ABSTRACT
There are hundreds, perhaps thousands of pollutants whose effects are of actual or potential concern. Their numbers increase annually, as new compounds and formulations are synthesised. A substantial minority of these find commercial applications and become significant pollutants of water during their manufacture and in subsequent use. It is clearly impossible within the scope of a short book to discuss all of these in detail; instead, the sources and effects of broad categories of pollutants will be discussed in general terms, and where appropriate reference will be made to further sources of information.
