Contaminated land

We manage an inherited portfolio of historically contaminated land including former manufactured  gas plants, industrial landfills, former gas holders and older substations on our transmission and distribution networks. Sites can sometimes have a complex mix of contamination dating back over 100 years.

National Grid manages land contamination issues on 529 sites (not including KeySpan sites), the majority of which were previously used for gas production. In the US, this includes obligations in relation to land owned by third parties. During 2007/08, environmental work stages were completed on some 189 sites of which 33 included remediation.

Historically contaminated sites
2007/08 (Number)
Historically contaminated sites
529
2006/07 (Number)
Historically contaminated sites
550
2005/06 (Number)
Historically contaminated sites
572
2004/05 (Number)
Historically contaminated sites
640
2003/04 (Number)
Historically contaminated sites
664

2007/08 data excludes KeySpan.


Site clean ups completed
2007/08 (Number)
Sites completed
33
2006/07 (Number)
Sites completed
35
2005/06 (Number)
Sites completed
39
2004/05 (Number)
Sites completed
41
2003/04 (Number)
Sites completed
67

2007/08 dexcludes KeySpan.