Complete Water Contaminants Database
Comprehensive information on 609 drinking water contaminants across 23 categories. Learn about health effects, EPA MCLG Levels, and NSF-certified filter solutions.
Strictest EPA Limits
41 contaminants where EPA's health goal is zero or below 1 ppb, or that affect critical organs
Strict Limits
32 contaminants with an EPA limit below 50 ppb equivalent
NSF-Certified Solutions
Every contaminant can be removed with NSF-certified water filters
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1,2 Dichloroethane
VOCs
1,2 Dichloropropane
VOCs
2,3,7,8-TCDD
Dioxins/Furans
Alachlor
Herbicides
Arsenic
Metals
Benzene
Petroleum Compounds
Benzo(a)pyrene
Petroleum Compounds
Bis(2-ethylhexyl) phthalate
Plasticizers
Bromate
Disinfection Byproducts
Bromate forms when ozone disinfection reacts with naturally occurring bromide in source water. The EPA limits bromate to 10 ppb (0.010 mg/L), with a health goal (MCLG) of zero.
Bromodichloromethane
Disinfection Byproducts
Bromodichloromethane (BDCM) is one of the four trihalomethanes regulated as part of TTHM (limit 80 ppb). It forms when source water contains bromide. Its EPA health goal (MCLG) is zero.
Bromoform
Disinfection Byproducts
Bromoform is the fully brominated trihalomethane, regulated as part of TTHM (limit 80 ppb) and most common where source water is high in bromide. Its EPA health goal (MCLG) is zero.
Carbon Tetrachloride
VOCs
Chlordane (mixture of isomers)
Pesticides
Cryptosporidium
Protozoa
Dibromochloropropane
VOCs
Dichloroacetic Acid (DCA)
Disinfection Byproducts
Dichloroacetic acid is one of the five haloacetic acids in HAA5 (group limit 60 ppb). Its EPA health goal (MCLG) is zero.
Dichloromethane
VOCs
Epichlorohydrin
VOCs
Ethylene dibromide
VOCs
GenX
PFAS
Giardia
Protozoa
Heptachlor
Pesticides
Heptachlor epoxide
Pesticides
Hexachlorobenzene
Pesticides
Lead
Metals
Legionella pneumophila
Bacteria
Legionella pneumophila is a bacterium that can cause a severe form of pneumonia known as Legionnaires' disease. It is a gram-negative bacterium that thrives in warm water environments and can be found in natural water bodies as well as man-made water systems.
Lindane
Pesticides
Pentachlorophenol
SVOCs
Perfluorohexanesulfonic acid
PFAS
Perfluorononanoic acid
PFAS
Perfluorooctanesulfonic acid
PFAS
Perfluorooctanoic acid
PFAS
Polychlorinated Biphenyls
Flame Retardants
Tetrachloroethylene
VOCs
Thallium
Metals
Total Coliform
Bacteria
Total Coliforms
Bacteria
Total coliforms are a group of bacteria found in the environment, including in soil, vegetation, and feces of warm-blooded animals. They are used as an indicator of water quality and the potential presence of harmful pathogens.
Toxaphene
Pesticides
Trichloroethylene
VOCs
Uranium
Metals
Vinyl Chloride
VOCs
1,1 Dichloroacetone
Disinfection Byproducts
1,1-Dichloroacetone is a halogenated ketone, a minor and unregulated byproduct of chlorinating water that contains organic matter.
1,1 Dichloroethylene
VOCs
1,1,2 Trichloroethane
VOCs
Antimony
Metals
Asbestos
Minerals
Atrazine
Herbicides
Beryllium
Metals
Bromochloroacetic acid
Disinfection Byproducts
Bromochloroacetic acid is a brominated haloacetic acid reported within the HAA9 monitoring group. It is not individually regulated by the EPA.
Bromochloromethane
Disinfection Byproducts
Bromochloromethane is a halomethane sometimes detected in chlorinated or brominated water. It is not regulated by the EPA as a drinking-water disinfection byproduct.
Bromodichloroacetic acid
Disinfection Byproducts
Bromodichloroacetic acid is a brominated haloacetic acid reported within the HAA9 monitoring group. It is not individually regulated by the EPA.
Cadmium
Metals
Carbofuran
Pesticides
Chlorate
Disinfection Byproducts
Chlorate forms mainly as a byproduct of chlorine dioxide and aged hypochlorite disinfectant. It is on the EPA's monitoring list but is not currently regulated in drinking water with a federal limit.
