How effective has the Clean Water Act been at reducing pollutant mass emissions to the Southern California Bight over the past 35 years?

Article

Abstract

The Clean Water Act (CWA) has regulated discharges of contaminants since 1972. However, evaluations of the CWA’s effectiveness at improving regional water quality are lacking, primarily because integration of monitoring data from multiple dischargers to assess cumulative effects is not required. A rare opportunity exists to assess CWA effectiveness by integrating mass emissions data from all major sources of contaminants to the Southern California Bight from 1971 to 2000. While the coastal population grew by 56% and total effluent volume increased 31% since 1971, mass emissions of nearly all constituents decreased since passage of the CWA, most by greater than 65%. Publicly owned treatment works were the dominant point source of many contaminants, but also accounted for the greatest reductions in pollutant discharge since 1971. As point source treatment has improved, the relative contribution of non-point sources, such as storm water runoff has increased. Despite the increased importance of storm water discharges, regional monitoring and data compilation of this source is lacking, making it difficult to accurately assess trends in non-point source discharge.

Keywords

Clean Water Act effectiveness Mass emissions Status and trends Non-point source discharges Point source discharges Southern California Bight 

References

  1. Ackerman, D., & Schiff, K. (2003). Modeling storm water mass emissions to the Southern California Bight. Journal of Environmental Engineering, 129(4), 308–317.CrossRefGoogle Scholar
  2. Bay, S., Jones, B. H., & Schiff, K. (1999). Study of the impact of stormwater discharge on Santa Monica Bay. Alhambra: Prepared for the Los Angeles County Department of Public Works.Google Scholar
  3. Boesch, D. F., Burroughs, R. H., Baker, J. E., Mason, R. P., Rowe, C. L., & Siefert, R. L. (2001). Marine pollution in the United States. Arlington: Prepared for the Pew Oceans Commission.Google Scholar
  4. Copeland, C. (2002). Clean water act: A summary of the law. Washington, D.C.: Congressional Research Service.Google Scholar
  5. Culliton, T., Warren, M., Goodspeed, T., Remer, D., Blackwell, C., & McDonough, J., III (1990). Fifty years of population changes along the nations coasts. Report No. 2: Coastal Trends Series. Rockville: National Oceanic and Atmospheric Administration, Strategic Assessment Branch.Google Scholar
  6. Knopman, D. S., & Smith, R. A. (1993). 20 years of the clean water act. Environment, 35, 16–41.Google Scholar
  7. McPherson, T. N., Burian, S. J., Turin, H. J., Stenstrom, M. K., & Suffet, I. H. (2002). Comparison of the pollutant loads in dry and wet weather runoff in a southern California urban watershed. Water Science and Technology, 45, 255–261.Google Scholar
  8. National Weather Service (2007a). Public information statement: Driest rain season on record in Los Angeles. http://www.wrh.noaa.gov/lox/Assets/pns_07_01_07.pdf. Accessed 2 July 2007.
  9. National Weather Service (2007b). Monthly precipitation totals for downtown Los Angeles from 1921 to 2006. http://www.wrh.noaa.gov/lox/climate/data/cqt_monthprecip_wy.txt. Accessed 10 April 2008.
  10. Raco-Rands, V. E., & Steinberger, A. (2001). Characteristics of effluents from large municipal wastewater treatment facilities in 1997. In S. B. Weisberg & D. Elmore (Eds.), Southern California Coastal Water Research Project 1999–2000 Annual Report (pp. 28–44). Westminster: SCCWRP.Google Scholar
  11. Schiff, K. (1997). Review of existing storm water monitoring programs for estimating Bight-wide mass emissions from urban runoff. In S. B. Weisberg, C. Francisco, & D. Hallock (Eds.), Southern California Coastal Water Research Project 1996 Annual Report (pp. 44–55). Westminster: SCCWRP.Google Scholar
  12. Schiff, K., Maruya, K., & Christensen, K. (2006). Southern California Bight 2003 Regional monitoring program: II. Sediment chemistry. Westminster: SCCWRP.Google Scholar
  13. Southern California Coastal Water Research Project (SCCWRP) (1973). The ecology of the Southern California Bight: Implications for water quality management. El Segundo: SCCWRP.Google Scholar
  14. Stein, E. D., & Ackerman, D. (2007). Dry weather water quality loadings in arid urban watersheds of the Los Angeles basin, California, USA. Journal of the American Water Resources Association, 43, 398–413.CrossRefGoogle Scholar
  15. Stein, E. D., & Tiefenthaler, T. (2004). Characterization of dry weather metals and bacteria in Ballona Creek. Technical Report 427. Westminster: SCCWRP.Google Scholar
  16. Stein, E. D., Tiefenthaler, L. L., & Schiff, K. (2006). Watershed-based sources of polycyclic aromatic hydrocarbons (PAH) in urban storm water. Environmental Toxicology and Chemistry, 25, 373–385.CrossRefGoogle Scholar
  17. Steinberger, A., & Schiff, K. C. (2003a). Characteristics of effluents from large municipal wastewater treatment facilities in 2000. In S. B. Weisberg & D. Elmore (Eds.), Southern California Coastal Water Research Project 2001–2002 Biennial Report (pp. 2–13). Westminster: SCCWRP.Google Scholar
  18. Steinberger, A., & Schiff, K. C. (2003b). Characteristics of effluents from small municipal wastewater treatment facilities in 2000. In S. B. Weisberg & D. Elmore (Eds.), Southern California Coastal Water Research Project 2001–2002 Biennial Report (pp. 14–30). Westminster: SCCWRP.Google Scholar
  19. Steinberger, A., & Schiff, K. C. (2003c). Characteristics of effluents from non-power industrial facilities in 2000. In S. B. Weisberg & D. Elmore (Eds.), Southern California Coastal Water Research Project 2001–2002 Biennial Report (pp. 31–46). Westminster: SCCWRP.Google Scholar
  20. Steinberger, A., & Stein, E. D. (2004). Characteristics of effluents from power generating stations in the Southern California Bight in 2000. In S. B. Weisberg & D. Elmore (Eds.), Southern California Coastal Water Research Project 2003–2004 Biennial Report (pp. 31–40). Westminster: SCCWRP.Google Scholar
  21. Steinberger, A., Stein, E. D., & Raco-Rands, V. (2004). Offshore oil platform discharges to the pacific outer continental shelf along the coast of Southern California in 1996 and 2000. In S. B. Weisberg, & D. Elmore (Eds.), Southern California Coastal Water Research Project 2003–2004 Biennial Report (pp. 16–30). Westminster: SCCWRP.Google Scholar
  22. Steinberger, A., Stein, E., & Schiff, K. C. (2003). Characteristics of dredged material disposal to the Southern California Bight between 1991 and 1997. In S. B. Weisberg & D. Elmore (Eds.), Southern California Coastal Water Research Project 2001–2002 Biennial Report (pp. 47–57). Westminster: SCCWRP.Google Scholar
  23. Tiefenthaler, L. L., Stein, E. D., & Schiff, K. C. (2008). Watershed and land use-based sources of trace metals in urban storm water. Environmental Toxicology and Chemistry, 27, 277–287.CrossRefGoogle Scholar
  24. US Census Bureau (2000). Population of California counties by decennial census. http://factfinder.census.gov. Accessed 25 May 2007.

Copyright information

© Springer Science+Business Media B.V. 2008

Authors and Affiliations

  1. 1.Southern California Coastal Water Research ProjectCosta MesaUSA

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