# The Urban Waste Water Treatment (Scotland) Regulations 1994, Paragraph 5

Extent: S

Extreme values for the water quality in question shall not be taken into consideration when they are the result of unusual situations such as those due to heavy rain.
TABLE 3
Series of samples taken in any year
Maximum permitted number of samples which fail to conform
4–7
1
8–16
2
17–28
3
29–40
4
41–53
5
54–67
6
68–81
7
82–95
8
96–110
9
111–125
10
126–140
11
141–155
12
156–171
13
172–187;
14
188–203
15
204–219
16
220–235
17
236–251
18
252–268
19
269–284
20
285–300
21
301–317
22
318–334
23
335–350
24
351–365
25

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Source: https://www.legislation.gov.uk/uksi/1994/2842/schedule/3/part/II/paragraph/5 (the official version)
Page: https://openlegislation.uk/urban-waste-water-treatment-scotland-regulations-1994/schedule-3/part-II/paragraph-5
Contains public sector information licensed under the Open Government Licence v3.0. Source: legislation.gov.uk, The National Archives.