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National Drinking Water Database


National Drinking Water Database - Chemical Contaminants

Combined Uranium (mg/L)


Status: Regulated - EPA has established a maximum legal limit in tapwater for this contaminant.

Uranium is a radioactive element commonly found in most rocks; processed uranium ore is used for power generation and weapons manufacture. [read more]

 
Detected
Found above
health guidelines
Found above
legal limit
States
28
28
20
Water utilities
2,830
2,830
192
People Served
24,329,141
24,329,141
715,090

Health Concerns for Combined Uranium (mg/L):


Combined Uranium (mg/L) Exposure by State

Water utilities in 28 states have reported detecting Combined Uranium (mg/L) in treated tap water since 2004, according to EWG's analysis of water quality data supplied by state water agencies.

StateWater Suppliers with Combined Uranium (mg/L) contaminationWater suppliers reporting Combined Uranium (mg/L) above health-based limits
SystemsPopulationSystemsPopulation
New Jersey5007,323,3645007,323,364
California1576,740,5951576,740,595
Texas1432,903,6211432,903,621
Nevada701,905,680701,905,680
New Mexico2361,200,9182361,200,918
Connecticut415972,301415972,301
Nebraska105844,557105844,557
Oklahoma52811,37052811,370
Wisconsin127266,647127266,647
Arizona2266,0002266,000
New Hampshire409261,873409261,873
Massachusetts26152,95026152,950
Montana123122,577123122,577
New York9980,0579980,057
Alaska14578,75914578,759
Oregon3670,8433670,843
Missouri2166,0312166,031
North Dakota1663,5661663,566
Arkansas2837,0712837,071
Virginia1931,6471931,647
Illinois831,524831,524
Colorado129,500129,500
Vermont4327,6694327,669
Idaho1617,6291617,629
Wyoming1416,9351416,935
Iowa43,71843,718
Maine141,709141,709
Rhode Island130130
Total2,83024,329,1412,83024,329,141

The Most Polluted Communities

2,830 water utilities reported detecting Combined Uranium (mg/L) in tap water since 2004, according to EWG's analysis of water quality data supplied by state water agencies

Ranked by highest average Combined Uranium (mg/L) level

RankSystem Population Served Positive test results of total reported tests Average Level
(Range)
1Sandy Lane Village Condominium Assn
Brookfield, CT
3184 of 476.58 ppb
(65.34 to 84.72 ppb)
2Candlewood Lake Condominium Assn., Inc.
Danbury, CT
1967 of 775.31 ppb
(63.68 to 89.49 ppb)
3Acre Lane, Inc.
Ridgefield, CT
569 of 975.21 ppb
(62.15 to 85.59 ppb)
4Village of Beemer
Beemer, NE
7001 of 172.1 ppb
(72.1 ppb)
5Utility Development & Research
Riviera, TX
6307 of 771.81 ppb
(65.8 to 81.6 ppb)
6Valley Estates Water and Sewer Associati
Espanola, NM
1851 of 170 ppb
(70 ppb)
7Nichols Trailer Park
Shelburne, ME
754 of 466.73 ppb
(49 to 76.39 ppb)
8Rio Brazos Water System
TX
818 of 866.19 ppb
(49.8 to 84.1 ppb)
9Kern County Water Agency
Bakersfield, CA
01 of 164.1 ppb
(64.1 ppb)
10Md#07 Marina View Heights
Bass Lake, CA
2002 of 262.5 ppb
(40 to 85 ppb)

Health Based Limits for Combined Uranium (mg/L)

