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The Public Water Supplies (Scotland) Regulations 2014

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This is the original version (as it was originally made).

Regulations 2(1), 2(4), 9 and 11

SCHEDULE 2MONITORING

This schedule has no associated Policy Notes

TABLE 1

PARAMETERS AND CIRCUMSTANCES FOR CHECK MONITORING

(1)

Item

(2)

Parameter

(3)

Circumstances

1.AluminiumWhen used as flocculant or where the water originates from, or is influenced by, surface waters.
2.Ammonium
3.Clostridium perfringens (including spores)Where the water originates from, or is influenced by, surface waters.
4.Coliform bacteria
5.Colony count
6.Colour
7.Conductivity
8.Escherichia coli
9.Hydrogen ion
10.IronWhen used as flocculant or where the water originates from, or is influenced by, surface waters.
11.ManganeseWhere the water originates from, or is influenced by, surface waters.
12.NitrateWhen chloramination is practised.
13.NitriteWhen chloramination is practised.
14.Odour
15.Taste
16.Turbidity

TABLE 2

ANNUAL SAMPLING FREQUENCIES: SAMPLING POINTS(1)

(1)

Item

(2)

Parameter

(3)

Estimated population of

water supply zone

(4)

Reduced

(5)

Standard

Notes—
(a)

Sampling at the frequencies specified in this table for check monitoring is required only when the circumstances for this parameter in column (3) of Table 1 apply (see regulation 6(4)(b)). Where this is not the case, sampling at the frequencies specified in this table for audit monitoring is required instead.

(b)

Subject to note (e), samples for this parameter may, to the extent authorised under regulation 8 for a water supply zone, be taken from alternative supply points in accordance with regulation 9(1)(b).

(c)

Only those pesticides which are likely to be present in a given supply need to be monitored.

(d)

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.

(e)

If sodium hypochlorite is added after water has left a treatment works in the water supply zone, monitoring for this parameter must be carried out at sampling points (rather than at supply points).

Subject to check monitoring
1.Coliform bacteria< 1004
2.Escherichia coli≥10012 per 5,000
3.Residual disinfectantpopulation(d)
4.Aluminium(a)< 10012
5.Ammonium100-4,99924
6.Clostridium perfringens (including spores)(a) (b)5,000-9,999612
10,000-29,9991224
7.Colony count30,000-49,9991836
8.Colour50,000-79,9992652
9.Conductivity(b)80,000-100,0003876
10.Hydrogen ion
11.Iron(a)
12.Manganese(a)
13.Nitrate(a)
14.Nitrite(a)
15.Odour
16.Taste
17.Turbidity
Subject to audit monitoring
18.Antimony< 1001
19.Arsenic100-4,9994
20.Benzene(b)5,000-100,0008
21.Benzo(a)pyrene
22.Boron(b)
23.Bromate(b) (e)
24.Cadmium
25.Chloride(b)
26.Chromium
27.Copper
28.Cyanide(b)
29.1,2-dichloroethane(b)
30.Enterococci
31.Fluoride(b)
32.Lead
33.Mercury(b)
34.Nickel
35.Pesticide(b) (c)
36.PAH: Total
37.Selenium
38.Sodium
39.Sulphate(b)
40.

Tetrachloroethene and

Trichloroethene(b)

41.Tetrachloromethane(b)
42.THM: Total
43.Total organic carbon(b)
44.Indicative dose—
Gross alpha(b)
Gross beta(b)
45.Tritium(b)

TABLE 3

ANNUAL SAMPLING FREQUENCIES: SUPPLY POINTS(2)

(1)

Item

(2)

Parameter

(3)

Volume of water

supplied m3/d

(4)

Reduced

(5)

Standard

Notes—
(a)

Sampling at the frequencies specified in this table for check monitoring is required only where the water originates from, or is influenced by, surface waters (see Table 1). Where this is not the case, sampling at the frequencies specified in this table for audit monitoring is required instead.

(b)

If sodium hypochlorite is added after water has left a treatment works in the water supply zone, audit monitoring for this parameter must be carried out at sampling points (rather than at supply points).

(c)

Only those pesticides which are likely to be present in a given supply need to be monitored.

Subject to check monitoring
1.Clostridium perfringens (including spores)(a)< 202
20-99924
2.Conductivity1,000-1,999612
2,000-5,9991224
6,000-9,9991836
10,000-15,9992652
16,000-32,99952104
33,000-49,99978156
50,000-67,999104208
68,000-84,999130260
85,000-101,999156312
102,000-119,999183365
120,000-241,999365730
242,000-484,9997301,460
485,000-728,9991,0952,190
Subject to audit monitoring
3.Benzene< 201
4.Boron20-9994
5.Bromate(b)1,000-49,9998
6.Chloride50,00-89,99912
7.Cyanide90,000-299,99924
8.1,2-dichloroethane300,000-649,99936
9.Fluoride≥ 650,00048
10.Mercury
11.Pesticide(c)
12.Sulphate
13.

Tetrachloroethene and

Trichloroethene

14.Tetrachloromethane
15.Total organic carbon
16.Indicative dose—
Gross alpha
Gross beta
17.Tritium

TABLE 4

ANNUAL SAMPLING FREQUENCIES: TREATMENT WORKS(3)

(1)

Item

(2)

Parameter

(3)

Volume of water

supplied m3/d

(4)

Reduced

(5)

Standard

Notes—
(a)

Sampling at the frequencies specified in this table for check monitoring is required only when chloramination is practised. When this is not the case, this parameter must be sampled instead at the frequencies specified in this table for audit monitoring.

Subject to check monitoring
1.Coliform bacteria< 204
2.Colony count20-1,9991252
3.Escherichia coli2,000-5,99952104
4.Residual disinfectant

6,000-11,999

≥12,000

104

208

208

365

5.Nitrite(a)< 202
6.Turbidity20-99924
1,000-1,999612
2,000-5,9991224
6,000-9,9991836
10,000-15,9992652
16,000-32,99952104
33,000-49,99978156
50,000-67,999104208
68,000-84,999130260
85,000-101,999156312
102,000-119,999183365
120,000-241,999365730
242,000-484,9997301,460
485,000-728,9991,0952,190
Subject to audit monitoring
7.Nitrite(a)< 201
20-9994
1,000-49,9998
50,000-89,99912
90,000-299,99924
300,000-649,99936
≥650,00048

In this Schedule “Indicative dose”, “Pesticide”, “PAH: Total”, “Tetrachloroethene and Trichloroethene” and “THM: Total” have the same meanings as they have in Schedule 1.

(1)

This table specifies the number of samples to be taken at sampling points for the purposes of regulation 9(1)(a) and (2).

(2)

This table specifies the number of samples to be taken at supply points for the purposes of regulation 9(1)(b) and (2).

(3)

This table specifies the number of samples to be taken at treatment works for the purposes of regulation 11.

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