put together an accurate materials list.