Schedule 2 GUIDELINE VALUES

No in Annex II to 75/440/EEC	Parameters		DW1	DW2	DW3
1 The value given is an upper limit set in relation to the mean annual temperature (high and low).
2 This parameter has been included to satisfy the ecological requirements of certain types of environment.
* See regulation 8(1)(c)
1	pH		6.5 to 8.5	5.5 to 9	5.5 to 9
2	Coloration (after simple filtration)	mg/1 Pt Scale	10	50	50
3	Total suspended solids	mg/1 SS	25
4	Temperature	°C	22	22	22
5	Conductivity at 20°C	μs/cm	1000	1000	1000
6	Odour	dilution factor at 25°C	3	10	20
7^f1	Nitrates	mg/1 NO₃	25
8^f2	Fluorides	mg/1 F	0.7 to 1	0.7 to 1.7	0.7 to 1.7
10	Dissolved iron	mg/1 Fe	0.1	1	1
11	Manganese	mg/1 Mn	0.05	0.1	1
12	Copper	mg/1 Cu	0.02	0.05	1
13	Zinc	mg/1 Zn	0.5	1	1
14	Boron	mg/1 B	1	1	1
19	Arsenic	mg/1 As	0.01		0.05
20	Cadmium	mg/1 Cd	0.001	0.001	0.001
24	Mercury	mg/1 Hg	0.0005	0.0005	0.0005
27	Sulphates	mg/1 SO₄	150	150	150
28	Chlorides	mg/1 Cl	200	200	200
29	Surfactants (reacting with methyl blue)	mg/1 (laurylsulphate)	0.2	0.2	0.5
30^f3	Phosphates	mg/1 P₂O₅	0.4	0.7	0.7
31	Phenols (phenol index) paranitroaniline 4-aminoantipyrine	mg/1 C₆H₅OH		0.001	0.01
32	Dissolved or emulsified hydro carbons (after extraction by petroleum ether)	mg/1			0.5
35	Chemical oxygen demand (COD)	mg/1 O₂			30
36	Dissolved oxygen saturation rate	% O₂	>70	>50	>30
37	Biochemical oxygen demand (BOD₅) (at 20°C without nitrification)	mg/1 O₂	<3	<5	<7
38	Nitrogen Kjeldahl method (except NO₃)	mg/1 N	1	2	3
39	Ammonia	mg/1 NH₄	0.05	1	2
40	Substances extractable with chloroform	mg/1 SEC	0.1	0.2	0.5
43	Total coliforms 37°C	/100ml	50	5,000	50,000
44	Faecal coliforms	/100ml	20	2,000	20,000
45	Faecal streptococci	/100ml	20	1,000	10,000
46	Salmonella		Not present in 5,000ml	Not present in 1,000ml

Annotations

Footnotes

f1

See regulation 8(1)(c)

f2

The value given is an upper limit set in relation to the mean annual temperature (high and low).

f3

This parameter has been included to satisfy the ecological requirements of certain types of environment.