Atmospheric tritium activity was measured regularly around Kakrapar Atomic Power Station (KAPS) since gaseous waste which contains tritium is being released through a 100 m high stack at KAPS site. Data collected shows a large variation of ³H concentration in air, fluctuating in the range of ≤0.2–19.9 Bq.m^–3. Significantly, higher tritium levels were measured in samples at the site boundary (1.6 km) of KAPS compared to off-site locations. The atmospheric dilution factor was found to be in the range of 1.1.10–7–2.9.10–7 s.m^–3. The scavenging ratio of KAPS site was found to be varying from 0.4.10⁴ to 16.7.10⁴ (Bq.m^–3 rain water per Bq.m^–3 air). The inhalation dose to a member of general public at different distances (1.6–30 km) from KAPS site was found to be 0.07 μSv.y^–1.