Academy/Maintenance Fundamentals
Sewer systems
Two very different systems share the name "sewer," and only one of them is on your maintenance calendar.
Sewer systems fall into two types: connection to a municipal sanitary sewer, or an onsite septic system the association maintains directly. For septic systems, EPA recommends inspecting the tank every 1 to 3 years and pumping it every 3 to 5 years, on separate schedules, to keep solids from migrating into the drainfield.
Two systems, two very different obligations
A "sewer system" in an HOA context means one of two things. Some communities connect every building to a municipal sanitary sewer main, in which case a public utility maintains the main line and the association's obligation typically stops at some point closer to the building. Other communities, especially rural or low-density ones, run on one or more onsite septic systems that the association is responsible for maintaining directly, tank, drainfield, and all.
Exactly where the association's responsibility ends and the utility's begins, for a municipally connected community, is set by your CC&Rs and by the local utility's own rules. Check both before assuming who pays for a line repair.
A septic tank runs on two separate clocks
If your community has a septic system, treat inspection and pumping as two different tasks on two different timelines, not one task done twice as often.
"A septic tank should be inspected every 1 to 3 years and pumped every 3 to 5 years."
Source: Why Maintain Your Septic System, U.S. Environmental Protection Agency
A system with mechanical parts, a pump or a float switch instead of plain gravity flow, needs inspection more often than that, roughly once a year, because those parts fail differently than a passive tank does.
What skipping pumping actually costs
A tank that goes past its pumping interval fills with solids. Those solids do not stay put: EPA warns they slowly migrate toward the drainfield, the buried piping that lets treated wastewater soak back into the soil, and can clog it. A clogged drainfield is a much bigger repair than a missed pumping, sometimes the entire drainfield has to be replaced. Skipping one scheduled pumping is a budget decision. Letting it slide for years is a decision to eventually replace the whole system.
Check yourself
Answer before you read the explanation, recalling it is what makes it stick.
Your community's septic tank was pumped last year. The treasurer says that means the inspection can be skipped this year too. What's wrong with that reasoning?
A septic tank goes years without pumping and fills with solids. What does EPA warn happens next?
Compared to a standard gravity septic system, how often should a system with a pump and float switch be inspected?
Sources
- Why Maintain Your Septic System, U.S. Environmental Protection Agency
Maintenance Fundamentals
Next, see how a missed sewer inspection fits into your association's broader maintenance program in Deferred maintenance.
Whether your community is on municipal sewer or septic, and who is responsible for the line connecting a building to the main, varies by association and by local utility rules. Septic inspection and pumping intervals can also shift based on tank size, household count, and local health department requirements.