Chlorodibromoacetic acid
Disinfection Byproducts
Chlorodibromoacetic acid is a brominated haloacetic acid reported within the HAA9 monitoring group. It is not individually regulated by the EPA.
Dibromoacetic Acid (DBA)
Disinfection Byproducts
Dibromoacetic acid is a brominated member of the HAA5 group (group limit 60 ppb); the EPA has not set an individual health goal for it.
Dibromomethane
Disinfection Byproducts
Dibromomethane (methylene bromide) is a brominated halomethane occasionally detected in water high in bromide. It is not regulated by the EPA as a drinking-water disinfection byproduct.
Dichloroacetonitrile
Disinfection Byproducts
Dichloroacetonitrile is a haloacetonitrile, a nitrogen-containing byproduct formed during chlorination and chloramination. It is unregulated but is among the byproducts the NSF/ANSI 53 VOC claim is tested against.
Dinoseb
Herbicides
Diquat
Herbicides
Endrin
Pesticides
Gross Alpha Activity
Radionuclides
Gross Beta Activity
Radionuclides
HAA6Br
Disinfection Byproducts
HAA6Br is the sum of the six brominated haloacetic acids. It is a monitoring group used to track brominated byproducts in source water high in bromide, not a separately enforced limit.
HAA9
Disinfection Byproducts
HAA9 is the sum of nine haloacetic acids (the five in HAA5 plus four additional brominated species). It is a monitoring group used to characterize brominated byproducts, not a separately enforced limit.
Mercury
Metals
Methoxychlor
Pesticides
Monobromoacetic Acid (MBA)
Disinfection Byproducts
Monobromoacetic acid is a brominated member of the HAA5 group (group limit 60 ppb); the EPA has not set an individual health goal for it.
n Nitrosodimethylamine
Disinfection Byproducts
N-Nitrosodimethylamine (NDMA) is a nitrogen-containing byproduct formed mainly during chloramine disinfection. It is unregulated federally but is on the EPA's contaminant candidate list and is the byproduct most often cited in the chlorine-to-chloramine 'regrettable substitution'.
Radium, combined (-226 & -228)
Radionuclides
Simazine
Herbicides
Tribromoacetic Acid
Disinfection Byproducts
Tribromoacetic acid is a fully brominated haloacetic acid reported within the HAA9 monitoring group. It is not individually regulated by the EPA.
Trichloroacetic Acid (TCA)
Disinfection Byproducts
Trichloroacetic acid is one of the five haloacetic acids in HAA5 (group limit 60 ppb). Its EPA health goal (MCLG) is 0.02 mg/L.
1,1,1 Trichloroethane
VOCs
1,2,4 Trichlorobenzene
VOCs
1,4 Dichlorobenzene
VOCs
2,4-D
Herbicides
Bis(2-ethylhexyl) adipate
Plasticizers
Chlorobenzene
VOCs
Chloroform
Disinfection Byproducts
Chloroform is the most common trihalomethane and the surrogate the NSF/ANSI 53 VOC test uses for the family. It is regulated as part of total trihalomethanes (TTHM limit 80 ppb). Its EPA health goal (MCLG) is 0.07 mg/L.
Chromium (Total)
Metals
cis 1,2 Dichloroethylene
VOCs
Cyanide
Inorganics
Dalapon
Herbicides
Dibromochloromethane
Disinfection Byproducts
Dibromochloromethane (DBCM) is one of the four trihalomethanes regulated as part of TTHM (limit 80 ppb), favored when source water contains bromide. Its EPA health goal (MCLG) is 0.06 mg/L.
Endothall
Herbicides
Free Cyanide
Inorganics
Hexachlorocyclopentadiene
SVOCs
Iron
Metals
Manganese
Metals
Monochloroacetic Acid
Disinfection Byproducts
Monochloroacetic acid is one of the five haloacetic acids in HAA5 (group limit 60 ppb). Its EPA health goal (MCLG) is 0.07 mg/L.
Oxamyl
Pesticides
Selenium
Metals
Silver
Metals
Silvex
Herbicides
Styrene
VOCs
Total Haloacetic Acids (HAA5)
Disinfection Byproducts
HAA5 is the sum of five haloacetic acids formed when chlorine reacts with organic matter. Unlike trihalomethanes they are non-volatile, so they are an ingestion concern rather than a shower concern. The EPA limits HAA5 to 60 ppb (0.060 mg/L).
