Trace Elements in water Benchmarks Used in Appendix Graphs

Trace Elements Used in Contaminant Exceedance Plots

in the Heinz Center Report--The State of the Nation's Ecosystems

(See below for codes and references.)


NAME		DRW*	RPTUNITS	DRWSRC*
========	===	==========	======
Arsenic		50	UG/L AS AS	MCL	
Cadmium		5	UG/L AS CD	MCL	
Chromium	100	UG/L AS CR	MCL	
Lead		15	UG/L AS PB	ACT	
Radon-222	300	PCI/L		MCL	
Selenium	50	UG/L AS SE	MCL	
Uranium		20	UG/L AS U	MCL	
Zinc		2000	UG/L AS ZN	HAL	



# ####################################################################
#
#    *  DRW:  Drinking Water Criteria:
#
#    *  DRWSRC Source Codes:   Source of data in the  DRW column:
#
#           MCL=EPA maximum contaminant level in drinking water
#
#           ACT=EPA action level in drinking water
#
#           HAL=EPA health-advisory level, lifetime,
#                 70-kg adult, assumes consumption of 2 L
#                 water per day over a 70 year lifetime
#
#
#     References:
# 
#                    USEPA, 1999a, Drinking water regulations
#                     and health advisories, Office of water,
#                     (http://www.epa.gov/OST/Tools/dwstds.html).
#
#                    USEPA, 1999b, Integrated Risk Information
#                     System (IRIS) database, Office of Research
#                     and Development, National Center for
#                     Environmental Assessment,
#                     (http://www.epa.gov/iris).


# ###################################################################