SLIDE 6 Major water quality issues, World Major water quality issues, World-
wide
Issue Issue Water Water body body Sector affected Sector affected Time Time Extent Extent Organic Poll. Organic Poll.* * R, L, GW R, L, GW Aquatic env. Aquatic env. <1 yr <1 yr Local Local-
District Pathogens Pathogens* * R, L, GW R, L, GW Human health Human health <1 yr <1 yr Local Local Salinization Salinization GW, R GW, R Most uses Most uses 1 1-
10 yr Dist Dist-
Region Nitrate Nitrate* * R, L, GW R, L, GW Health, Aquatic Health, Aquatic >10 yr >10 yr Local Local-
Region Heavy Heavy Mtls Mtls* * All bodies All bodies Health, Aquatic Health, Aquatic <1 <1-
10yr Local Local-
Global Organics Organics* * All bodies All bodies Health, Aquatic Health, Aquatic 1 1-
10 yr Local Local-
Global Acidification Acidification R, L, GW R, L, GW Health, Aquatic Health, Aquatic >10 yr >10 yr Dist Dist-
Region Eutrophication Eutrophication* * R, L R, L Most uses, Most uses, Aquatic Aquatic >10 yr >10 yr Local Local Sedimentation Sedimentation* * R, L R, L Most uses, Most uses, Aquatic Aquatic 1 1-
10 yr Local Local-
Region Dams/Diversions Dams/Diversions R, L, GW R, L, GW Most uses, Most uses, Aquatic Aquatic 1 1-
10 yr Dist Dist-
Region
Source: UNESCO World Water Assessment Prog; 2003. NOTE: * = NPS