Total THMs
Disinfection Byproducts
Total trihalomethanes (TTHM) are the sum of four byproducts — chloroform, bromodichloromethane, dibromochloromethane, and bromoform — formed when chlorine reacts with organic matter. The EPA limits TTHM to 80 ppb (0.080 mg/L).
Total Trihalomethanes (TTHMs)
Disinfection Byproducts
TTHM is the sum of four trihalomethanes — chloroform, bromodichloromethane, dibromochloromethane and bromoform — formed when chlorine reacts with organic matter. Unlike the haloacetic acids they are volatile, so they are an inhalation concern in the shower as well as an ingestion concern. The EPA limits TTHM to 80 ppb (0.080 mg/L), measured as a running annual average for the water system rather than as a single-sample ceiling, so an individual reading above 80 ppb is not by itself a violation.
trans 1,2 Dichloroethylene
VOCs
1 Butanol
VOCs
1 Chlorobutane
VOCs
1-Methylnaphthalene
Petroleum Compounds
1-Naphthol
Organics
1,1 Dichloroethane
VOCs
1,1 Dichloropropene
VOCs
1,1,1-Trichloro-2-propanone
1,1,1,2 Tetrachloroethane
VOCs
1,1,2,2 Tetrachloroethane
VOCs
1,2 Dibromoethylene
1,2 Dichlorobenzene
VOCs
1,2-Diphenylhydrazine
SVOCs
1,2,3 Trichlorobenzene
VOCs
1,2,3 Trichloropropane
VOCs
1,2,3-Trimethylbenzene
VOCs
1,2,4 Trimethylbenzene
VOCs
1,3 Butadiene
VOCs
1,3 Dichlorobenzene
VOCs
1,3 Dichloropropane
VOCs
1,3 Dichloropropene
Pesticides
1,3-Dinitrobenzene
SVOCs
1,3,5 Trichlorobenzene
VOCs
1,3,5 Trimethylbenzene
VOCs
1,4 Dioxane
VOCs
11-Chloroeicosafluoro-3-oxaundecane-1-sulfonic acid
PFAS
17 alpha ethynyl estradiol
Steroids/Hormones
17 beta estradiol
Steroids/Hormones
2 Hexanone
VOCs
2 Methoxyethanol
Organics
2 Nitropropane
VOCs
2 Propen 1 ol
VOCs
2-Chlorobiphenyl
Flame Retardants
2-Chloroethyl vinyl ether
VOCs
2-Chloronaphthalene
SVOCs
2-Chlorophenol
SVOCs
2-Methyl-4,6-dinitrophenol
Pesticides
2-Methylnaphthalene
Petroleum Compounds
2-Nitrophenol
SVOCs
2,2 Dichloropropane
VOCs
2,2',3,3',4,4',6-Heptachlorobiphenyl
2,2',3,3',4,5',6,6'-Octachlorobiphenyl
Flame Retardants
2,2',3',4,6-Pentachlorobiphenyl
Flame Retardants
2,2',4,4'-Tetrachlorobiphenyl
Flame Retardants
2,2',4,4',5',6-Hexachlorobiphenyl
2,3-Dichlorobiphenyl
Flame Retardants
2,4-DB
Herbicides
2,4-Dichlorophenol
Organics
2,4-Dimethylphenol
SVOCs
2,4-Dinitrophenol
SVOCs
2,4-Dinitrotoluene
SVOCs
2,4,5-T
Herbicides
2,4,5-Trichlorobiphenyl
Flame Retardants
2,4,5-Trichlorophenol
Pesticides
2,4,6 Trinitrotoluene
VOCs
2,4,6-Trichlorophenol
Pesticides
2,6-Dinitrotoluene
SVOCs
3,3 Dichlorobenzidine
SVOCs
3,5-Dichlorobenzoic Acid
Organics
4 Methyl 2 Pentanone
VOCs
4-Bromophenyl phenyl ether
SVOCs
4-Chloro-3-methylphenol
Pharma & Personal Care
4-Chlorophenylphenyl ether
SVOCs
4-Nitrophenol
SVOCs
4,4 DDD
Pesticides
4,4 DDE
Pesticides
4,4 DDT
Pesticides
4,8-dioxa-3H-perfluorononanoic acid
PFAS
5-Hydroxydicamba
6:2 Fluorotelomer sulfonic acid
PFAS
9-Chlorohexadecafluoro-3-oxanonane-1-sulfonic acid
PFAS
Acenaphthene
Petroleum Compounds
Acenaphthylene
Petroleum Compounds
Acetaminophen
Pharma & Personal Care
Acetochlor
Herbicides
Acetochlor ethanesulfonic acid
Herbicides
Acetochlor oxanilic acid
Herbicides
Acetone
VOCs
Acetophenone
SVOCs
Acidity
Properties
Acifluorfen
Herbicides
Acremonium
Fungi
Acremonium is a genus of filamentous fungi belonging to the family Hypocreaceae. Acremonium species occur naturally in the environment in areas with lots of moisture and places containing decaying organic matter, as well as in indoor environments with excessive moisture from things like water damage. Acremonium colonies grow slowly and turn from moist to powdery as they age. Colonies may appear white, gray, or pinkish in color. Acremonium species have been detected in groundwater, surface water, and treated drinking water. Certain fungi may collect and proliferate in biofilms throughout drinking water distribution systems, though there is limited evidence regarding Acremonium species in biofilms.
