The Water Quality (Scotland) Regulations 2010

14.—(1) Schedule 3 to the 2001 Regulations is amended in accordance with paragraphs (2) to (4).

(2) For Table 2 substitute—

TABLE 2

ANNUAL SAMPLING FREQUENCIES: WATER SUPPLY ZONES

1 See regulation 6(2) and Table 1 in Schedule 3
2 Sampling for these parameters may be within water supply zones or at supply points as specified in Table 3, subject to note (ii) and (iii) below.
3 Where the population is not an exact multiple of 5,000, the population figure should be rounded up to the nearest multiple of 5,000.
4 Audit monitoring in water supply zones is required only where sodium hypochlorite is added after water has left the treatment works. In other circumstances, audit monitoring is required at supply points.
5 To monitor for total indicative dose (for radioactivity).
(1) Substances and parameters	(2) Estimated population of water supply zone	(3) Reduced	(4) Standard
Subject to check monitoring
E. coli	< 100             ≥ 100	–                –	4
Coliform bacteria			12 per 5,000
Residual disinfectant			population3
Aluminium1
Ammonium
Clostridium
Perfringens (including
spores)21
Colony counts	< 100	1	2
Colour	100-4,999	2	4
Conductivity2	5,000-9,999	6	12
Hydrogen ion	10,000-29,999	12	24
Iron1	30,000-49,999	18	36
Manganese1	50,000-79,999	26	52
Nitrate1	80,000-100,000	38	76
Nitrite1
Odour
Taste
Turbidity
Subject to audit monitoring
Antimony	< 100	–	1
Arsenic	100-4,999	–	4
Benzene2	5,000-100,000	–	8
Benzo(a)pyrene
Boron2
Bromate42
Cadmium
Chromium
Copper
Cyanide2
1,2 dichloroethane2
Enterococci
Fluoride2
Lead
Mercury2
Nickel
Pesticides2
PAH
Selenium
Sodium
Trichloroethene/
Tetrachloroethene2
Tetrachloromethane2
THM
Chloride2
Sulphate2
Total Organic Carbon2
Tritium2
Gross alpha52
Gross beta52
Notes:

(3) For Table 3 substitute—

TABLE 3

ANNUAL SAMPLING FREQUENCIES: SUPPLY POINTS

1 Check monitoring is required only in respect of surface waters (see regulation 6(2) and Table 1 in Schedule 3), otherwise audit monitoring.
2 Audit monitoring at supply points is permitted only where sodium hypochlorite is not added after water has left the treatment works. In other circumstances, audit monitoring is required in water supply zones.
3 To monitor for total indicative dose (for radioactivity).
(1) Item	(2) Substances and parameters	(3) Volume of water supplied m3/d	(4) Reduced	(5) Standard
Subject to check monitoring
1.	Clostridium Perfringens (including spores)1	< 20	–	2
		20–999	2	4
2.	Conductivity	1,000-1,999	6	12
		2,000-5,999	12	24
		6,000-9,999	18	36
		10,000-15,999	26	52
		16,000-32,999	52	104
		33,000-49,999	78	156
		50,000-67,999	104	208
		68,000-84,999	130	260
		85,000-101,999	156	312
		102,000-119,999	183	365
		120,000-241,999	365	730
		242,000-484,999	730	1,460
		485,000-728,999	1,095	2,190
Subject to audit monitoring
3.	Benzene
4.	Boron
5.	Bromate2
6.	Cyanide
7.	1,2 dichloroethane	< 20		1
8.	Fluoride	20-999		4
9.	Mercury	1,000-49,999		8
10.	Pesticides	50,00-89,999		12
11.	Trichloroethene/Tetrachloroethene	90,000-299,999		24
12.	Tetrachloromethane	300,000-649,999		36
13.	Chloride	≥ 650,000		48
14.	Sulphate
15.	Total organic carbon
16.	Tritium
17.	Gross alpha3
18.	Gross beta3
Notes:

(4) For Table 4 substitute—

TABLE 4

ANNUAL SAMPLING FREQUENCIES: WATER TREATMENT WORKS

1 Check monitoring at treatment works is required only when chloramination is practised. In other circumstances, audit monitoring is required.
(1) Item	(2) Substances and parameters	(3) Volume of water supplied m3/d	(4) Reduced	(5) Standard
Subject to check monitoring
1.	E. coli	< 20	–	4
2.	Coliform bacteria	20–1,999	12	52
3.	Colony counts	2,000–5,999	52	104
4.	Residual disinfectant	6,000–11,999	104	208
		≥12,000	104	365
5.	Nitrite1	< 20	–	2
6.	Turbidity	20-999	2	4
		1,000-1,999	6	12
		2,000-5,999	12	24
		6,000-9,999	18	36
		10,000-15,999	26	52
		16,000-32,999	52	104
		33,000-49,999	78	156
		50,000-67,999	104	208
		68,000-84,999	130	260
		85,000-101,999	156	312
		102,000-119,999	183	365
		120,000-241,999	365	730
		242,000-484,999	730	1,460
		485,000-728,999	1,095	2,190
Subject to audit monitoring
7.	Nitrite1	< 20		1
		20–999		4
		1,000–49,999		8
		50,000–89,999		12
		90,000–299,999		24
		300,000–649,999		36
		≥650,000		48
Notes: