Exclusion Zone

Verified Timeline

Lore & Background

The Exclusion Zone was established on 2 May 1986, when a Soviet government commission headed by Nikolai Ryzhkov decided on a 'rather arbitrary' area of a 30-kilometre (19 mi) radius from Reactor 4 as the designated evacuation area. The 30 km Zone was initially divided into three subzones: the area immediately adjacent to Reactor 4, an area of approximately 10 km (6 mi) radius from the reactor, and the remaining 30 km zone. Later in 1986, after updated maps of the contaminated areas were produced, the zone was split into three areas: the 'Black Zone' (over 200 μSv·h−1), to which evacuees were never to return; the 'Red Zone' (50–200 μSv·h−1), where evacuees might return once radiation levels normalized; and the 'Blue Zone' (30–50 μSv·h−1), where children and pregnant women were evacuated starting in the summer of 1986. Although evacuations were not immediate, 91,200 people were eventually evacuated from these zones. In February 1991, the law On The Legal Status of the Territory Exposed to the Radioactive Contamination resulting from the ChNPP Accident was passed, updating the borders of the Exclusion Zone and defining obligatory and voluntary resettlement areas. In 1997, the areas of Poliske and Narodychi were added to the existing area of the Exclusion Zone, which now encompasses an area of approximately 2,600 km2 (1,000 sq mi).

In Their Own Story

Historically and geographically, the zone is the heartland of the Polesia region. This predominantly rural woodland and marshland area was once home to 120,000 people living in the cities of Chernobyl and Pripyat as well as 187 smaller communities, but is now mostly uninhabited. All settlements remain designated on geographic maps but marked as нежил. (nezhyl.) – 'uninhabited'. The woodland in the area around Pripyat was a focal point of partisan resistance during the Second World War, which allowed evacuated residents to evade guards and return into the woods. In the woodland near the Chernobyl Nuclear Power Plant stood the 'Partisan's Tree' or 'Cross Tree', which was used to hang captured partisans. The tree fell down due to age in 1996 and a memorial now stands at its location. Since the beginning of the Russian invasion of Ukraine in February 2022, the Chernobyl exclusion zone has been the site of fighting with neighbouring Russia, which captured Chernobyl on 24 February 2022. By April 2022, the Kyiv offensive failed and Russian military withdrew from the region. Ukrainian authorities continue to keep the exclusion zone closed to tourists, pending cessation of hostilities in the Russo-Ukrainian war.

Reader's Guide

The Exclusion Zone is managed by the State Agency of Ukraine of on Exclusion Zone Management of the State Emergency Service of Ukraine, while the power plant and its sarcophagus and the New Safe Confinement are administered separately. Public access to the exclusion zone is restricted in order to prevent access to hazardous areas, reduce the spread of radiological contamination, and conduct radiological and ecological monitoring activities. It has become a thriving sanctuary, with naturally diverse flora and fauna and some of the thickest forests in Ukraine, primarily due to the lack of human activity in the exclusion zone since 1986. In February 2019, it was revealed that talks were underway to re-adjust the exclusion zone's boundaries to reflect the declining radioactivity of its outer areas. In May 2025, it was reported that around 100 hectares of land in the Chernobyl exclusion zone had contamination drop to a level safe enough to allow farming to commence in those areas. Other areas of compulsory resettlement and voluntary relocation not part of the restricted exclusion zone exist in the surrounding areas and throughout Ukraine.

Did You Know?

• The Exclusion Zone was established on 2 May 1986, with a 'rather arbitrary' 30-kilometre radius decided by a commission headed by Nikolai Ryzhkov.
• The zone was initially split into three subzones: the 'Black Zone' (over 200 μSv·h−1), 'Red Zone' (50–200 μSv·h−1), and 'Blue Zone' (30–50 μSv·h−1).
• 91,200 people were eventually evacuated from the immediate zones, though evacuations were not immediate.
• The 'Partisan's Tree' or 'Cross Tree' near the Chernobyl Nuclear Power Plant was used to hang captured partisans during World War II; it fell down due to age in 1996.
• In May 2025, around 100 hectares of land in the Chernobyl exclusion zone had contamination drop to a level safe enough to allow farming to commence.

