By the way...

Kodak Publication J-300 - "Environmental Guidelines for Amateur Photographers."
http://www.kodak.com/global/en/corp/.../pdfs/j300.pdf

Summary:
Developers and wash agents may be discharged to municipal sewer systems in moderate quantities without fear of harm.
Acid stop baths may be discharged if neutralized with sodium bicarbonate (baking soda) first.
Fixers may be discharged AFTER silver has been removed.
Exotics such as Selenium should NOT be discharged.

I take the extra step of turning in my spent fixer after desilvering but I don't neutralize stop bath so, according to Kodak's recommendation, I guess I'm about on par or a little above.

[Runs to the kitchen to find the baking soda.]