StandardDescriptionLevel
Maximum Contaminant Limit Goal (MCLG)A non-enforceable health goal that is set at a level at which no known or anticipated adverse effect on the health of persons occurs and which allows an adequate margin of safety. Source: U.S. Environmental Protection Agency.0 ppb
California Public Health GoalsDefined by the State of California Office of Environmental Health Hazard Assessment (OEHHA) as the level of contaminant that is allowed in drinking water. For acutely toxic substances, levels are set at which scientific evidence indicates that no known or anticipated adverse effects on health will occur, plus an adequate margin-of safety. PHGs for carcinogens or other substances which can cause chronic disease shall be based solely on health effects without regard to cost impacts and shall be set at levels which OEHHA has determined do not pose any significant risk to health.0.5 ppb
Drinking Water Equivalent LevelA lifetime exposure concentration protective of adverse, noncarcinogenic health effects, that assumes all of the exposure to a contaminant is from drinking water. Source: U.S. Environmental Protection Agency.20 ppb
Maximum Contaminant Limit (MCL)The enforceable standard which defines the highest level of a contaminant that is allowed in drinking water. MCLs are set as close to health-based limits (Maximum Contaminant Level Goals, or MCLGs) as feasible using the best available analytical and treatment technologies and taking cost into consideration. Source: U.S. Environmental Protection Agency.30 ppb

Testing Summary for Combined Uranium (mg/L)

Are tests routinely required for Combined Uranium (mg/L) by federal law?Yes
Water suppliers reporting tests for Combined Uranium (mg/L) (2004-2009):4,414 of 47,576
Average testing rate for water supplier reporting tests (2004-2009):0.6 per year

Violation Summary for Combined Uranium (mg/L)

Data from the U.S. Environmental Protection Agency includes the following violations of federal standards for Combined Uranium (mg/L) since 2004

Maximum Contaminant Level Exceedance Violations1,220
Monitoring Violations9,073
Reporting Violations0

Cancer

Type of concern: Reference:
Known human carcinogen Amer Conf of Gov't Industrial Hygienists - Carcinogens
Cancer - strong evidence CHE Toxicant and Disease Database

Persistence and bioaccumulation

Type of concern: Reference:
Not suspected to be bioaccumulative Environment Canada Domestic Substance List

Occupational hazards

Type of concern: Reference:
Allowed workplace exposures restricted to very low doses European Union - Classification & Labelling
Allowed workplace exposures restricted to very low doses National Library of Medicine HazMap
Allowed workplace exposures restricted to very low doses RTECS®- TLV/BEI,2007
Allowed workplace exposures restricted to low doses National Library of Medicine HazMap
Strong evidence of occupational hazards European Union - Classification & Labelling
Single case study detailing occupational hazards Frazier , L, 1998

Organ system toxicity (non-reproductive)

Type of concern: Reference:
Possible human renal toxicant CHE Toxicant and Disease Database
Classified as very toxic or harmful European Union - Classification & Labelling
Limited evidence of renal toxicity CHE Toxicant and Disease Database
Limited evidence of respiratory toxicity US EPA, Air Risk Information Support Center, 1990
Limited evidence of kidney toxicity Agency for Toxic Substances and Disease Registry, 2004
One or more animal studies show broad systemic effects at moderate doses (low dose studies may be unavailable for this ingredient) RTECS®- Gigiena i Sanitariya 1972
Classified as not expected to be potentially toxic or harmful Environment Canada Domestic Substance List
Classified as a low human health priority Environment Canada Domestic Substance List

Ecotoxicology

Type of concern: Reference:
Wildlife and environmental toxicity European Union - Classification & Labelling
Not 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)
European Union - Classification & LabellingURANIUM•Very toxic
•Very toxic by inhalation and if swallowed
•Danger of cumulative effects
•May cause long-term adverse effects in the aquatic environment
European Union - Classification & LabellingURANIUM COMPOUNDS•Very toxic
•Very toxic by inhalation and if swallowed
•Danger of cumulative effects
•Dangerous for the environment
•Toxic to aquatic organisms
Amer Conf of Gov't Industrial Hygienists - CarcinogensURANIUM (AS U)•Confirmed human carcinogen (ACGIH classification A1)
Association of Occupational and Environmental ClinicsURANIUM• o
Environment Canada Domestic Substance ListURANIUM•This chemical was deemed a low human health priority and was NOT flagged by CEPA for further attention. The chemical was flagged for suspected persistence.
National Library of Medicine HazMapURANIUM AND COMPOUNDS•Nephrotoxin: Yes;
•PEL (OSHA) - Permissible exposure limit (OSHA): 0.05 mg/m3, as U;
•STEL (ACGIH) - Short-term exposure limits (ACGIH): 0.6 mg/m3, as U;
•Bioaccumulates: Yes;
•TLV (ACGIH) - Threshold limit value (ACGIH): 0.2 mg/m3, as U;
•Flammability (NFPA) - NFPA flammability code: 0 = will not burn; 1 = must be preheated; 2 = high ambient temp required; 3 = may ignite at ambient temp; 4 = burn readily: 4: burns readily;
•IDLH (NIOSH) - Immediately Dangerous to Life or Health: 10 mg/m3, as U;
Agency for Toxic Substances and Disease Registry, 2004URANIUM•Kidney toxicity hazards: suspected
US EPA, Air Risk Information Support CenterURANIUM•Cardiovascular or blood toxicity hazards: suspected
US EPA, Air Risk Information Support Center, 1990URANIUM•Respiratory toxicity hazards: suspected
Frazier , L, 1998URANIUM•Reproductive toxicity hazards: suspected
Agency for Toxic Substances and Disease Registry, 2004URANIUM (SOLUBLE SALTS)•Kidney toxicity hazards: suspected
RTECS®- TLV/BEI,2007URANIUM• occupationally related - ACGIH TLV (human TWA)
RTECS®- Gigiena i Sanitariya 1972URANIUM• broad systemic - Broad systemic toxicity (rat LD50)



