If a company has ISO 14001 certificate, does it mean that the company is complying with all the relevant environmental laws and regulations?

Not necessarily. Since ISO 14001 standard requires that the company should make a commitment to comply with all the relevant laws and regulations only and not necessarily comply with them. Therefore, the standard is satisfied, if the company does not conform to all the legal regulations at that point of time but gives commitment to comply with laws and regulations at a later date. Based on this commitment, a company can get an ISO 14001 certificate.

Whether all the companies, who have got ISO 14001 certification in India are complying with all the relevant laws and regulations?

A scrutiny of the fifty ISO 14001 certified industries revealed that three each do not comply with regulations under the Water (Prevention and Control of Pollution) Act, 1974 and the Air (Prevention and Control of Pollution) Act, 1981 and 10 out of 43 do not comply with regulations related to management of Hazardous Substances Rules.