This link will explain what these chemicals are and what they do http://water.epa.gov/drink/contaminants ... oducts.cfm
VOCs were first discovered to be interfering with tests for TTHMs in Lejeune drinking water
I started this thread about the water at MCAS New River which has the MCAS TTHM warning Photograph and MCAS/TTHM information picked out From Mike Partain's timeline viewtopic.php?f=1&t=1801
The Rifle Range also had high TTHMs
While these doses do not sound very dangerous, when they are mixed with other chemicals, the effects can be synergistic and take longer to expel from the body.
This thread is a discussion of low dose chemical mixtures http://www.tftptf.com/v-web/bulletin/bb ... f=1&t=1901
This link has the current EPA standards http://www.epa.gov/enviro/html/icr/gloss_dbp.html