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Total discharges to water: By pollutant, COD
This stacked bar chart shows the discharges to water of the Chemical Oxygen Demand business segment, analyzed by pollutant type.

Image with a graph of Total discharges to water: By pollutant, COD

Total discharges to water: By pollutant, COD
	Units	1999	2000	2001	2002	2003	2004	2005	2006
Discharges to water - Group total	Tonnes	46,381	58,399	80,918	125,872	57,067	56,981	45,883	71,322
Discharges to water - R&M (5)	Tonnes	2,449	2,812	2,963	4,935	5,085	7,949	6,453	4,376
COD discharged - R&M (4)	Tonnes	7,911	8,973	10,107	10,430	9,738	6,728	6,453	4,376
Discharges to water - Chemicals (7)	Tonnes	8,088	8,071	10,708	9,036	9,376	7,647	1,977
COD discharged - Chemicals (7,8)	Tonnes							1,977
Discharges to water - GRST and Other (3,8)	Tonnes							101	3
COD discharged - GRST and Other (8)	Tonnes							101	3

(3) 'Other' businesses includes aluminum and BP corporate functions/offices. In 2005 Wingles, SECCO, PEMSB and Pasadena which were previously part of Chemicals were included in 'Other' businesses. From 2006 SECCO and PEMSB are included with Refinery and Marketing.
(4) COD - Chemical Oxygen Demand
(5) The total discharges to water for Refining and Marketing includes oils and greases but excludes COD
(7) Chemicals business in 2005 is the Innovene business sold as Ineos
(8) New water categories reported for the first time in the charting tool in 2005

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