Acrolein
VOCs
Acrylonitrile
VOCs
Adipate
Plasticizers
Alachlor ethanesulfonic acid (ESA)
Herbicides
Alachlor oxanilic acid (OA)
Herbicides
Aldicarb
Pesticides
Aldicarb sulfone
Pesticides
Aldicarb sulfoxide
Pesticides
Aldrin
Pesticides
Alkalinity (as CaCO3)
Properties
Allyl Chloride
VOCs
Alpha Chlordane
Pesticides
alpha-BHC
Pesticides
Alternaria
Fungi
Alternaria is a genus of fungi that is commonly found in soil, air, and decaying plant material. It is known for its ability to produce allergens and mycotoxins, which can contaminate food and water supplies.
Aluminum
Metals
Ametryn
Herbicides
Ammonia
Inorganics
Ammonia (as N)
Inorganics
Amoxicillin
Pharma & Personal Care
Anatoxin-a
Toxins
Androstenedione
Steroids/Hormones
Androsterone
Steroids/Hormones
Anthracene
Petroleum Compounds
Aspergillus flavus
Fungi
Aspergillus flavus is a species of fungus that can produce aflatoxins, which are toxic compounds that can contaminate food and feed. It is commonly found in soil, decaying vegetation, and stored grains.
Aspergillus fumigatus
Fungi
Aspergillus fumigatus is a species of fungus that is commonly found in the environment, particularly in soil and decaying organic matter. It is known for its ability to thrive in various conditions, including those that are nutrient-poor. This fungus can produce spores that are easily airborne, making it a common allergen and potential pathogen in humans.
Aspergillus nidulans
Fungi
Aspergillus nidulans is a species of fungus that is commonly found in soil and decaying organic matter. It is a filamentous fungus that can produce a variety of secondary metabolites, some of which may have toxic properties. This organism is known for its ability to thrive in various environmental conditions and can be a contaminant in food and water supplies.
Aspergillus niger
Fungi
Aspergillus niger is a species of fungus that is commonly found in soil and decaying plant matter. It is known for its ability to produce a variety of enzymes and organic acids, which can be beneficial in industrial applications, such as food processing and biotechnology. However, it can also be a contaminant in drinking water, particularly in areas with poor sanitation or agricultural runoff.
Aspergillus ochraceus
Fungi
Aspergillus ochraceus is a species of fungus that is commonly found in soil, decaying vegetation, and various food products. It is known for producing ochratoxin A, a mycotoxin that can contaminate food and water supplies. This fungus thrives in warm and humid environments and can grow on a variety of substrates, including grains, nuts, and dried fruits.
Aspergillus species
Fungi
Aspergillus species are a group of fungi that are commonly found in various environments, including soil, decaying vegetation, and indoor environments. They are known for their ability to produce a variety of secondary metabolites, some of which can be toxic to humans and animals. Aspergillus species can thrive in a wide range of conditions and are often associated with food spoilage and contamination.
Aspergillus versicolor
Fungi
Aspergillus versicolor is a species of fungus that is commonly found in indoor environments, particularly in damp or water-damaged buildings. It is known for its ability to grow on a variety of substrates, including wood, paper, and textiles. This mold can produce mycotoxins, which are toxic compounds that can pose health risks to humans.
Atraton
Herbicides
Aureobasidium
Fungi
Aureobasidium is a genus of fungi that is commonly found in soil, on plants, and in indoor environments. It is known for its ability to thrive in various conditions, including high humidity and low light. Aureobasidium species can produce dark pigmented spores and are often associated with the decay of organic matter.
