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National Drinking Water Database


National Drinking Water Database - Chemical Contaminants

2-Methyl naphthalene


Status: Unregulated - EPA has not established a maximum legal limit in tapwater for this contaminant.

2-Methyl naphthalene is a chemical used to make dyes, resins and pharmaceuticals (such as vitamin K); it is released into the environment from burning fossil fuels, industrial discharges, tar and asphalt.

 
Detected
Found above
health guidelines
Found above
legal limit
States
1
-
-
Water utilities
2
-
-
People Served
14,895
-
-

Health Concerns for 2-Methyl naphthalene:


2-Methyl naphthalene Exposure by State

Water utilities in 1 states have reported detecting 2-Methyl naphthalene in treated tap water since 2004, according to EWG's analysis of water quality data supplied by state water agencies.

StateWater Suppliers with 2-Methyl naphthalene contamination
SystemsPopulation
Delaware214,895
Total214,895

The Most Polluted Communities

2 water utilities reported detecting 2-Methyl naphthalene in tap water since 2004, according to EWG's analysis of water quality data supplied by state water agencies

Ranked by highest average 2-Methyl naphthalene level

RankSystem Population Served Positive test results of total reported tests Average Level
(Range)
1Autumn Woods Mobile Home Park
Wyoming, DE
751 of 10.2 ppb
(0.2 ppb)
2Long Neck Water Company
Long Neck, DE
14,8201 of 3< 0.01 ppb
(0 to 0.03 ppb)

Health Based Limits for 2-Methyl naphthalene

StandardDescriptionLevel
Health-Based Screening LevelA benchmark concentration of contaminants in water that may be of potential concern for human health, if exceeded. For noncarcinogens, the HBSL represents the contaminant concentration in drinking water that is not expected to cause any adverse effects over a lifetime of exposure. For carcinogens, the HBSL range represents the contaminant concentration in drinking water that corresponds to an excess estimated lifetime cancer risk of 1 chance in 1 million to 1 chance in 10 thousand. Source: U.S. Geological Survey.30 ppb

Testing Summary for 2-Methyl naphthalene

Are tests routinely required for 2-Methyl naphthalene by federal law?No
Water suppliers reporting tests for 2-Methyl naphthalene (2004-2007):230 of 47,576
Average testing rate for water supplier reporting tests (2004-2007):0.6 per year

Occupational hazards

Type of concern: Reference:
Allowed workplace exposures restricted to low doses RTECS®- TLV/BEI,2007

Persistence and bioaccumulation

Type of concern: Reference:
Persistent, bioaccumulative in wildlife Emerging PBTs from peer-reviewed literature
Not suspected to be bioaccumulative Environment Canada Domestic Substance List
Not suspected to be persistent Environment Canada Domestic Substance List

Cancer

Type of concern: Reference:
One or more in vitro tests on mammalian cells show positive mutation results RTECS®- Mutation Research 1988

Organ system toxicity (non-reproductive)

Type of concern: Reference:
Limited evidence of respiratory toxicity Agency for Toxic Substances and Disease Registry, 2004
Classified as not expected to be potentially toxic or harmful Environment Canada Domestic Substance List

Irritation (skin, eyes, or lungs)

Type of concern: Reference:
One or more animal studies show skin irritation at very low doses RTECS®- Environmental Toxicology and Pharmacology (Elsevier Science, P 2004

Ecotoxicology

Type of concern: Reference:
Suspected to be an environmental toxin Environment Canada Domestic Substance List



Government, industry, academic studies and classifications

government/industry list/academic study appears on list as classification(s)
Environment Canada Domestic Substance ListNAPHTHALENE, 2-METHYL-•This chemical was NOT flagged by CEPA for further attention. The chemical was flagged for suspected aquatic toxicity.
EPA Integrated Risk Information System (IRIS)2-METHYLNAPHTHALENEData are inadequate for an assessment of human carcinogenic potential
IFRA Fragrance Ingredient List2-METHYLNAPHTHALENE•The chemical has been reported as used in fragrance compounds by IFRA affiliated member companies in 2008.
Emerging PBTs from peer-reviewed literatureNAPHTHALENE, 2-METHYL-•Persistent, bioaccumulative toxicant - Limited or emerging evidence in open scientific literature
Agency for Toxic Substances and Disease Registry, 20042-METHYLNAPHTHALENE•Respiratory toxicity hazards: suspected
RTECS®- TLV/BEI,20072-METHYLNAPHTHALENE• occupationally related - ACGIH TLV (human TWA)
RTECS®- Environmental Toxicology and Pharmacology (Elsevier Science, P 20042-METHYLNAPHTHALENE• skin - Primary skin irritant (rabbit )
RTECS®- Mutation Research 19882-METHYLNAPHTHALENE• mutagenic - Positive mutation assay: Cytogenetic Analysis ( human lym)
• mutagenic - Positive mutation assay: Sister Chromatid Exchange ( human lym)



references

government/industry list/academic study reference
Environment Canada Domestic Substance ListEC (Environment Canada). 2008. Domestic Substances List Categorization. Canadian Environmental Protection Act (CEPA) Environmental Registry.
EPA Integrated Risk Information System (IRIS)EPA (U.S. Environmental Protection Agency). 2008. Integrated Risk Information System (IRIS). Evidence for human carcinogenicity based on 1986-2005 guidelines.
IFRA Fragrance Ingredient ListIFRA (International Fragrance Assocication). 2010. IFRA Fragrance Ingredient List based on 2008 Use Survey. Accessed online 01/04/2010: http://www.ifraorg.org/Home/News/Latest-News/page.aspx/66?xf_itemId=43&xf_selectionDatapartId=25
Emerging PBTs from peer-reviewed literatureEmerging PBTs from peer-reviewed literature
Scorecard.org Toxicity InformationAgency for Toxic Substances and Disease Registry. Minimal risk Levels for Hazardous Substances. January 2004. http://www.atsdr.cdc.gov/mrls.html, Foth, H. Role of the Lung in Accumulation and Metabolism of Xenobiotic compounds - Implications for Chemically Induced Toxicity. Critical Reviews in Toxicology. 25(2): 165-205. 1995. (Table 1:Toxic Damage of Lung by Foreign Compounds).
RTECS®- TLV/BEI,2007RTECS®- TLV/BEI,2007
RTECS®- Environmental Toxicology and Pharmacology (Elsevier Science, P 2004RTECS®- Environmental Toxicology and Pharmacology (Elsevier Science, P.O.Box 7247-7682,Philadelphia,PA 19170 -7682,USA OR Elsevier Science B.V.,P.O.Box 1270,1000 BG Amsterdam,The Netherlands) V.1- Feb.1996- 16,153,2004
RTECS®- Mutation Research 1988RTECS®- Mutation Research. (Elsevier Science Pub. B.V., POB 211, 1000 AE Amsterdam, Netherlands) V.1- 208,155,1988

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