Septic System Additives, are they good or a hoax? Wenatchee Home Inspection

Ah, another great debate on what to do if you are on a septic system. The question- Should you be adding additives?

Well I thought I would take a little journey into this and see what I can find out.

What I know for sure is that no additive will compensate for poor design, abuse of the system and proper maintenance. Even well-designed septic systems can have a finite life.

Sanford Mersky a septic system engineer says “Biological additives are mostly benign, but unnecessary”.

       
Something I found during my research is that Washington State law allows the use of certain additives. These additives contain ingredients that are unlikely to harm septic systems, groundwater, and human health.  The Washington State Department of Health regularly updates a list of approved additives.

In 1993, the Washington State Legislature found that most additives do not have a positive effect on the operation of on-site systems, and can contaminate groundwater aquifers, render septic drainfields dysfunctional, and result in costly repairs to homeowners.

Here is the kicker… It is against the law in Washington to use, sell, or distribute additives that have not been reviewed and are not specifically on the list!

Here is the current list-  http://www.doh.wa.gov/Portals/1/Documents/Pubs/337-025.pdf
Turns out Massachusetts also has a list too-MassDEP

Here is another good link-
http://clark.wsu.edu/horticulture/smallAcreageProgram/septic-additives.pdf

So in conclusion what I have found is this- the additives have little benefit to the system. That you should use and maintain the system as designed. In some areas due to local environmental conditions your system may only last 20 years no matter how well you maintain the system. Check with your local health department for the best places to start looking for resources and information.
 

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NCW Home Inspections, LLC  is a Licensed Washington State Home Inspection service located in Wenatchee Washington serving Chelan County, Douglas County, Kittitas County, Okanogan County and Grant County Washington and the cities of Wenatchee, Leavenworth, Cashmere, Oroville, Cle Elum, East Wenatchee, Quincy and many more…  

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