Common point source and non-point source discharges

Common point source discharges and typical contaminants

Discharge	Typical contaminants	Useful web-links
Stormwater	Polyaromatic hydrocarbons (PAH) Suspended solids Zinc Copper Lead Microbiological (e.g. E. coli)	Literature & Tools [NIWA] Urban Catchments [MfE] Microbiological Guidelines [MfE]
Wastewater	Microbiological (e.g. E. coli) Nutrients (nitrogen / phosphorus) Suspended solids Colour BOD	Literature & Tools [NIWA]: Microbiological Guidelines [MfE] ESR website
Industrial	Wide range of contaminants	Trade Waste [MfE] Literature & Tools [NIWA] ESR website Industrial Research website
Agricultural	Suspended solids Nutrients (nitrogen / phosphorus) Chemicals (pesticides etc) Microbiological (e.g. E. coli) Colour BOD	Dairying [MfE] Agricultural Runoff [MfE] Literature & Tools [NIWA] Microbiological Guidelines [MfE] AgResearch website Landcare Research website
Irrigation	Suspended solids Nutrients (nitrogen / phosphorus) Chemicals (pesticides etc) Microbiological (e.g. E. coli) Colour BOD	Dairying [MfE] Agricultural Runoff [MfE] Literature & Tools [NIWA] Microbiological Guidelines [MfE] Landcare Research website AgResearch website

Discharge	Typical contaminants	Useful web-links
Agricultural	Microbiological (e.g. E. coli) Nutrients (nitrogen / phosphorus) Suspended solids colour BOD	Dairying [MfE] Agricultural Runoff [MfE] Literature & Tools [NIWA] Microbiological Guidelines [MfE] Landcare Research website AgResearch website
Horticulture	Nutrients (nitrogen / phosphorus) Suspended solids colour BOD Chemicals (pesticides etc)	Literature & Tools [NIWA] HortResearch Home Page Crop and Food Homepage
Forestry	Suspended solids Chemicals (pesticides etc)	Literature & Tools [NIWA] Forest Research website
Landfills and contaminated sites	Wide range of contaminants	Hazardous Waste ID [MfE] Closing Landfills [MfE] Literature & Tools [NIWA] ESR website
Mining	Suspended solids Acid (low pH) metals	Literature & Tools [NIWA] ESR website Industrial Research website
Stormwater	Polyaromatic hydrocarbons (PAH) Suspended solids Zinc Copper Lead Microbiological (e.g. E. coli)	Literature & Tools [NIWA] Urban Catchments [MfE] Microbiological Guidelines [MfE]