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Re: cooling tower blowdown discharges to septic?
Linda - I didn't see any replies to your inquiry so here goes.
Here in the US ANY industrial waste water is generally prohibited
to be discharged into a septic system. ONLY sanitary waste
waters. The local health departments regulate this.
I once tried to work with a county health department to discharge
compressor condensate that had been run through an oil water
separator. The treated water was tested and showed negligible (ppm)
remaining oil. They still would not permit the water to be
discharged. However, they did help by linking me to an area POTW so
that the company could haul the water over to their location (in 55-gal
drums) so the generating facility could eliminate paying a waste disposal
company to pick the water up.
In terms of the cooling waters it may contain have bacteriacides and/or
fungicides added particularly if it is recirculated.
I hope this helps!
At 12:05 PM 11/1/2005, you wrote:
I have been trying to help a facility address an issue related to
discharge of cooling tower blowdown, where their water source is softened
groundwater, and have been informed that the regulators do not look
kindly to discharge to septic. Has anybody had any experience with
discharge of cooling tower blowdown to septic, and if so, what were the
chemicals used in the cooling tower, and were there any concerns about
impact on conditions in the septic tank and leaching fields?
Thanks for any help!
Linda Varangu, M.Eng.
Canadian Centre for Pollution Prevention
519 623 8037
Great Lakes Regional Pollution Prevention Roundtable (GLRPPR)
A proud member of the P2Rx network of
c/o WMRC - IDNR
1010 Jorie Blvd, Suite 12
Oakbrook, IL 60523