Substance EPA Maximum Contaminant Level
2,4,5-TP 0.05 mg/L
2,4-D 0.07 mg/L
Alachlor 0.002 mg/L
Arsenic (pentavalent) 0.01 mg/L
Arsenic (trivalent) 0.01 mg/L
Asbestos 7 MFL (million fibers per liter)
Atenolol None
Atrazine 0.003 mg/L
Bacteria 0 (zero)
Barium 2 mg/L
Bisphenol A None
Cadmium 0.005 mg/L
Carbamazepine None
Carbofuran 0.04 mg/L
Chloramine 4 mg/L
Chlordane 0.002 mg/L

(Note: part of TDS category)

250 mg/L
Chlorine 4 mg/L
Chromium 0.1 mg/L
Copper 1.0 mg/L
Cysts (Cryptosporidium, Giardia) 0 (zero)
Dibromochloropropane 0.0002 mg/L
Estrone None
Ethylene dibromide 0.00005 mg/L
Fluoride 4.0 mg/L
Hardness N/A
Heptachlor epoxide 0.0002 mg/L
Hydrogen sulfide N/A
Ibuprofen None
Lead 0.015 mg/L
Linuron None
Meprobamate None
Metolachlor None
Mercury (inorganic) 0.002 mg/L
Methoxychlor 0.04 mg/L
Microcystin Health Advisory Levels:

Children under 6 years old:
At or below 0.3 µg/L

Children over 6 and adults:
At or below 1.6 µg/L

MTBE (methyl tert-butyl ether) N/A
Naproxen None
Nitrates 10 mg/L
Nitrites 1 mg/L
Nonylphenol None
O-dichlorobenzene 0.6 mg/L

Note: Particulate reduction is divided into six classes:

Class I – 0.5 to < 1 micron in size
Class II – 1 to <5 microns in size
Class III – 5 to <15 microns in size
Class IV – 15 to <30 microns in size
Class V – 30 to <50 microns in size
Class VI – >50 microns in size

PCBs (polychlorinated biphenyls) 0.0005 mg/L
Perchlorates N/A
Phenytoin None
Radium 226/228 5 pCi/L
Radon 300 pCi/L (proposed)
Selenium 0.05 mg/L
(Note: part of TDS category)
(Note: part of TDS category)
250 mg/L
Styrene 0.1 mg/L
Total dissolved solids (TDS) 500 mg/L
Toxaphene 0.003 mg/L
Trichloroethylene (TCE) 0.08 mg/L
Trimethoprim None
Turbidity N/A
Volatile Organic Chemicals (VOCs) Varies
Note: Products certified for VOC reduction will reduce the following contaminants:
alachlor; atrazine; benzene; carbofuran; carbon tetrachloride; chlorobenzene; chloropicrin; 2,4-D; dibromochloropro-pane; o-dichlorobenzene; p-dichloroben-zene; 1,2-dichloroethane; 1,1-dichloro-ethylene; cis-1,2-dichloroethylene; trans-1,2-dichloroethylene; 1,2-dichloro-propane; cis-1,3-dichloropropylene; dinoseb; endrin; ethylbenzene; ethylene dibromide; haloacentonitriles; haloketones; heptachlor epoxide; hexachlorobutadiene; hexachlorocyclo-pentadiene; lindane; methoxychlor; pentachlorophenol; simazine; styrene; 1,1,2,2-tetrachloroethane; tetrachloro-ethylene; toluene; 2,4,5-TP; tribromo-acetic acid; 1,2,4-trichlorobenzene; 1,1,1-trichloroethane; 1,1,2-trichloroethane; trichloroethylene (TCE); trihalomethanes (THMs); xylenes
Xylenes 10 mg/L
Zinc 5 mg/L