Azinphos-ethyl
Pesticides
Azinphos-methyl
SVOCs
Azobenzene
Organics
Barban
SVOCs
Barium
Metals
Basidiomycetes
Fungi
Basidiomycetes are a group of fungi that include mushrooms, puffballs, and shelf fungi. They are characterized by their reproductive structures called basidia, which produce spores. These fungi play a crucial role in the ecosystem as decomposers, breaking down organic matter and recycling nutrients back into the soil.
Benefin
Pesticides
Bentazon
Herbicides
Benzaldehyde
SVOCs
Benzidine
SVOCs
Benzo(a)anthracene
Petroleum Compounds
Benzo(b)fluoranthene
Petroleum Compounds
Benzo(g,h,i)perylene
Petroleum Compounds
Benzo(k)fluoranthene
Petroleum Compounds
Benzoic acid
SVOCs
Benzyl alcohol
SVOCs
Benzyl butyl phthalate
Plasticizers
Beta Chlordane
Pesticides
beta-BHC
Pesticides
Biochemical Oxygen Demand
Properties
Bipolaris & Drechslera
Fungi
Bipolaris drechslera is a fungal pathogen that can contaminate water sources, particularly in agricultural areas. It is known for causing diseases in plants, particularly in crops such as barley and wheat. The fungus thrives in warm, moist environments and can produce spores that are easily dispersed by wind or water.
bis(2-Chloroethoxy)methane
SVOCs
bis(2-Chloroethyl) ether
SVOCs
bis(2-Chloroisopropyl) ether
Organics
Bismuth
Metals
Bisphenol A
Plasticizers
Boron
Inorganics
Botrytis
Fungi
Botrytis is a genus of fungi that includes several species known for causing plant diseases, particularly in grapes and other fruits. It can thrive in moist conditions and is often associated with the decay of plant material.
Bromacil
Herbicides
Bromide
Inorganics
Bromobenzene
VOCs
Bromochloroacetonitrile
Bromomethane
VOCs
Butachlor
Herbicides
Butanal
VOCs
Butane, 2-ethoxy-2-methyl-
Butylate
Pesticides
Butylated hydroxyanisole
Organics
Caffeine
Pharma & Personal Care
Calcium
Minerals
Carbamazepine
Pharma & Personal Care
Carbaryl
Pesticides
Carbon
Inorganics
Carbon Disulfide
VOCs
Carbophenothion
Pesticides
Cerium
Metals
Cesium-134
Radionuclides
Cesium-137
Radionuclides
Chaetomium
Fungi
Chaetomium is a genus of fungi that is commonly found in soil and decaying plant material. It is known for its ability to degrade cellulose and is often associated with water-damaged buildings. The spores of Chaetomium can be airborne and may contribute to indoor air quality issues.
Chemical Oxygen Demand
Properties
Chloral hydrate
VOCs
Chloramben
Herbicides
Chloramine
Disinfectants
Chloride
Inorganics
Chlorine (Free)
Disinfectants
Chlorine (Total)
Disinfectants
Chlorine Dioxide
Disinfectants
Chlorite
Disinfection Byproducts
Chlorite forms when water is disinfected with chlorine dioxide. The EPA limits chlorite to 1.0 mg/L, with a health goal (MCLG) of 0.8 mg/L.
Chloroacetonitrile
VOCs
Chlorobenzilate
Pesticides
Chlorodifluoromethane
Organics
Chloroethane
VOCs
Chloromethane
VOCs
Chloroneb
Pesticides
Chlorothalonil
Pesticides
Chlorotoluene
VOCs
Chlorotoluene 2
VOCs
Chlorotoluene 4
VOCs
Chlorpropham
Herbicides
Chlorpyrifos
Pesticides
Chromium (VI)
Metals
Chrysene
Petroleum Compounds
cis 1,3 Dichloropropene
VOCs
cis Permethrin
Pesticides
Cladosporium
Fungi
Cladosporium is a genus of fungi that is commonly found in indoor and outdoor environments. It thrives in damp conditions and can often be found on decaying organic matter, such as wood, leaves, and soil. Cladosporium species are known for their dark green or black appearance and can produce spores that are easily airborne.
CO2 (Free)
Inorganics
Cobalt
Metals
Coliform (fecal)
Bacteria
Color
Properties
Conductivity
Properties
Copper
Metals
Coumaphos
Pesticides
Crotoxyphos
SVOCs
Curvularia
Fungi
Curvularia is a genus of fungi that can be found in soil and decaying plant material. It is known for its ability to thrive in various environmental conditions and can produce mycotoxins that may contaminate water sources.
