1.—(1) The Department must monitor for a Group A parameter in accordance with this Part.
(2) “Monitoring for a Group A parameter” means sampling for—
(a)each parameter listed in column 1 of Table 1 of this Schedule in the circumstances listed in the entry which corresponds with that parameter in column 2 of Table 1 of this Schedule; and
(b)any other parameter which may be identified as relevant by the Department in the monitoring programme.
1 A supply which consists of both groundwater and surface water shall be deemed to be a supply which consists only of surface water. | |
| (1) Parameter | (2) Circumstances |
|---|---|
| Aluminium1 | If used as water treatment chemicals or where the water originates from, or is influenced by, surface waters |
| Ammonium | Where chloramination is practised |
| Coliform bacteria | In all supplies |
| Colony Counts | In all supplies |
| Colour | In all supplies |
| Conductivity | In all supplies |
| Disinfectant residual | When disinfection treatment is practised |
| Escherichia coli (E. coli) | In all supplies |
| Indicative Dose | Where there is treatment in place to reduce the level of radionuclides in water intended for human consumption. |
| Iron1 | If used as water treatment chemicals or where the water originates from, or is influenced by, surface waters |
| Manganese1 | Where the water originates from, or is influenced by, surface waters |
| Nitrite | Where chloramination is practised |
| Odour | In all supplies |
| pH (Hydrogen ion) | In all supplies |
| Radon | Where there is treatment in place to reduce the level of radionuclides in water intended for human consumption. |
| Taste | In all supplies |
| Tritium | Where there is treatment in place to reduce the level of radionuclides in water intended for human consumption. |
| Turbidity | In all supplies |
2.—(1) Sampling for a Group A parameter which is not a radioactive substance must be undertaken at the frequencies specified in Table 2 for those parameters.N.I.
(2) Sampling for a Group A parameter which is a radioactive substance must be undertaken at the frequencies specified in Table 3 for those parameters.
| Volume m3/day(calculated as averages taken over a calendar year) | Sampling frequency per year |
|---|---|
| ≤10 | 1 |
| > 10 ≤ 100 | 2 |
| > 100 ≤ 1,000 | 4 |
| > 1,000 ≤ 2,000 | 10 |
| > 2,000 ≤ 3,000 | 13 |
| > 3,000 ≤ 4,000 | 16 |
| > 4,000 ≤ 5,000 | 19 |
| > 5,000 ≤ 6,000 | 22 |
| > 6,000 ≤ 7,000 | 25 |
| > 7,000 ≤ 8,000 | 28 |
| > 8,000 ≤ 9,000 | 31 |
| > 9,000 ≤ 10,000 | 34 |
| > 10,000 | 4 + 3 for each 1,000 m3/day of the total volume (rounding up to the nearest multiple of 1,000 m3/day) |
| Volume m3 /day (calculated as averages taken over a calendar year) | Sampling frequency per year |
|---|---|
| ≤ 1000 | 1 |
| > 1000 ≤ 10,000 | 1 + 1 for each 3,300 m3/day of the total volume (rounding up to the nearest multiple of 3,300 m3/day) |
| > 10,000 ≤ 100,000 | 3 + 1 for each 10,000 m3/day of the total volume (rounding up to the nearest multiple of 10,000 m3/day) |
| > 100,000 | 10 + 1 for each 25,000 m3/day of the total volume (rounding up to the nearest multiple of 25,000 m3/day) |