ER01

Discharge from farm and spraydrift/seepage

ER02

Erosion

ER03

Surface runoff from soil

ER04

Drainage and groundwater

ER05

Atmospheric deposition

ER06

Seperate storm sewers

ER07

Storm water overflows

ER08

Untreated discharge/sewage

ER09

Not connected households

ER10

Direct diffuse discharges e.g. from industry or navigation

ER11

Diffuse (not exactly to describe/distinguish)