Cyanazine
Herbicides
Cycloate
Herbicides
Cyclohexanone
Organics
Cylindrospermopsin
Toxins
Dacthal
Herbicides
DCPA acid metabolites
Herbicides
Decanal
VOCs
DEET
Pesticides
delta-BHC
Pesticides
Desethylatrazine
Herbicides
Desisopropylatrazine
Herbicides
Di-n-butyl phthalate
Plasticizers
Di-n-octyl phthalate
Plasticizers
Diazinon
Pesticides
Dibenzo(a,h)anthracene
Petroleum Compounds
Dibenzofuran
SVOCs
Dibromoacetonitrile
Dicamba
Herbicides
Dichlobenil
Pesticides
Dichloran
Pesticides
Dichlorodifluoromethane
VOCs
Dichlorofluoromethane
VOCs
Dichlorprop
Herbicides
Dichlorvos
Pesticides
Dieldrin
Pesticides
Diethyl ether
VOCs
Diethyl phthalate
Plasticizers
Diiodomethane
Diisobutyl phthalate
Plasticizers
Diisopropyl ether
VOCs
Dimethipin
Herbicides
Dimethoate
Pesticides
Dimethyl phthalate
Plasticizers
Dioxathion
Diphenamid
Herbicides
Dissolved Organic Carbon
Properties
Dissolved Oxygen
Properties
Disulfoton
Pesticides
E. coli
Bacteria
Endosulfan I
Pesticides
Endosulfan II
Pesticides
Endosulfan Sulfate
Pesticides
Endrin Aldehyde
Pesticides
Enterococcus
Bacteria
Enterococcus faecalis
Bacteria
Enterococcus faecalis is a type of bacteria that is commonly found in the intestines of humans and animals. It is a gram-positive, facultative anaerobic bacterium that can survive in harsh environmental conditions. While it is a normal part of the gut flora, its presence in water indicates fecal contamination.
Epicoccum species
Fungi
Epicoccum species are a group of fungi that are commonly found in soil and decaying organic matter. They are known for their ability to produce a variety of secondary metabolites, some of which may have antimicrobial properties. These fungi can be found in various environments, including agricultural fields and forests, and are often associated with plant material.
EPN
Pesticides
EPTC
Herbicides
Estriol
Steroids/Hormones
Estrone
Steroids/Hormones
Ethion
Pesticides
Ethoprop
Pesticides
Ethyl acetate
VOCs
Ethyl Methacrylate
VOCs
Ethyl parathion
Pesticides
Ethyl Tertiary Butyl Ether
Petroleum Compounds
Ethylbenzene
Petroleum Compounds
Ethylene glycol
Organics
Etridiazole
Pesticides
Exophiala
Fungi
Exophiala is a genus of fungi that can be found in various environments, including soil and decaying organic matter. It is known for its dark pigmentation and can sometimes be associated with human infections, particularly in immunocompromised individuals.
Fenamiphos
Pesticides
Fensulfothion
Pesticides
Fenthion
Pesticides
Fenuron
Pesticides
Fluchloralin
Herbicides
Fluometuron
Pesticides
Fluoranthene
Petroleum Compounds
Fluorene
Petroleum Compounds
Fluoride
Inorganics
Fonofos
Pesticides
Formaldehyde
VOCs
Fusarium
Fungi
Fusarium is a genus of filamentous fungi that are commonly found in soil and plant debris. They can produce mycotoxins that are harmful to humans and animals. Fusarium species are known to cause plant diseases and can contaminate crops, leading to food safety concerns.
gamma-Chlordane
Pesticides
Gemfibrozil
Pharma & Personal Care
Germanium
Metals
Glyoxal
Pharma & Personal Care
Glyphosate
Herbicides
Grains per gallon
Properties
Gross Alpha (Excl. Radon and Uranium)
Radionuclides
Hardness
Properties
Hardness (Ca,Mg)
Properties
Hardness (Total)
Properties
Helicobacter pylori
Bacteria
Helicobacter pylori is a type of bacteria that can cause infections in the stomach. It is known to be a major cause of peptic ulcers and is associated with stomach cancer. The bacteria can survive in the harsh acidic environment of the stomach and can be transmitted through contaminated food and water.
