# The Private Water Supplies (Scotland) Regulations 2006, Part Table C: Indicator parameters


Directive requirements
(1)Item
(2)Parameters
(3)Concentration or Value (maximum unless otherwise stated) or State
(4)Units of Measurement
1.
Ammonium
0.50
mgNH4/l
2.
Chloride(i)
250
mgC1/1
3.
Clostridium perfringens (including spores)
0
Number/100 ml
4.
Coliform bacteria
0
Number/100 ml
5.
Colony count
No abnormal change
Number/1 ml at 22°C
5A
Colour
Acceptable to consumers and no abnormal change
6.
Conductivity(i)
2500
µS/cm at 20°C
6A
Hydrogen ion
9.5
6.5 (minimum)
pH value
6B
Odour
Acceptable to consumers and no abnormal change
6C.
Radon (for radioactivity)(ii)
100
Bq/l
7.
Sulphate(i)
250
mgSO4/l
7A
Taste
Acceptable to consumers and no abnormal change
8.
Total indicative dose (for radioactivity)...
0.10
mSv...
9.
Total organic carbon (TOC)
No abnormal change
mgC/l
10.
Tritium (for radioactivity) (iii)
100
Bq/l
10A
Turbidity
Acceptable to consumers and no abnormal change

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Source: https://www.legislation.gov.uk/ssi/2006/209/schedule/1/part/3 (the official version)
Page: https://openlegislation.uk/private-water-supplies-scotland-regulations-2006/schedule-1/part-3
Contains public sector information licensed under the Open Government Licence v3.0. Source: legislation.gov.uk, The National Archives.