How to Protect Your Septic System During Summer and Dry Spells Near Olympia
When summer arrives in Western Washington, the heavy rains stop, the days get longer, and the backyard barbecues begin. For most homeowners, summer is the easiest time of year to manage property maintenance. But for your septic system, the summer months can bring a unique set of hidden stresses.
While winter rains can saturate a drain field from the outside, summer activities often overwhelm a septic system from the inside. Increased water use, visiting guests, and dry-weather landscaping habits can all push an aging or neglected system to the breaking point. If you rely on a septic system in Thurston, Pierce, or Mason County, here is what you need to know to protect your system during the busy summer season.
The threat of high water use
The average indoor water use in a typical single-family home can be as much as 70 gallons per individual, per day.1 All the water a household sends down its pipes ends up in its septic system.1 During the summer, that volume often spikes.
Kids are home from school, leading to more showers and toilet flushes. Summer sports and outdoor activities mean extra loads of laundry. If you host a weekend barbecue or have family staying in a guest room, the sudden surge of wastewater entering the tank can disrupt the natural treatment process.
When too much water enters the septic tank at once, it stirs up the settled sludge at the bottom and the floating scum at the top. If the water flows through the tank too quickly, those solid wastes do not have time to separate. Instead, they are pushed out into the drain field, where they can clog the pipes and ruin the soil's ability to absorb water.
How to protect your system: * Spread out laundry: Doing all household laundry in one day might seem like a time-saver, but it can harm your septic system by flooding the drain field.1 Spread washing machine use throughout the week. * Fix leaks immediately: Just a single leaky or running toilet can add as much as 200 gallons of water per day to your system.1 * Stagger showers: If you have guests staying over, encourage shorter showers and try to space them out rather than having everyone shower back-to-back.
Educating summer guests
Your septic system contains a collection of living organisms that digest and treat household waste.1 Because you live with the system every day, you likely know the rules: no grease down the drain, no harsh chemicals, and nothing flushed except human waste and toilet paper.
However, summer guests who are used to living on a city sewer system may not know these rules. They might flush items that a septic system cannot handle, or they might rely heavily on the kitchen garbage disposal while helping clean up after a meal.
Using an in-sink garbage disposal unit can impact how often you need to pump your septic tank.1 Food waste adds an unnecessary amount of solid material to the tank, which can push solids into the drain field and cause pipes to clog.1
How to protect your system: * Think at the sink: Eliminate or limit the use of a garbage disposal.1 Scrape plates directly into the trash or compost bin before washing them. * Toilets are not trash cans: Remind guests that only human waste and toilet paper should be flushed. Never flush wipes (even those labeled "flushable"), feminine hygiene products, diapers, or paper towels.1 * Provide a trash can: Make sure there is a visible, easily accessible trash can in every bathroom so guests are not tempted to flush inappropriate items.
Dry weather and drain field landscaping
While summer in the South Sound is beautiful, the lack of rain can cause lawns to turn brown. Many homeowners respond by running sprinklers constantly. If your drain field is located under your lawn, this can be a problem.
The soil below the drain field provides the final treatment and disposal of the septic tank effluent.2 These processes work best where the soil is somewhat dry, permeable, and contains plenty of oxygen.2 If you constantly run an irrigation system over the drain field, you saturate the soil from above, leaving no room for the wastewater to absorb from below.
Furthermore, summer is prime time for landscaping projects. It is critical to remember that you should not plant trees, shrubs, or vegetable gardens over a drain field.1 Tree and shrub roots can ensnarl and damage drain field pipes, and vegetables can potentially be exposed to sewage effluent.1
How to protect your system: * Don't irrigate the drain field: Do not install an irrigation system in the drain field, and ensure that nearby sprinklers do not drain toward it.2 * Keep heavy equipment off: If you are having landscaping materials delivered or a new deck built, do not allow trucks, cars, or heavy equipment to drive or park on the drain field.1 The weight compacts the soil and can crack the pipes.2 * Plant only grass: Plant only grass or shallow-rooted native ground covers over the drain field to prevent soil erosion without risking root damage.1
| Summer Septic Risk | Why It Causes Problems | How to Prevent It |
|---|---|---|
| Marathon laundry days | Floods the tank and pushes solids into the drain field.1 | Spread loads of laundry throughout the week.1 |
| Garbage disposal use | Adds excessive solid waste that clogs the system.1 | Scrape food waste into the trash; limit disposal use.1 |
| Flushing wipes/trash | Non-flushable items do not decompose and cause backups.1 | Provide trash cans in guest bathrooms. |
| Irrigating the drain field | Saturates the soil, preventing wastewater absorption.2 | Do not water the lawn over the drain field area.2 |
| Parking on the lawn | Heavy vehicles compact soil and crush drain field pipes.1 | Keep all cars and equipment off the drain field.2 |
Start the summer with an inspection
The average household septic system should be inspected at least every three years by a septic service professional, and tanks are typically pumped every three to five years.1 If you are planning to host large gatherings this summer, or if you cannot remember the last time your tank was pumped, early summer is the perfect time to schedule an inspection.
Having the tank pumped before the heavy-use season begins gives you peace of mind and provides extra capacity to handle the increased wastewater from guests and summer activities.
South Bay Septic and Excavation LLC provides professional septic system inspections, pumping, repairs, and installations for homeowners in Thurston, Mason, Pierce, and Lewis Counties. If your system is showing signs of stress—such as slow drains, gurgling pipes, or soggy spots in the yard—do not wait for a full backup.
Contact South Bay Septic and Excavation LLC at 360-233-2783 today to schedule your summer septic inspection and keep your system running smoothly all season long.
