Parameter | Procedure | Permissible limit for drinking water by NABL |
TDS | IS 3025 (PART 16) [8] 1984 | 500 mg/L |
Total Hardness | IS 3025 (PART 21) [9] 2009 | 200 mg/L |
Conductivity | IS 3025 (PART 14) [10] 1984 | Not specified |
E. coli | IS 15185: 2016 [11] | absent |
Total coliforms | IS 15185: 2016 [11] | absent |
Total organic C | IS 3025 (Part 18) [12] 1984 | Test not included in IS 10500 |