Schedule Criteria for the classification of waters

The limits set out below are maxima

(1)	(2)	(3)	(4)	(5)
No. in Annex II to 75/440/EEC	Parameters	DW1	DW2	DW3
Note (1) The value given is an upper limit set in relation to the mean annual temperature (high and low).
2	Coloration (after simple filtration) mg/1 Pt Scale	20	100	200
4	Temperature °C	25	25	25
7	Nitrates mg/1 NO3	50	50	50
8(1)	Fluorides mg/1 F	1·5
10	Dissolved iron mg/1 Fe	0·3	2
12	Copper mg/1 Cu	0·05
13	Zinc mg/1 Zn	3	5	5
19	Arsenic mg/1 As	0·05	0·05	0·1
20	Cadmium mg/1 Cd	0·005	0·005	0·005
21	Total chromium mg/1 Cr	0·05	0·05	0·05
22	Lead mg/1 Pb	0·05	0·05	0·05
23	Selenium mg/1 Se	0·01	0·01	0·01
24	Mercury mg/1 Hg	0·001	0·001	0·001
25	Barium mg/1 Ba	0·1	1	1
26	Cyanide mg/1 Cn	0·05	0·05	0·05
27	Sulphates mg/1 SO4	250	250	250
31	Phenols (phenol index) paranitraniline 4 aminoantipyrine mg/1 C6H5OH	0·001	0·005;	0·1
32	Dissolved or emulsified hydrocarbons (after extraction by petroleum ether) mg/1	0·05	0·2	1
33	Polycyclic aromatic hydrocarbons mg/1	0·0002	0·0002	0·001
34	Total pesticides (parathion, BHC, dieldrin) mg/1	0·001	0·0025	0·005
39	Ammonia mg/1 NH4		1·5	4