The Private Water Supplies (England) Regulations 2016

PART 2 U.K. Analytical methods

Table 1

Prescribed methods of analysis

Parameter	Method
Clostridium perfringens (including spores)	[F1 BS-EN ISO 14189]
Coliform bacteria and [F2 E. coli]	BS-EN ISO 9308-1 and BS-EN ISO 9308-2
Colony count 22°C-enumeration of culturable microorganisms	BS-EN ISO 6222
Colony count 37°C-enumeration of culturable microorganisms	BS-EN ISO 6222
Enterococci	BS-EN ISO 7899-2
Pseudomonas aeruginosa	[F3 BS-EN ISO 16266]

Textual Amendments

F1 Words in Sch. 3 Pt. 2 substituted (11.7.2018) by The Private Water Supplies (England) (Amendment) Regulations 2018 (S.I. 2018/707), regs. 1(1), 2(11)(c)(i) (with reg. 3)

F2 Words in Sch. 3 Pt. 2 substituted (11.7.2018) by The Private Water Supplies (England) (Amendment) Regulations 2018 (S.I. 2018/707), regs. 1(1), 2(11)(c)(ii) (with reg. 3)

F3 Words in Sch. 3 Pt. 2 substituted (11.7.2018) by The Private Water Supplies (England) (Amendment) Regulations 2018 (S.I. 2018/707), regs. 1(1), 2(11)(c)(iii) (with reg. 3)

F4 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Textual Amendments

F4 Sch. 3 Pt. 2 unnumbered table omitted (11.7.2018) by virtue of The Private Water Supplies (England) (Amendment) Regulations 2018 (S.I. 2018/707), regs. 1(1), 2(11)(d)(i) (with reg. 3)

F5 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Textual Amendments

F5 Sch. 3 Pt. 2 Table 2 omitted (11.7.2018) by virtue of The Private Water Supplies (England) (Amendment) Regulations 2018 (S.I. 2018/707), regs. 1(1), 2(11)(d)(ii) (with reg. 3)

[F6 Table 3

Minimum performance characteristic: uncertainty of measurement

Parameters	Uncertainty of measurement % of the parametric value (except for pH) (1)
(1) “Uncertainty of measurement” is a non-negative parameter characterising the dispersion of the quantity values being attributed to a measurement, based on the information used. The performance criterion for measurement uncertainty (k = 2) is the percentage of the parametric value stated in the table or better. Measurement uncertainty must be estimated at the level of the parametric value.
(2) If the value of uncertainty of measurement cannot be met, the best available technique must be selected (up to 60% of the parametric value).
(3) The method determines total cyanide in all forms.
(4) Reference method: European standard EN ISO 8467 entitled “Water quality - Determination of permanganate index (ISO 8467:1993).
(5) The performance characteristics for individual pesticides are given as an indication. Values for the uncertainty of measurement as low as 30% can be achieved for several pesticides, higher values up to 80% may be allowed for a number of pesticides.
(6) The performance characteristics apply to individual substances, specified at 25% of the parametric value in Part 1 of Table B in Part 1 of Schedule 1.
(7) The performance characteristics apply to individual substances, specified at 50% of the parametric value in Part 1 of Table B in Part 1 of Schedule 1.
(8) The uncertainty of measurement must be estimated at the level of 3 mg/l of the total organic carbon (TOC) in accordance with European standard EN 1484 entitled “Water analysis - Guidelines for the determination of total organic carbon and dissolved organic carbon” and dissolved organic carbon (DOC) must be used.
(9) The uncertainty of measurement must be estimated at the level of 1.0 nephelometric turbidity units (NTU) in accordance with European standard EN ISO 7027-1 entitled “Water quality - Determination of turbidity - Part 1: Quantitative methods (ISO 7027-1:2016”.]
Aluminium	25
Ammonium	40
Antimony	40
Arsenic	30
Benzene	40
Benzo(a)pyrene (2)	50
Boron	25
Bromate	40
Cadmium	25
Chloride	15
Chromium	30
Colour	20
Conductivity	20
Copper	25
Cyanide (3)	30
1,2-dichloroethane	40
Fluoride	20
Hydrogen ion concentration pH (expressed in pH units)	0.2
Iron	30
Lead	25
Manganese	30
Mercury	30
Nickel	25
Nitrate	15
Nitrite	20
Oxidisability (4)	50
Pesticides (5)	30
Polycyclic aromatic hydrocarbons (6)	50
Selenium	40
Sodium	15
Sulphate	15
Tetracloroethene (7)	30
Tetracloromethane	30
Trichloroethene (7)	40
Trihalomethanes: total (6)	40
Total organic carbon (8)	30
Turbidity (9)	30

Textual Amendments

F6 Sch. 3 Pt. 2 Table 3 inserted (11.7.2018) by The Private Water Supplies (England) (Amendment) Regulations 2018 (S.I. 2018/707), regs. 1(1), 2(11)(e) (with reg. 3)