Chemical Plant Risk Map Ukraine: Industrial Hazard Sites Under Wartime Threat

Ukraine's industrial geography — shaped by Soviet-era development of heavy chemical, metallurgical, and petrochemical production concentrated in the Donbas and eastern Ukraine — placed numerous large-scale chemical facilities in or near wartime combat zones. The destruction, occupation, or decommissioning of these facilities during the Russian invasion created significant environmental and public health hazard risks. Ammonia, chlorine, nitric acid, sulfuric acid, and heavy metals are among the tens of toxic or hazardous substances stored or processed at these facilities. International environmental monitoring organisations, led by the United Nations Environment Programme (UNEP) and its partner agencies, developed systematic monitoring and assessment programs for chemical hazard sites across Ukraine, recognising that the environmental and human health consequences of industrial damage could outlast immediate military impacts.

The Severodonetsk Chemical Complex

The most significant occupied chemical facility is the Azot chemical plant in Severodonetsk, Luhansk Oblast — one of Ukraine's largest nitrogen fertiliser production facilities, producing ammonia, ammonium nitrate fertiliser, and other nitrogen chemicals. The plant is located along the Siverskyi Donets River. During the battle for Severodonetsk in spring-summer 2022, the plant complex became a battleground, with Ukrainian defenders briefly using it as a fortified defensive position (mirroring the Azovstal steel plant in Mariupol). The plant was ultimately captured by Russian forces. Under occupation, the plant's chemical stocks, processing equipment, and waste containment infrastructure were at risk of uncontrolled release — ammonia and ammonium nitrate (a highly explosive compound when improperly handled) represent major accident hazards. Ukraine's government and UNEP documented concerns about the plant's status but monitoring access was impossible under occupation.

Key Chemical Hazard Sites by Region

Sumy Oblast: Border Proximity and Ammonia Pipeline

Sumy Oblast in northeastern Ukraine is notable for several overlapping chemical risk factors. The oblast borders Russia and Belarus, meaning it experienced ground incursion attempts in early 2022 and remains under consistent missile and drone attack. The Tolyatti-Odesa ammonia transit pipeline — a 2,480-km pipeline that historically transported ammonia from Russian chemical plants to the Black Sea export terminal at Yuzhne near Odesa — passed through Sumy Oblast. This pipeline was shut down following the Russian invasion, but residual ammonia in the pipeline sections within Ukraine represents a containment management challenge. Additionally, Sumy city has chemical manufacturing facilities, and previous Soviet-era industrial sites with soil and groundwater contamination in the area lie in a conflict-proximate environment where monitoring capacity is severely reduced.

UNEP Monitoring and Assessment Programs

UNEP deployed its Post-Crisis Environmental Assessment (PCEA) methodology to Ukraine — a framework previously used in Bosnia, Kosovo, the Gulf War, and Lebanon — to document and prioritise environmental hazard risks from war damage. Key UNEP Ukraine assessment activities included: satellite-based monitoring of industrial sites to detect visible damage, fire, or unusual activity; collection of air, water, and soil samples from accessible sites near damaged industrial facilities; production of a preliminary environmental damage assessment report (released in October 2022) documenting hundreds of incidents of industrial damage or potential releases; and development of a priority response list identifying the most urgent sites for containment, monitoring, and cleanup. UNEP's work was coordinated with Ukraine's Ministry of Environmental Protection and Natural Resources, which established a dedicated registry of environmentally damaged sites (the "Ecomonitor" database).

Mine Water and Acid Drainage: Donetsk Basin

An underappreciated long-term chemical hazard in the war zone is mine water management in the Donetsk coal basin. Underground coal mines require continuous pumping of groundwater to prevent flooding — a process that must continue even in facilities no longer producing coal. When mines are abandoned or damaged and pumping ceases, they flood with water that dissolves pyrite and other sulfide minerals in coal seams, producing acid mine drainage (AMD) — highly acidic, heavy-metal-laden water. Dozens of Donbas mines in occupied territory stopped pumping operations during the war. Flooded mines can create cross-mine water connections enabling AMD to migrate through aquifers and emerge at surface points distant from the mine. The Siverskyi Donets river basin — an important water source for both Ukraine and Russia's Rostov Oblast — is at long-term risk from Donbas mine drainage that could persist for decades after active military operations end.

Frequently Asked Questions

What is the downwind hazard zone for an ammonia release?

