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The Private Water Supplies Regulations 1991
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- UK Statutory Instruments
- 1991 No. 2790
- SCHEDULE 3
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Regulations 14 to 16
SCHEDULE 3SAMPLING FREQUENCIES FOR CLASSES A, B, 1 AND 2
| Sampling Frequency (number per annum) | Sampling Frequency (number per annum) | |||||
|---|---|---|---|---|---|---|
| Parameter | Class A and Class 1 | Class B and Class 2 | ||||
| Reduced | Standard | Increased | Reduced | Standard | Increased | |
| (1) | (2) | (3) | (4) | (5) | (6) | (7) |
Notes: (i) Increased or reduced sampling where permitted or required may be confined to the substance in question. (ii) The sum of the detected concentrations of fluoranthene, benzo 3.4 fluoranthene, benzo 11.12 fluoranthene, benzo 3.4 pyrene, benzo 1.12 perylene and indeno (1,2,3-cd) pyrene. | ||||||
| PART I: | ||||||
| Conductivity | 6 | 12 | 24 | 4 | 6 | 12 |
| Hydrogen ion | 6 | 12 | 24 | 4 | 6 | 12 |
| Odour (qualitative) | 6 | 12 | 24 | 4 | 6 | 12 |
| Taste (qualitative) | 6 | 12 | 24 | 4 | 6 | 12 |
| PART II: | ||||||
| Odour (quantitative) | — | 4 | 24 | — | 4 | 12 |
| Taste (quantitative) | — | 4 | 24 | — | 4 | 12 |
| Turbidity | — | 4 | 24 | — | 4 | 12 |
| Temperature | — | 4 | 24 | — | 4 | 12 |
| Nitrate | — | 4 | 24 | — | 4 | 12 |
| Nitrite | — | 4 | 24 | — | 4 | 12 |
| Ammonium | — | 4 | 24 | — | 4 | 12 |
| Iron | — | 4 | 24 | — | 4 | 12 |
| Aluminium | — | 4 | 24 | — | 4 | 12 |
| Manganese | — | 4 | 24 | — | 4 | 12 |
| Colour | — | 4 | 24 | — | 4 | 12 |
| PART III: | ||||||
| Trihalomethanes | 1 | 4 | 12 | 1 | 4 | 12 |
| Tetrachloromethanes | 1 | 4 | 12 | 1 | 4 | 12 |
| Trichloroethene | 1 | 4 | 12 | 1 | 4 | 12 |
| tetrachloroethene | 1 | 4 | 12 | 1 | 4 | 12 |
| Copper | 1 | 4 | 12 | 1 | 4 | 12 |
| Lead | 1 | 4 | 12 | 1 | 4 | 12 |
| Zinc | 1 | 4 | 12 | 1 | 4 | 12 |
| Pesticides and related prodcts(i) | 1 | 4 | 12 | 1 | 4 | 12 |
| Polycyclic aromatic hydrocarbons(ii) | 1 | 4 | 12 | 1 | 4 | 12 |
| PART IV: | ||||||
| Chloride | — | 1 | 12 | — | 1 | 12 |
| Sulphate | — | 1 | 12 | — | 1 | 12 |
| Calcium | — | 1 | 12 | — | 1 | 12 |
| Magnesium | — | 1 | 12 | — | 1 | 12 |
| Sodium | — | 1 | 12 | — | 1 | 12 |
| Potassium | — | 1 | 12 | — | 1 | 12 |
| Dry residues | — | 1 | 12 | — | 1 | 12 |
| Ozidizability (permanganatge value) | — | 1 | 12 | — | 1 | 12 |
| Total organic carbon | — | 1 | 12 | — | 1 | 12 |
| Boron | — | 1 | 12 | — | 1 | 12 |
| Surfactants | — | 1 | 12 | — | 1 | 12 |
| Phosphorus | — | 1 | 12 | — | 1 | 12 |
| Fluoride | — | 1 | 12 | — | 1 | 12 |
| Barium | — | 1 | 12 | — | 1 | 12 |
| Silver | — | 1 | 12 | — | 1 | 12 |
| Arsenic | — | 1 | 12 | — | 1 | 12 |
| Cadmium | — | 1 | 12 | — | 1 | 12 |
| Cyanide | — | 1 | 12 | — | 1 | 12 |
| Chromium | — | 1 | 12 | — | 1 | 12 |
| Mercury | — | 1 | 12 | — | 1 | 12 |
| Nickel | — | 1 | 12 | — | 1 | 12 |
| Antimony | — | 1 | 12 | — | 1 | 12 |
| Selenium | — | 1 | 12 | — | 1 | 12 |
| Total Hardness | — | 1 | 12 | — | 1 | 12 |
| Alkalinity | — | 1 | 12 | — | 1 | 12 |
| PART V: | ||||||
| Total coliforms | — | 24 | — | — | 12 | 24 |
| Faecal coliforms | — | 24 | — | — | 12 | 24 |
| Residual disinfectant | — | 24 | — | — | 12 | 24 |
| Colony counts | — | 24 | — | — | 12 | 24 |
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