[en] Measurements of radon are important because the radiation dose to human population due to inhalation of radon and its progeny contribute more than 50% of the total dose from natural sources. In the present study radon monitoring has been carried out in refinery and nearby township at Panipat, Haryana using alpha sensitive LR-115 type II solid-state nuclear track detectors. The Equilibrium equivalent Concentration (EEC) of radon in environment of refinery varied from 19.23 to 105.57 Bq m^-3 with an average of 55.30 ± 5.94 Bq m^-3 while annual effective dose received by the workers varied from 0.33 mSv to 1.81 mSv with an average of 0.89 ± 0.10 mSv. The Equilibrium equivalent Concentration (EEC) of radon in township near refinery varied from 38.36 to 95.95 Bq m^-3 with an average of 61.18 ± 7.02 Bq m^-3 while annual effective dose received by the occupants varied from 1.65 mSv to 4.13 mSv with an average of 2.63 ± 0.30 mSv. (author)