Heptanal
VOCs
Hexabromobiphenyl
Hexachlorobutadiene
VOCs
Hexachloroethane
VOCs
Hexadecanoic acid
Organics
Hexahydro 1,3,5 trinitro 1,3,5 triazine (RDX)
Organics
Hexanal
VOCs
Hexane
Petroleum Compounds
Hexazinone
Herbicides
Hydrogen Sulfide
Inorganics
Ibuprofen
Pharma & Personal Care
Indeno(1,2,3-cd)pyrene
Petroleum Compounds
Iodide
Inorganics
Iodine-131
Iridium
Metals
Isophorone
SVOCs
Isopropanol
VOCs
Isopropylbenzene
VOCs
Langelier Saturation Index
Properties
Lead-210
Radionuclides
Linuron
Herbicides
Lithium
Metals
m-Xylene
Petroleum Compounds
m,p Xylene
Petroleum Compounds
Magnesium
Minerals
Magnesium Peroxalate
VOCs
Malathion
Pesticides
MCPA
Herbicides
MCPP
Herbicides
Merphos
Herbicides
Methane
Inorganics
Methiocarb
Pesticides
Methomyl
Pesticides
Methyl acetate
VOCs
Methyl acrylonitrile
VOCs
Methyl Ethyl Ketone
VOCs
Methyl glyoxal
Methyl Iodide
VOCs
Methyl Methacrylate
VOCs
Methyl parathion
Pesticides
Methyl Tertiary Butyl Ether
Petroleum Compounds
Methylene Blue Active Substances
Properties
Metochlor ESA
Metochlor OA
Metolachlor
Herbicides
Metribuzin
Herbicides
Mevinphos
Pesticides
Mexacarbate
Pesticides
Microcystin-LA
Toxins
Microcystin-LF
Toxins
Microcystin-LR
Toxins
Microcystin-LY
Toxins
Microcystin-RR
Toxins
Microcystin-YR
Toxins
Microcystins
Toxins
Microplastics (3 micron)
Mirex
Pesticides
Molinate
Herbicides
Molybdenum
Metals
Monocrotophos
Pesticides
n Butylbenzene
VOCs
N nitrosodiethylamine
SVOCs
N nitrosopyrrolidine
SVOCs
n Propylbenzene
VOCs
n-Decane
Petroleum Compounds
N-ethyl perfluorooctanesulfonamidoacetic acid
PFAS
N-methyl perfluorooctanesulfonamidoacetic acid
PFAS
N-Nitrosodi-n-Propylamine
SVOCs
N-Nitrosodiphenylamine
SVOCs
N-Nitrosomethylphenylamine
SVOCs
N-Nitrosomorpholine
SVOCs
n-Octacosane
n-Propyl alcohol
VOCs
Naled
Pesticides
Naphthalene
Petroleum Compounds
Napropamide
Herbicides
NDBA
VOCs
Neburon
Pesticides
Nickel
Metals
Nitrate (as N)
Inorganics
Nitrate (as NO3)
Inorganics
Nitrite (as N)
Inorganics
Nitrite and Nitrate
Inorganics
Nitrobenzene
VOCs
NMEA
Nodularin
Toxins
Non-Spore Forming Fungi
Fungi
Non-spore forming fungi are a type of fungi that do not produce spores as part of their reproductive cycle. They can be found in various environments, including soil, water, and organic matter. These fungi can be significant in the decomposition of organic materials and play a role in nutrient cycling.
