North Texas Septic Maintenance Calendar: A 12-Month Checklist

Why septic care is seasonal in North Texas

Septic care in North Texas is seasonal because most systems here put treated water on the surface of a clay yard, and that yard goes through hard swings every year. Late spring brings heavy storms. Summer bakes the Blackland Prairie clay until it cracks. Winter can bring a hard freeze and a power outage in the same week.^source

An aerobic system with a spray field feels all of it. The spray heads, the aerator, the chlorinator, and the alarm panel all sit at or near the surface. A conventional drainfield is buried and quieter, but clay that stays soaked in May or split open in August affects it too.^source

Your licensed maintenance provider still inspects an aerobic system at least every four months no matter the season. This calendar covers what falls on you between those visits, and what to ask about when the provider shows up.^source

Month-by-month septic checklist for North Texas

Use this as a 12-month checklist. Most months take five minutes: a look at the alarm panel, a walk over the field, and a glance at the chlorinator. Mark your maintenance visit months and your contract expiration date on the same calendar.

Spring storm season: keep rain out of the tanks

The spring job is making sure storm water is not getting into the system. A septic system is sized for household wastewater, not rain, and Texas A&M AgriLife warns that water leaking into the tanks can flush sewage through the treatment unit and into the yard.

AgriLife's checklist is short and worth doing every spring:

• Look at the ground over the tanks for a depression where rainwater can pool. Fill low spots so water runs away from the lids.
• Check that risers are in good shape and sealed.
• Look inside the riser or tank seams for stains that show water has been getting in.
• Notice whether the system cycles a lot more than usual during rainy stretches, or sprays during a rain shower. Both suggest rainwater is getting in.
• Look at the grass around the tanks. AgriLife says unusually lush, darker green grass there points to a broken tank or pipe.

Summer heat and drought: what changes on clay

Summer is when the clay in Kaufman County shrinks and cracks, and your system keeps running through it. Blackland Prairie clay swells when wet and shrinks as it dries, so after a long dry spell you can see cracks you could slide a hand into.^source

Cracked clay matters in two ways. First, ground movement can shift risers, lids, and shallow lines, so a quick look at them after a dry spell is worth the time. Second, treated water sprayed onto cracked, bare ground runs into the cracks instead of being used by grass, which is the opposite of how a spray field is supposed to work.^source

The fix for both is the same: keep living grass over the field. Grass holds the soil, uses the water, and keeps the surface from baking. If the spray area goes brown and bare every August, ask your provider whether the spray pattern is reaching the whole designed area, and see our aerobic maintenance service page if you need a new provider.

Should you water the spray field in summer?

Sometimes, yes. Texas A&M AgriLife says a spray area is sized for the season with the lowest evaporation and plant water use, so in the dry months the system will not supply all the water the plants need, and you may need to water them.

That surprises people, because the spray field feels like it is already being watered every night. It is, but only with the wastewater your house makes. In a North Texas July, that can be less than the grass wants. Water lightly and deeply enough to keep grass alive, not so much that the ground stays wet into the midnight-to-5 a.m. spray window.

Two things not to do: do not move spray heads to reach a dry corner, and do not plant a vegetable garden in the spray area. AgriLife says moving heads can leave part of the required area unwatered, and state rules prohibit using the water on a vegetable garden. Our guide to aerobic spray heads covers placement and common failures.

Summer use: guests, chlorine, and the aerator

Summer also brings the heaviest use of the year: kids home, guests, holiday weekends, and long showers after yard work. An aerobic system is sized for a daily flow, so the goal is to spread the load, not cut it to nothing.

A few habits keep the classic July service call away:

• Spread laundry across the week instead of running five loads on Saturday.
• Check the chlorinator monthly. AgriLife says tablets usually need adding about once a month, and more household water means more flow past them. Use calcium hypochlorite tablets made for wastewater, never pool tablets. Our guide to the right chlorine tablets explains why.^source
• Keep grass clippings, mulch, and toys away from the aerator's air intake and off spray heads. The aerator needs a clear air intake to keep oxygen flowing to the bacteria.
• Raise the mower deck or string-trim around spray heads. Mowers are one of the most common causes of broken heads.
• Coming back from a long trip? AgriLife says the bacteria population drops while you are gone, so ease back into full water use over the first couple of days.

Fall: pumping, contracts, and the holidays

Fall is the best time for the paperwork and the pump truck. The weather is dry enough to get a truck on the lawn without rutting it, and it gets both jobs done before holiday guests arrive.

On pumping: TCEQ says a conventional septic tank should be pumped every three to five years, and its table shows a 1,000-gallon tank serving four people needs it about every 2.6 years. AgriLife puts aerobic systems at about every 2 to 3 years, usually done during a service visit. Your provider should tell you when the trash tank is due, so ask at the fall visit.

On contracts: Kaufman County wants the renewed aerobic maintenance contract on file 30 days before the current one expires, and it charges a $25 yearly renewal fee. Put the expiration date on the calendar now. If it slips, read what happens when an aerobic maintenance contract lapses.^source

Winter: freezes and power outages

Winter prep in North Texas is about two things: exposed parts that can freeze, and an aerator that stops when the power goes out. A hard freeze is rare but not unusual here, and the February 2021 storm showed how fast it goes wrong.

Before the first hard freeze, make sure you know where the system's breaker is, insulate any exposed pipes at the tanks or the pump, and keep lids and risers closed and sealed. After a freeze, check that spray heads pop up and nothing is leaking at the pump tank.

Keep water use low during a power outage, because the aerator and effluent pump are both down. When power returns, watch the alarm panel. Our septic trouble after a freeze guide covers the restart steps and the damage that shows up after the thaw.

Year-round rules no season changes

Some rules hold every month of the year, and most come straight from TCEQ's advice to septic owners:

• Do not drive or park over any part of the system, and do not build over it (driveways, sheds, patios).
• Do not add chemical additives or so-called enzymes. TCEQ advises against them.
• Do not flush wipes, cigarette butts, or trash.
• Keep the aerator plugged in and the breaker on. Turning it off to save power kills the treatment.
• Keep your aerobic maintenance contract active and keep every visit report.^source
• Check toilets for silent leaks with a few drops of dye in the toilet tank. A running toilet can overload a system in any season.

When to call someone instead of waiting

Call your maintenance provider, or a licensed repair contractor for a conventional system, when you see any of these, whatever the month: an alarm that will not clear, sewage odor in the yard that lasts more than a day, spray heads running outside the midnight-to-5 a.m. window, standing water over the field after a dry spell, or drains backing up in the house.^source

If you do not have a provider, or yours is slow to show up, our septic repair service page connects Kaufman County owners with licensed independent contractors. We do not do the work ourselves.^source