Origins and Evolution of Boundaries

The Exclusion Zone was established on 2 May 1986, when a Soviet government commission headed by Nikolai Ryzhkov decided on a 'rather arbitrary' area of a 30-kilometre (19 mi) radius from Reactor 4 as the designated evacuation area. The 30 km Zone was initially divided into three subzones: the area immediately adjacent to Reactor 4, an area of approximately 10 km (6 mi) radius from the reactor, and the remaining 30 km zone. Later in 1986, after updated maps of the contaminated areas were produced, the zone was split into three areas: the 'Black Zone' (over 200 μSv·h−1), to which evacuees were never to return; the 'Red Zone' (50–200 μSv·h−1), where evacuees might return once radiation levels normalized; and the 'Blue Zone' (30–50 μSv·h−1), where children and pregnant women were evacuated starting in the summer of 1991. In February 1991, the law On The Legal Status of the Territory Exposed to the Radioactive Contamination resulting from the ChNPP Accident was passed, updating the borders of the Exclusion Zone and defining obligatory and voluntary resettlement areas. In 1997, the areas of Poliske and Narodychi were added to the existing area of the Exclusion Zone, which now encompasses an area of approximately 2,600 km2 (1,000 sq mi). In February 2019, it was revealed that talks were underway to re-adjust the exclusion zone's boundaries to reflect the declining radioactivity of its outer areas.

Ecological Transformation and Scientific Interest

Today, the Chernobyl exclusion zone is one of the most radioactively contaminated areas on Earth and draws significant scientific interest for the high levels of radiation exposure in the environment. It has become a thriving sanctuary, with naturally diverse flora and fauna and some of the thickest forests in Ukraine, primarily due to the lack of human activity in the exclusion zone since 1986. Public access to the exclusion zone is restricted in order to prevent access to hazardous areas, reduce the spread of radiological contamination, and conduct radiological and ecological monitoring activities. The current area of approximately 2,600 km2 (1,000 sq mi) in Ukraine is where radioactive contamination is the highest. In May 2025, it was reported that around 100 hectares of land in the Chernobyl exclusion zone had contamination drop to a level safe enough to allow farming to commence in those areas.

Historical Context and Resettlement Legacy

Historically and geographically, the zone is the heartland of the Polesia region. This predominantly rural woodland and marshland area was once home to 120,000 people living in the cities of Chernobyl and Pripyat as well as 187 smaller communities, but is now mostly uninhabited. All settlements remain designated on geographic maps but marked as нежил. (nezhyl.) – 'uninhabited'. The woodland in the area around Pripyat was a focal point of partisan resistance during the Second World War, which allowed evacuated residents to evade guards and return into the woods. In the woodland near the Chernobyl Nuclear Power Plant stood the 'Partisan's Tree' or 'Cross Tree', which was used to hang captured partisans. The tree fell down due to age in 1996 and a memorial now stands at its location. Although evacuations were not immediate, 91,200 people were eventually evacuated from these zones. In March 1989, a 'Safe Living Concept' was created for people living in contaminated zones beyond the Exclusion Zone in Belarus, Ukraine, and Russia. In October 1989, the Soviet government requested assistance from the International Atomic Energy Agency (IAEA) to assess the 'Soviet Safe Living Concept' for inhabitants of contaminated areas. After Ukrainian Independence, funding for the policing and protection of the zone was initially limited, resulting in even further settling by samosely (returnees) and other illegal intrusion.

Modern Conflicts and Current Status

Since the beginning of the Russian invasion of Ukraine in February 2022, the Chernobyl exclusion zone has been the site of fighting with neighbouring Russia, which captured Chernobyl on 24 February 2022. By April 2022, the Kyiv offensive failed and Russian military withdrew from the region. Ukrainian authorities continue to keep the exclusion zone closed to tourists, pending cessation of hostilities in the Russo-Ukrainian war. Facilities at Chernobyl still require ongoing management, in part to ensure the continued cooling of spent nuclear fuel. An estimated 100 plant workers and 200 Ukrainian guards who were at the Chernobyl Nuclear Power Plant when the Russians arrived had been unable to leave. On 10 March 2022, the International Atomic Energy Agency stated that it had lost all contact with Chernobyl. On 22 March, the Ukrainian state agency responsible for the Chernobyl exclusion zone reported that Russian forces had destroyed a new laboratory at the Chernobyl Nuclear Power Plant. On 27 March, Lyudmila Denisova, then–Verkhovna Rada Commissioner for Human Rights, said that 31 known individual fires covering 10,000 hectares were burning in the zone.