Nonanal
VOCs
NPIP
SVOCs
o Toluidine
VOCs
o Xylene
Petroleum Compounds
o-Cresol
SVOCs
O-ethyl toluene
Organics
Octadecanoic acid
Organics
Octanal
VOCs
Octogen
Odor
Properties
Orthophosphate (as P)
Inorganics
Oryzalin
Pesticides
Oxidation Reduction Potential
Properties
Oxyfluorfen
Herbicides
Ozone
Disinfectants
p Isopropyltoluene
VOCs
p-Cresol
SVOCs
p-Xylene
Petroleum Compounds
PAHs
Petroleum Compounds
Paraquat
Herbicides
PCB 1016
Flame Retardants
PCB 1221
Flame Retardants
PCB 1232
Flame Retardants
PCB 1242
Flame Retardants
PCB 1248
Flame Retardants
PCB 1254
Flame Retardants
PCB 1260
Flame Retardants
PCB 1262
Flame Retardants
Pebulate
Herbicides
Penoxalin
Pesticides
Pentachlorobenzene
SVOCs
Pentachloroethane
VOCs
Pentanal
Perchlorate
Inorganics
Perfluorobutanesulfonic acid
PFAS
Perfluorobutanoic acid
PFAS
Perfluorodecanoic acid
PFAS
Perfluorododecanoic acid
PFAS
Perfluoroheptanesulfonic acid
PFAS
Perfluoroheptanoic acid
PFAS
Perfluorohexanoic acid
PFAS
Perfluoropentanesulfonic acid
PFAS
Perfluoropentanoic acid
PFAS
Perfluorotetradecanoic acid
PFAS
Perfluorotridecanoic acid
PFAS
Perfluoroundecanoic acid
PFAS
Permethrin
Pesticides
pH
Properties
Phenanthrene
Petroleum Compounds
Phenol
SVOCs
Phorate
Pesticides
Phosphorus
Inorganics
Phthalic anhydride
SVOCs
Picloram
Herbicides
Platinum
Metals
Potassium
Minerals
Potassium-40
Radionuclides
Profenofos
Pesticides
Profluralin
Pesticides
Prometon
Herbicides
Prometryn
Herbicides
Propachlor OA
Herbicides
Propanal
VOCs
Propanil
Pesticides
Propazine
Herbicides
Propham
Pesticides
Propionitrile
VOCs
Propoxur
Pesticides
Pyrene
Petroleum Compounds
Quinclorac
Pesticides
Quinoline
Pesticides
Radium 226
Radionuclides
Radium 228
Radionuclides
Radon
Radionuclides
Residue (Total)
Properties
Ronnel
Pesticides
Ruthenium
Metals
Saxitoxin
sec Butylbenzene
VOCs
Siduron
Herbicides
Silica
Inorganics
Simetryn
Herbicides
Sodium
Minerals
Sodium Adsorption Ratio
Properties
Specific Conductivity
Properties
Specific UV Absorbance
Properties
Strontium
Metals
Strontium-90
Radionuclides
Sulfate
Inorganics
Sulfide (Dissolved)
Inorganics
Surfactants
Properties
Tebuconazole
Pesticides
Tebuthiuron
Herbicides
Temperature
Properties
Terbacil
Herbicides
Terbufos
Pesticides
Terbufos sulfone
Pesticides
Terbutryn
Herbicides
tert Butylbenzene
VOCs
tert-Amyl methyl ether
Petroleum Compounds
Tert-Butyl Alcohol
VOCs
Testosterone
Steroids/Hormones
Tetrachlorvinphos E Isomer
Pesticides
Tetrahydrofuran
VOCs
Thiobencarb
Herbicides
Thorium
Metals
Tin
Metals
Titanium
Metals
Toluene
Petroleum Compounds
Total Bacteria
Bacteria
Total bacteria refers to the total number of bacteria present in a water sample. It is an important indicator of water quality and can indicate the presence of pathogens that may pose health risks.
Total Dissolved Solids
Properties
Total HPC
Bacteria
Total Kjeldahl Nitrogen
Properties
Total Organic Carbon
Properties
Total PFAS
PFAS
Total Suspended Solids
Properties
trans 1,3 Dichloropropene
VOCs
trans Nonachlor
Pesticides
trans Permethrin
Pesticides
trans-1,4-Dichloro-2-butene
VOCs
Tri(2-butoxyethyl) phosphate
Organics
Triadimefon
Pesticides
Tribufos
Herbicides
Trichloroacetonitrile
Trichlorofluoromethane
VOCs
Trichloronate
Trichlorotrifluoroethane
VOCs
Triclopyr
Triclosan
Pharma & Personal Care
Trifluralin
Herbicides
Tritium
Radionuclides
Tungsten
Metals
Turbidity
Properties
Uranium-234
Radionuclides
Uranium-235
Radionuclides
UV Abs at 254 nm
Properties
Vanadium
Metals
Vernolate
Herbicides
Vinyl acetate
VOCs
Xylenes (Total)
Petroleum Compounds
Zinc
Metals
Zirconium
Metals
Understanding EPA MCLG Levels
Science-based limits for safe drinking water
What is EPA MCLG?
EPA MCLG Levels represent the maximum concentration of a contaminant in drinking water that poses minimal health risk based on the latest scientific research. These guidelines are often more protective than federal legal limits, prioritizing public health over cost and feasibility.
Science-Based
Derived from peer-reviewed health studies and toxicological research
Protective
Account for vulnerable populations including children and pregnant women
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