Brussels: 100 microT for long-term exposure; 1,000 microT for short-time exposure; 0.4-10 microT for long-term exposure only for new transformers in all places where children below 15 years of age may stay more than 6 hours // Flanders: Intervention value of 10 microT, and goal value of 0.2 microT to be respected in indoor environments // Walonia: 100 microT, each project requiring an environmental permit is studied independently and further limits may be imposed if necessary.