Quick answer
Septic warning signs rarely fix themselves. Slow drains, gurgling, sewage odors and soggy ground over the drainfield usually mean the tank, pipes or drainfield are not handling wastewater the way they should, and the problem tends to grow. EPA warns that a malfunctioning system can contaminate groundwater and local waterways, and that a system in disrepair lowers property value. In Santa Cruz County, problems also surface at sale time: since July 1, 2023, sellers of homes with septic systems must have them professionally pumped and inspected, and needed repairs are the seller's responsibility unless the buyer and seller agree otherwise.
The warning signs
- Slow drains in several fixtures at once, not just one sink
- Gurgling in toilets or drains when water runs elsewhere
- Sewage odors indoors, near the tank or over the drainfield
- Soggy ground, ponding or surfacing wastewater over the drainfield
- Unusually green grass over the drainfield when the rest of the yard is dry
- Backups into tubs, showers or floor drains
- A high water alarm on systems with a pump
Our post on septic trouble signs explains what each one usually points to.
What happens when they are ignored
The problem spreads through the system
EPA describes how drainfields fail: as the soil layer that treats wastewater clogs, the result can be ponding in the drainfield, surfacing of untreated wastewater, and wastewater backing up into the septic tank and the plumbing in the house. A slow drain today can be a backup later.
Health risks
EPA notes that untreated wastewater contains disease-causing bacteria and viruses, and that poorly treated sewage can contaminate groundwater and spread disease in humans and animals. Contaminated surface water can also cause infections in swimmers. If your home also uses a private well, what happens in the drainfield matters for your drinking water too.
Damage to local water
Household wastewater carries high levels of nitrogen and phosphorus. EPA says malfunctioning systems release bacteria, viruses and chemicals toxic to local waterways, which can kill native plants, fish and shellfish. In Santa Cruz County that means creeks, the San Lorenzo River and Monterey Bay.
Lower property value and problems at sale
EPA warns that an unusable septic system or one in disrepair lowers property value and can create legal liability. Santa Cruz County's septic ordinance, approved in 2022 and in effect since July 1, 2023, makes this concrete:
- Sellers of homes with septic systems must have them professionally pumped and inspected.
- Sellers must give buyers a standard septic disclosure.
- Needed repairs are the seller's responsibility unless the buyer and seller agree to transfer them.
- For systems with enhanced treatment requirements, sellers must also disclose ongoing maintenance contracts and records.
A problem you ignore now is one that will show up in the point-of-sale inspection later.
What to do when you notice a sign
- Cut back on water use right away: spread out laundry, fix running toilets and shorten showers.
- Keep everyone off soggy areas and keep kids and pets away from any surfacing wastewater.
- Check the basics: is the alarm on, is a pump running, is roof water draining toward the drainfield after rain?
- Have the system inspected. An inspection finds whether the cause is a full tank, a failed baffle or pump, a blocked line or the drainfield itself. EPA recommends inspections at least every three years for typical systems and about once a year for systems with pumps or mechanical parts.
Our septic maintenance guide covers the routine care that prevents most of these problems.
Frequently asked questions
Will septic problems go away on their own?
Rarely. EPA describes drainfield problems progressing from ponding to surfacing wastewater and backups into the house. Cutting water use can buy time, but the cause needs to be found.
Is a failing septic system a health risk?
Yes. EPA says untreated wastewater contains disease-causing bacteria and viruses and can contaminate groundwater and surface water.
Do I need a septic inspection to sell a house in Santa Cruz County?
Yes. Since July 1, 2023, sellers of homes with septic systems must have them professionally pumped and inspected and provide a standard disclosure to buyers.
Who pays for septic repairs found during a sale?
Under the county ordinance, needed repairs are the seller's responsibility unless the buyer and seller agree to transfer them to the buyer.
How is septic troubleshooting priced?
Flat rate, quoted on site before work begins.
Sources
- U.S. EPA, Why Maintain Your Septic System
- U.S. EPA, How to Care for Your Septic System
- County of Santa Cruz, Board Approves Septic Ordinance Changes (October 26, 2022)
Need help with septic warning signs?
Wade's Plumbing & Septic provides septic troubleshooting, inspections and repair across Santa Cruz County and nearby Santa Clara County communities. Quotes are free and pricing is flat rate, quoted on site before work begins. Request service or call during office hours, Monday to Friday, 9:00 AM to 5:00 PM.
