Ecosystem Targets and Supporting Indicators

Industrial Chemical Discharges (TRI data )

This indicator compiles the total amount of discharges of toxic chemicals manufactured and used at industrial facilities that are released into the Sound either by air or by water.

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Industrial Chemical Discharges (CT NY portion of watershed and Total LIS watershed)
Total On-Site Releases, CT and NY* (millions of pounds)Surface Water Discharges, CT and NY (millions of pounds)
198835.1451406.086450
198928.2952064.758350
199023.1906824.016130
199121.8253803.906330
199218.2223533.070790
199314.1907932.347560
199411.6252952.229990
19959.1101311.490960
19967.4873230.659290
19977.2063030.671470
19985.6871470.600930
19995.980331 1.013122
20007.938990 0.816719
20017.109360 0.785849
20025.7089900.756887
20035.3714300.731102
20044.7510400.470025
20054.5073120.473471
20063.9695910.504173
20073.5389510.442516
20082.7271670.253150
20092.3652520.310493
20101.8870270.300821
20111.3481230.243856
20121.2400680.223976
20131.4705740.209801
20141.2561230.084907
20151.0454780.068699
20160.9413120.038256
2017
2018
On-Site releases for total LIS watershed, including upper watershed states (pounds)
LandWaterAir
2003112,770739,2536,716,583
200461,009515,5545,690,616
200536,368577,3915,350,229
200620,636455.2884,219,420
200759,806392,5413,988,944
200824,120175,5483,227,530
200921,313175,9562,781,267
201084,077164,1101,883,924
201137,994117,7331,382,262
201210,926137,9041,226,061
20132,303138,5741,591,474
20141,92664,8661,690,405
20152,82654,9001,250,298
201666238,2421,136,723
2017
2018

WHAT ARE INDUSTRIAL CHEMICAL DISCHARGES?

The EPA maintains the Toxics Release Inventory (TRI), a national database that identifies more than 600 designated toxic chemicals manufactured and used at industrial facilities and the annual amounts of these chemicals released as waste.

WHAT DOES THIS INDICATE?

The decline in industrial chemical discharges indicates progress in reducing the release of contaminants into Long Island Sound’s watershed.

STATUS

Toxic releases in the Sound’s watershed have declined by more than 90 percent since the late 1980s. This is consistent with trends in toxic releases throughout the country. Facilities releasing industrial chemicals have been improved with better emissions-reducing technology.  There has also been an increase in the national awareness of the harmful effects of toxic releases. Air emissions account for the majority of on-site releases.

DATA NOTE

*Total on-site releases include air emissions, other on-site land releases, and surface water discharges.

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