Reference_Number	Reference_Text
1	California Department of Public Health, California Code of Regulations, Title 22, Division 4, Chapter 15, Domestic Water Quality and Monitoring, http://www.cdph.ca.gov/certlic/drinkingwater/Pages/Lawbook.aspx.
2	U.S. Environmental Protection Agency, Title 40, Code of Federal Regulations, Parts 141 [Primary MCLs] and 143 [Secondary MCLs], http://www.epa.gov/safewater/contaminants/index.html.
3	U.S. Environmental Protection Agency, Office of Water, 2006 Edition of the Drinking Water Regulations and Health Advisories (Summer 2006), http://www.epa.gov/waterscience/drinking/.
4	U.S. Environmental Protection Agency, Region 9, Drinking Water Branch, Drinking Water Standards and Health Advisory Table (February 2000).
5	California Department of Public Health, Division of Drinking Water and Environmental Management, Maximum Contaminant Levels and Regulation Dates for Drinking Water, U.S. EPA vs California, http://www.cdph.ca.gov/certlic/drinkingwater/Documents/DWdocuments/EPAandCDPH.pdf.
6	U.S. Environmental Protection Agency, Integrated Risk Information System [IRIS] database (as of  30 June 2008), http://www.epa.gov/iris.
7	U.S. Environmental Protection Agency, Office of Water, National Primary Drinking Water Regulations, Contaminant Specific Fact Sheets - Technical Version (October 1995), http://www.epa.gov/safewater/hfacts.html.
8	U.S. Environmental Protection Agency, Federal Register, Vol. 54, No. 97 (Mon., 22 May 1989), pp. 22138, 22139.
9	U.S. Environmental Protection Agency, Quality Criteria for Water (1976) [The Red Book], http://www.epa.gov/waterscience/criteria/redbook.pdf.
10	California Environmental Protection Agency (Cal/EPA), Office of Environmental Health Hazard Assessment, Public Health Goals for Chemicals in Drinking Water (various dates),  http://www.oehha.org/water/phg/.
11	U.S. Environmental Protection Agency, Office of Drinking Water, Health Advisory documents; or Office of Water, Drinking Water Health Advisory documents (various dates), http://www.epa.gov/waterscience/criteria/drinking/.
12	National Academy of Sciences, Drinking Water and Health, Vol.1 (1977), Vol. 3 (1980), Vol. 4 (1982), Vol. 5 (1983), Vol. 6 (1986), and Vol. 7 (1987), http://www.nap.edu.
13	U.S. Environmental Protection Agency, Water Quality Advisory documents (various dates).
14	Cal/EPA, Office of Environmental Health Hazard Assessment, California Code of Regulations, Title 27, Division 4, Chapter 1, http://www.oehha.org/prop65.html.
15	Cal/EPA, Office of Environmental Health Hazard Assessment, Proposition 65 Safe Harbor Levels, http://www.oehha.org/prop65/getNSRLs.html.
16	U.S. Environmental Protection Agency, Quality Criteria for Water, 1986 (May 1986) [The Gold Book], http://www.epa.gov/waterscience/criteria/goldbook.pdf, plus updates (various dates), http://www.epa.gov/waterscience/pc/ambient2.html.
17	U.S. Environmental Protection Agency, Federal Register, Volume 65, No. 97 (Thursday, 18 May 2000), pp. 31682-31719; and Federal Register, Volume 66, No. 30 (Tuesday, 13 February 2001), pp. 9960-9962 [California Toxics Rule and Correction], http://www.gpoaccess.gov/fr/.
18	Cal/EPA, Office of Environmental Health Hazard Assessment, Cal/EPA Toxicity Criteria Database (as of 9 April 2007), http://www.oehha.org/risk/ChemicalDB/index.asp.
19	Ayers, R. S. and D. W. Westcot, Water Quality for Agriculture, Food and Agriculture Organization of the United Nations - Irrigation and Drainage Paper No. 29, Rev. 1, Rome (1985), http://www.fao.org/DOCREP/003/T0234E/T0234E00.htm.
20	U.S. Environmental Protection Agency, Water Quality Criteria, 1972 (March 1973) [The Blue Book].
21	U.S. Environmental Protection Agency, Federal Register, Volume 64, No. 216, (Tuesday, 9 November 1999), pp. 61182-91196 [National Toxics Rule revisions], http://www.gpoaccess.gov/fr/.
22	U.S. Environmental Protection Agency, Federal Register, Volume 57, No. 246 (Tuesday, 22 December 1992), pp. 60848-60923 [National Toxics Rule].
23	U.S. Environmental Protection Agency, Federal Register, Volume 60, No. 86, (Thursday, 4 May 1995), pp. 22228-22237 [National Toxics Rule revisions], http://www.gpoaccess.gov/fr/.
24	U.S. Environmental Protection Agency, National Ambient Water Quality Criteria and National Recommended Water Quality Criteria documents (various dates), http://www.epa.gov/waterscience/criteria/.
25	U.S. Environmental Protection Agency, Office of Water, Aquatic Life Ambient Freshwater Quality Criteria - Copper, 2007 Revision, EPA-822-R-07-001 (February 2007), http://epa.gov/waterscience/criteria/copper/.
26	U.S. Environmental Protection Agency, Office of Water, National Recommended Water Quality Criteria (2006), http://www.epa.gov/waterscience/criteria/wqcriteria.html.
27	California State Water Resources Control Board, Policy for Implementation of Toxics Standards for Inland Surface Waters, Enclosed Bays, and Estuaries of California (24 February 2005), http://www.waterboards.ca.gov/plans_policies/.
28	California State Water Resources Control Board, 2005 California Ocean Plan: Water Quality Control Plan for Ocean Waters of California (4 February 2006), http://www.waterboards.ca.gov/water_issues/programs/ocean/.
29	J.E. Amoore and E. Hautala, Odor as an Aid to Chemical Safety: Odor Thresholds Compared with Threshold Limit Values and Volatilities for 214 Industrial Chemicals in Air and Water Dilution, Journal of Applied Toxicology, Vol. 3, No. 6 (1983), http://www3.interscience.wiley.com/journal/2457/home.
30	California State Water Resources Control Board, Water Quality Criteria, McKee & Wolf (1963, 1978), http://www.waterboards.ca.gov/publications_forms/publications/general/.
31	Cal/EPA, Office of Environmental Health Hazard Assessment, Air Toxics Hot Spots Program Risk Assessment Guidelines: Part II - Technical Support Document for Describing Available Cancer Potency Factors (May 2005), http://www.oehha.org/air/cancer_guide/index.html.
32	California Department of Fish and Game, Office of Spill Prevention and Emergency Response, Hazard Assessment and Water Quality Criteria documents for pesticides (various dates), http://www.cdpr.ca.gov/docs/sw/hazasm.htm.
33	U.S. Environmental Protection Agency, Office of Water, Drinking Water Advisory: Consumer Acceptability Advice and Health Effects Analysis documents (various dates), http://www.epa.gov/safewater.
34	U.S. Environmental Protection Agency, Office of Research and Development, Oral Reference Doses and Oral Slope Factors for JP-4, JP-5, Diesel fuel, and Gasoline, memorandum from Joan Dollarhide to Carol Sweeney, Region X (24 March 1992).
35	California Department of Public Health, Division of Drinking Water and Environmental Management, Drinking Water Notification Levels, http://www.cdph.ca.gov/certlic/drinkingwater/Pages/NotificationLevels.aspx.
36	U.S. Environmental Protection Agency, Office of Pesticide Programs, Registration Eligibility Decision (RED) Documents, http://www.epa.gov/pesticides/reregistration/status.htm.