| Substance | Threshold concentration (mg/l) | Maximum permissible concentration (mg/1) |
| Ammonia | 0.2–2.0 | 0.05 |
| DDT | 0.02–0.1 | absent |
| Calcium bisulphate | 30–60 | |
| Calcium chloride | 7 000–12 000 | |
| Potassium chloride | 700–5 200 | |
| Potassium sulphate | 800–1 000 | |
| Magnesium chloride | 5 000–15 000 | 20 |
| Magnesium nitrate | 10 000 | 15 |
| Magnesium sulphate | 30 000 | 50 |
| Manganese (nitrate, chloride, sulphate) | 75–200 | 5 |
| Copper (compounds) | 0.08–0.80 | 0.005 |
| Sodium bicarbonate | 5 000 | |
| Sodium carbonate | 200–500 | |
| Sodium chloride | 7 000–15 000 | |
| Cadmium | 3–20 | 0.003 |
| Oxone | 0.02 | |
| Mercury | 0.1–0.9 | |
| Rotenone | 0.01–0.012 | absent |
| Sulphides | 0.4–4.0 | 0.1 |
| Hydrogen sulphide | 1.0 | 0.1 |
| Iron (compounds) | 0.9–2.0 | 0.01 |
| Phenol | 6–17 | 0.0005 |
| Formaldehyde | 15–30 | |
| Tannin | 15 | 5 |
| Paraquinone | 0.1–10 | |
| Chlorine | 0.05–0.4 | absent |
| Carbolineum | 7 | |
| Zinc (compounds) | 0.1–2.0 | 0.005 |
1 Source: Liebmann, H., Handbuch der Frischwasser-und Abwasser-Biologie, München, 1960.
| January | |
| 31 | Arrival New Delhi |
| February | |
| 1 | Discussions on the travel programme to visit the five project states with Dr. V.D. Singh, Deputy Commissioner (FY) and Mr. T. Lal, Engineer, CPU, in the Ministry of Agriculture. |
| 2–6 | Madhya Pradesh |
| - field visits to the hatchery sites at Demar, Salud and Umrar. | |
| 7–14 | Orissa |
| - field visits to the hatchery sites at Chiplima, Binika, Saramanga, Bhanjanagar and Baya Sagar. | |
| 15–20 | West Bengal |
| - field visits to the hatchery sites at Manikpara, Jamunadighi, Paccamati-Mohalla and Egra Patna. | |
| 21–26 | Bihar |
| - field visits to the hatchery sites at Bhusaula Danapur, Raghopur Bakhari, Barwat Farm, Ashrari, Belgachni, Abdullapur and Khiriahi. | |
| 27–29 | Uttar Pradesh |
| - field visits to the hatchery sites at Gomatinagar, Pagla Bhari and Gujar Tal. | |
| March | |
| 1 | New Delhi |
| Arrival from field visits. Discussions with Dr. H.V. Henle, Deputy FAO Representative, Mr. A.L. Mendaritta, FAO Senior Programme Officer, and Dr. V.D. Singh, Deputy Commissioner (FY), Ministry of Agriculture. | |
| 2 | Meetings with Dr. P.V. Dehadrai, Commissioner (FY), Ministry of Agriculture, and Dr. R.G. Grimshaw, Chief, Agriculture Division, The World Bank, Resident Mission in India. |
| 3–4 | Report writing |
| 5–6 | Wrap-up meeting with the CPU, Ministry of Agriculture, and Dr. H.V. Henle, Deputy FAO Representative. |
| 7 | Departure for Calcutta to visit the Sundarban Development Project. |
