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.]