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- Original (As made)
This is the original version (as it was originally made).
Part IV
(1) | (2) | (3) |
---|---|---|
Item | Parameter | Circumstances |
1. | Aluminium | – When 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 counts | |
6. | Colour | |
7. | Conductivity | |
8. | Escherichia coli (E. Coli) | |
9. | Hydrogen ion | |
10. | Iron | – When used as flocculant or where the water originates from, or is influenced by, surface waters |
11. | Manganese | – Where the water originates from, or is influenced by, surface waters |
12. | Nitrate | – When chloramination is practised |
13. | Nitrite | – When chloramination is practised |
14. | Odour | |
15. | Taste | |
16. | Turbidity |
(1) | (2) | (3) | (4) |
---|---|---|---|
Substances and parameters subject to check monitoring | Estimated population of water supply zone | Reduced | Standard |
Notes: | |||
+ See regulation 6(2) and Table 1 in Schedule 3. | |||
* Sampling for these parameters may be within water supply zones or at supply points as specified in Table 3, subject to notes (ii) and (iii) below. | |||
(i) Where the population is not an exact multiple of 5000, the population figure should be rounded up to the nearest multiple of 5000. | |||
(ii) 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. | |||
(iii) To monitor for total indicative dose (for radioactivity). | |||
E.Coli | <100 | 4 | |
Coliform bacteria Residual disinfectant | ≥100 | 12 per 5000 population(i) | |
Aluminium* | |||
Ammonium | |||
Clostridium perfringes (including spores)*(i) | |||
Colony counts | <100 | 1 | 2 |
Colour | 100 – 4,999 | 2 | 4 |
Conductivity* | 5,000 – 9,999 | 6 | 12 |
Hydrogen ion | 10,000 – 29,999 | 12 | 24 |
Iron+ | 30,000 – 49,999 | 18 | 36 |
Manganese+ | 50,000 – 79,999 | 26 | 52 |
Nitrate+ | 80,000 – 100,000 | 38 | 76 |
Nitrite+ | |||
Odour | |||
Taste | |||
Turbidity | |||
Parameters subject to audit monitoring | |||
Antimony | |||
Arsenic | |||
Benzene* | |||
Benzo(a)pyrene | |||
Boron* | |||
Bromate(ii)* | |||
Cadmium | |||
Chromium | <100 | 1 | |
Copper | 100 – 4,999 | 4 | |
Cyanide* | 5,000 – 100,000 | 8 | |
1, 2 dichloroethane* | |||
Enterococci | |||
Flouride* | |||
Lead | |||
Mercury* | |||
Nickel | |||
Pesticides* | |||
PAH | |||
Selenium | |||
Sodium | |||
Trichloroethene/Tetrachloroethene* | |||
Tetrachloromethane* | <100 | 1 | |
THM | 100 – 4,999 | 4 | |
Chloride* | 5,000 – 100,000 | 8 | |
Sulphate* | |||
Total Organic Carbon* | |||
Tritium* | |||
Gross alpha(iii)* | |||
Gross beta(iii)* |
(1) | (2) | (3) | (4) | (5) |
---|---|---|---|---|
Item | Substances and parameters subject to check monitoring | Volume of water supplied m3/d | Reduced | Standard |
Notes: | ||||
(i) Check monitoring is required only in respect of surface waters (see regulation 6(2) and Table 1 in Schedule 3), otherwise audit monitoring. | ||||
(ii) 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. | ||||
(iii) To monitor for total indicative dose (for radioactivity). | ||||
1. | Clostridium perfringens (including spores)(i) | <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 | ||
Parameters subject to audit monitoring | ||||
3. | Benzene | |||
4. | Boron | |||
5. | Bromate(ii) | |||
6. | Cyanide | |||
7. | 1,2 dichloroethane | |||
8. | Fluoride | <20 | 1 | |
9. | Mercury | 20 – 999 | 4 | |
10. | Pesticides | 1,000 – 49,999 | 8 | |
11. | Trichloroethene/Tetrachloroethene | 50,000 – 89,999 | 12 | |
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 alpha(iii) | |||
18. | Gross beta(iii) |
(1) | (2) | (3) | (4) | (5) |
---|---|---|---|---|
Item | Substances and parameters subject to check monitoring | Volume of water supplied m3/d | Reduced | Standard |
Notes: | ||||
(i) check monitoring at treatment works is required only when chloramination is practised. In other circumstances, audit monitoring is required. | ||||
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. | Nitrite(i) | <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 | ||
Substances and parameters subject to audit monitoring | ||||
7. | Nitrite(i) | <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 |
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