references

government/industry list/academic study reference
European Union - Classification & LabellingCPS&Q (Consumer Products Safety & Quality) formely known as ECB (European Chemicals Bureau). 2008. Classification and Labelling: Chemicals: Annex VI of Directive 67/548/EEC through the 31st ATP.
Amer Conf of Gov't Industrial Hygienists - CarcinogensACGIH (American Conference of Governmental Industrial Hygienists) 2008. ACGIH cancer classification system. www.acgih.org.
Association of Occupational and Environmental ClinicsAOEC (Association of Occupational and Environmental Clinics). 2009. AEOC exposures codes and asthmagen designation.
Environment Canada Domestic Substance ListEC (Environment Canada). 2008. Domestic Substances List Categorization. Canadian Environmental Protection Act (CEPA) Environmental Registry.
National Library of Medicine HazMapNLM (National Library of Medicine). 2006. HazMap — Occupational Exposure to Hazardous Agents.
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, A Relational Database of Hazardous Chemicals and Occupational Diseases. Browse Haz-Map by Adverse Effects http://hazmap.nlm.nih.gov/hazmapadv.html, Landrigan, P.J., Goyer, R.A. Clarkson, T.W., Sandler, D.P., Smith, J.H., Thun, M.J., and R. Wedeen. The Work-Relatedness of Renal Disease. Archives of Environmental Health. 39(3): 225-230. 1984. (Table 2: Estimated Numbers of Workers in the United States with Potential Occupational Exposures to Known or Suspect Nephrotoxins)., Merck & Co. The Merck Manual of Diagnosis and Therapy. TABLE 226-1. Common Nephrotoxic Agents http://www.merck.com/pubs/mmanual/tables/226tb1.htm
Scorecard.org Toxicity InformationUS EPA, Air Risk Information Support Center. Health Effects Notebook for Hazardous Air Pollutants. http://www.epa.gov/ttnatw01/hlthef/hapindex.html
Scorecard.org Toxicity InformationUS EPA, Air Risk Information Support Center. Health Effects Notebook for Hazardous Air Pollutants. http://www.epa.gov/ttnatw01/hlthef/hapindex.html, Nemery, B. Metal Toxicity and the Respiratory Tract. European Respiratory Journal. 3(2): 202-219. 1990.(Table 1: Summary of pulmonary toxicity of metals).
Scorecard.org Toxicity InformationFrazier , L. and M. L. Hage (eds.). Reproductive Hazards of the Workplace, Wiley Europe, 1998. Table 10 (Partial List of Reproductive Toxicants) available at http://www.pharmacy.ohio-state.edu/homepage/safety/chemhygiene_table_repro.pdf.
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
RTECS®- TLV/BEI,2007RTECS®- TLV/BEI,2007
RTECS®- Gigiena i Sanitariya 1972RTECS®- Gigiena i Sanitariya. For English translation, see HYSAAV. (V/O Mezhdunarodnaya Kniga, 113095 Moscow, USSR) V.1- 1936- 37(10),27,1972

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