Ammonia (NH₃) released in a large industrial accident creates a toxic plume whose affected area depends on the quantity released, temperature, wind speed, and atmospheric stability conditions. For a major industrial facility release (hundreds to thousands of tonnes), toxic concentration zones can extend tens of km downwind. Emergency planning standards for hazardous ammonia facilities mandate evacuation planning for zones of at least 5–15 km under unfavourable conditions. Immediately dangerous to life and health (IDLH) concentrations of 300 ppm can occur within 1–2 km of a large uncontrolled release. The Tochka-based emergency response protocols for chemical accidents direct DSNS emergency responders to initiate immediate evacuation of downwind zones while deploying protection equipment.

What happened to the Tolyatti-Odesa ammonia pipeline?

Russia closed the Tolyatti–Odesa ammonia transit pipeline in the weeks preceding the February 2022 invasion. The pipeline, which transported approximately 2.5 million tonnes of ammonia annually from Russia's Tolyatti chemical plant to Odesa Oblast for export, was a significant revenue source for both Russian chemical producers and Ukraine (which charged substantial transit fees). Ukraine and Russia had ongoing negotiations about pipeline resumption as part of Black Sea grain deal discussions in 2022–2023, with Russia seeking ammonia pipeline restoration as a condition for grain corridor extension. The pipeline remained inactive throughout 2022–2024. Residual ammonia in Ukraine's pipeline section raised containment questions requiring technical management.

How does UNEP conduct satellite-based industrial hazard monitoring?

UNEP's satellite monitoring program for Ukraine used high-resolution commercial satellite imagery (from providers including Planet Labs, Maxar, and ESA Copernicus) to perform change detection analysis on industrial facilities. Before and after images of chemical plants, metal processing facilities, fuel storage sites, and waste repositories were compared to identify structural damage, fires, collapsed containment infrastructure, or unusual liquid releases visible from space (discolouration of adjacent water bodies or flood plains). Infrared and multi-spectral imagery provided additional information about thermal anomalies consistent with fires or chemical reactions. Satellite evidence was complemented by testimonial and media-derived reports of explosion or release events, and by post-access ground sampling where feasible following military clearance.

Are the Donetsk mines' pumping operations a priority for post-war reconstruction?

Yes — Ukrainian engineers and international environmental specialists have identified Donbas mine water management as one of the highest-priority long-term environmental recovery needs. The concern is that once mines are thoroughly flooded with acid-metal-laden water, reversing the contamination becomes extraordinarily expensive and technically challenging. Restarting pumping operations at mines in de-occupied territories as rapidly as possible would limit the volume of AMD-contaminated water built up, protecting surface and groundwater quality in the Siverskyi Donets basin over a multi-decade timeframe. Estimates of mine water remediation costs in the worst-case scenario (complete flooding of the Donbas basin) run into multiple billions of euros — costs that dwarf the operational cost of continuous pumping maintenance.

Is Ukraine a signatory to relevant chemical weapons and industrial hazard treaties?

Ukraine is a state party to the Chemical Weapons Convention (CWC), overseen by the Organisation for the Prohibition of Chemical Weapons (OPCW). Ukraine does not possess chemical weapons and has no declared CW stockpiles. The OPCW's mandate does not directly cover industrial chemical hazards, but Ukraine has engaged OPCW technical assistance in assessing whether any Russian strikes involved the use of chemical warfare agents (there were documented Ukrainian allegations of Russian use of riot-control agents/tear gas as chemical weapons, which OPCW investigated). For industrial chemical accident prevention and response, Ukraine is party to the UN ECE Helsinki Convention on Transboundary Industrial Accidents, relevant to cross-border hazard plume management with Poland, Slovakia, Hungary, Romania, and Moldova.

Sources

1. UNEP. Rapid Environmental Assessment of the Impacts of the War in Ukraine. Nairobi: United Nations Environment Programme, October 2022.
2. Ministry of Environmental Protection and Natural Resources of Ukraine. Environmental damage registry (Ecomonitor). Kyiv, 2022–2024.
3. OSCE Special Monitoring Mission to Ukraine. Environmental observations from the conflict zone in eastern Ukraine. Vienna: OSCE, 2021.
4. Mykhnenko, V. Donetsk Basin coal mines and acid mine drainage risk. Oxford: Environmental Science & Technology journal, 2021.
5. NATO Science for Peace and Security Programme. Ukraine industrial chemical hazard assessment. Brussels: NATO, 2022–2023.