IWNL (Independent Water Networks Ltd)

Report Data Range: For the whole year 2021

Table 9: Quality of water at consumer’s tap (zones) – European Standards

Parameter Name	Parameter Code	Prescribed Concentration or Value	Total Number of Tests	Tests Failed	1 Percentile (representing a minimum)	99 Percentile (representing a maximum)	No. of zones failing standard
1 2-Dichloroethane (Total)	F001	3 µg/l	101	0	<0.16	<0.16	0
Antimony	B008A	5 µg Sb/l	117	0	0.0218	0.5264	0
Arsenic (Total)	B001A	10 µg As/l	117	0	0.0918	1.9064	0
Benzene (Total)	F002	1 µg/l	101	0	<0.06	<0.09	0
Benzo[a]Pyrene (Total)	D007	0.01 µg/l	101	0	<0.00057	<0.000962	0
Boron	D005A	1 mg B/l	117	0	0.0101198	0.12732	0
Bromate	F003	10 µg BrO3/l	117	0	<0.15	5.36	0
Cadmium (Total)	B002	5 µg Cd/l	117	0	<0.01	0.3782	0
Chromium (Total)	B004	50 µg Cr/l	117	0	<0.04	5.753	0
Copper (Total)	A024A	2 mg Cu/l	117	0	<0.00049	0.53134	0
Cyanide (Total)	B003	50 µg CN/l	117	0	<1.2	<12.47	0
E coli (faecal coliforms Confirmed)	C002	0 number/100 ml	311	0	0	0	0
Enterococci (Confirmed)	C003	0 number/100 ml	111	0	0	0	0
Fluoride (Total)	A027	1.5 mg F/l	117	0	<0.0418	1.1722	0
Lead (10 – will apply 25.12.2013)	B007B	10 µg Pb/l	117	0	<0.04	3.2464	0
Mercury (Total)	B005	1 µg Hg/l	117	0	<0.06	<0.06	0
Nickel (Total)	B006A	20 µg Ni/l	117	2	<0.2106	65.26	2
Nitrate (Total)	A012	50 mg NO3/l	116	0	<2.11	43.558	0
Nitrite – Consumer’s Taps	A013A	0.5 mg NO2/l	116	0	0.00034	0.12267	0
Nitrite/Nitrate formula	A013C	1 mg/l	116	0	0	0.8715	0
Pesticides (Total by Calculation)	B010	0.5 µg/l	58	0	0	0.065	0
Pesticides Metaldehyde	P226	0.1 µg/l	58	0	<0.007	0.055	0
Polycyclic Aromatic Hydrocarbons (Total by Calculation)	B011F	0.1 µg/l	101	0	0	0.0698	0
Radon	F101	100 Bq/l	30	0	<1.1	3.33	0
Selenium (Total)	B009	10 µg Se/l	117	0	<0.08	1.9906	0
Trichloroethene & Tetrachloroethene – Sum Of 2 Substances (Total by Calculation)	D009B	10 µg/l	101	0	0	0.4802	0
Trihalomethanes (Total by Calculation)	D011	100 µg/l	101	0	2.8158	68.8084	0
Totals			3,043	2

Table 10: Quality of water at consumer’s tap (zones) – National Standards

Parameter Name	Parameter Code	Prescribed Concentration or Value	Total Number of Tests	Tests Failed	1 percentile (representing a minimum)	99 percentile (representing a maximum)	No. of zones failing standard
Aluminium (Total)	A021	200 µg Al/l	117	0	<6.9	141.01	0
Colour	A001	20 mg/l Pt/Co	128	0	<2.9	<8.68	0
Iron (Total)	A022	200 µg Fe/l	117	0	<3.72	164.28	0
Manganese (Total)	A023	50 µg Mn/l	117	0	<0.3	9.6134	0
Odour	A003	0 Dilution number at 25°C	129	0	0	0	0
Sodium (Total)	A009	200 mg Na/l	117	0	3.9636	77.402	0
Taste (Taste Quant)	A004	0 Dilution number at 25°C	128	0	0	0	0
Tetrachloromethane (Total)	D008	3 µg/l	101	0	<0.13	<0.2286	0
Turbidity	A002	4 NTU	128	1	<0.13	4.2587	1
Totals			1,082	1

Table 11: Quality of water at consumer’s tap (zones) – Additional Monitoring Requirements

Parameter Name	Parameter Code	Prescribed Concentration or Value	Total Number of Tests	Tests exceeding specification	1 percentile (representing a minimum)	99 percentile (representing a maximum)
Ammonium (Total)	A014	0.5 mg NH4/l	128	0	<0.008	0.23423
Chloride	D002A	250 mg Cl/l	128	0	7.116	95.524
Clostridum Perfringens (Sulphite-reducing Clostridia) (Confirmed)	C004A	0 number/100 ml	129	0	0	0
Coliform Bacteria (Indicator)	C001A	0 number/100 ml	310	3	0	1
Colony Counts After 3 Days At 22øc (Colony Counts)	C007	No abnormal change	128	N/A	0	210
Colony Counts After 48 Hours At 37øc (Colony Counts)	C013	No abnormal change	1	N/A	1	1
Conductivity (Electrical Conductivity)	D001	2500 µS/cm at 20°C	128	0	154.03	930.21
Gross Alpha	F004	0.1 Bq/l	34	0	<0.012	0.093
Gross Beta	F005	1 Bq/l	34	0	0.013	0.261
Hydrogen ion (pH) – Indicator (Hydrogen ion) (pH)	A006	6.5 – 9.5 pH Value	128	0	6.8567	8.3908
Residual Disinfectant – Free	C009	No abnormal change	314	N/A	0.02	0.7325
Residual Disinfectant – Total	C010	No abnormal change	314	N/A	0.1	0.9885
Sulphate	A007	250 mg SO4/l	128	0	9.3098	195.07
Total Organic Carbon	A017	No abnormal change	128	N/A	<0.7	4.2927
Tritium	F006	100 Bq/l	25	0	<5.6	<10
Totals			2,057	3