Water Protection Leaders in Ukraine: Post-Kakhovka Response, WASH Programs

Access to safe water — normally an unremarkable background condition of civilized life — became a recurring acute crisis in wartime Ukraine. Russia's deliberate targeting of civilian water infrastructure, through direct military strikes on water treatment facilities and pumping stations, created emergencies in Mariupol (where the Russian siege cut water supply entirely as part of a broader starvation strategy), Mykolaiv (where the water supply was contaminated and then cut for months), Kherson (occupied and liberated), and dozens of other communities. The destruction of the Kakhovka dam in June 2023 created the largest single water security catastrophe of the war — affecting the drinking water supply, agricultural irrigation, and industrial cooling for millions of people across the Kherson, Mykolaiv, Dnipropetrovsk, and Zaporizhzhia regions, while simultaneously contaminating the Dnipro river and Black Sea with an unprecedented pulse of pollutants.

Kyiv Vodokanal and Municipal Water Authorities

Ukraine's water supply is managed primarily by municipal Vodokanal (water utility) companies. The largest, Kyiv Vodokanal, operates the capital's water treatment plants and distribution network — a system under sustained pressure throughout the war as missile and drone attacks damaged electrical supply to pumping stations, required emergency repairs to damaged infrastructure, and forced repeated public advisories about boiling water. Kyiv Vodokanal engineers worked under blackout conditions during winter 2022-23 using backup generators, repaired damage rapidly after strikes, and implemented emergency water distribution points throughout the city. Similar stories with considerably fewer resources played out in Kharkiv, Zaporizhzhia, Mykolaiv, and dozens of smaller cities. Mykolaiv was particularly affected — with Russian forces having damaged the canal supplying the city with Dnipro River water before liberation, forcing the city to rely on emergency bottled water and tanker deliveries for months.

Kakhovka Dam Collapse: Immediate Response

When the Kakhovka dam failed on 6 June 2023, the immediate water security response required simultaneous action across multiple crises. Downstream communities faced acute flooding — requiring evacuation rather than water supply. But the medium-term crisis was the loss of the reservoir as a freshwater source: the Kakhovka reservoir had supplied drinking water to Kherson, Zaporizhzhia, Dnipropetrovsk, and Mykolaiv regions, and supplied the Crimea canal. Emergency water delivery operations used tanker trucks as the primary mechanism to supplement compromised water systems in affected areas. OCHA, UNICEF, and USAID WASH teams coordinated international humanitarian response alongside Ukrainian government agencies and Vodokanal authorities.

Water Security Response Framework

Dnipro River Contamination

The Kakhovka dam's breach released not just water but a concentrated flow of contaminants accumulated in the reservoir sediments — agricultural pesticides and fertilizers from farming in the reservoir's catchment area, unexploded ordnance and military debris from fighting in the surrounding region, fuel and lubricants from military equipment at the dam site, and industrial waste from the flooded industrial zone. Monitoring of Dnipro river water quality downstream detected elevated levels of nitrates, heavy metals, and biological contamination in the weeks after the breach. The Black Sea received this contamination pulse at the Dnipro estuary — affecting the ecology of Ukraine's only sea coast and raising long-term concerns about the Black Sea ecosystem already stressed by previous agricultural runoff.

Zaporizhzhia Nuclear Plant Water Supply

The Kakhovka reservoir was the primary coolant water source for the Zaporizhzhia Nuclear Power Plant — Europe's largest nuclear facility, occupied by Russian forces since March 2022. The reservoir's loss created immediate concern about the plant's ability to maintain adequate cooling for its reactors and spent fuel pools. IAEA monitoring teams on-site tracked water levels in the plant's alternative cooling pond and in emergency backup systems. In the months after the dam collapse, the plant's cooling situation remained stable due to the on-site retention pond — but IAEA Director General Rafael Grossi repeatedly warned that the safety margins had narrowed and that the nuclear safety situation at ZNPP remained precarious throughout the post-Kakhovka period.

Frequently Asked Questions

How many Ukrainians lost access to safe water due to the war?

UNICEF and OCHA estimates at various points in the war placed the number of Ukrainians without adequate access to safe drinking water at 5-6 million people. This figure fluctuated significantly as the military situation changed — with some communities gaining access as infrastructure was repaired, and others losing access as new attacks damaged systems. The problem is not uniform: some areas faced periodic disruptions due to power outages affecting pumping, while others faced complete destruction of water infrastructure that required months of reconstruction. Communities near the front line and in occupied territories faced the most severe and prolonged water access problems.

What happened to Mykolaiv's water supply?

Mykolaiv's water supply was severely disrupted early in the war when Russian forces damaged the canal bringing Dnipro River water to the city. The city of approximately 500,000 people was forced to rely on groundwater sources that had elevated levels of salt and other minerals — not immediately dangerous but causing health concerns for vulnerable populations and damaging appliances — as well as emergency water deliveries. After Ukrainian forces recaptured the surrounding territory and pushed Russian forces away from Kherson in November 2022, restoration of the water infrastructure became a priority. Significant international funding from the EU, US, and Nordic countries supported repair of Mykolaiv's water system throughout 2023-2024.

How does water contamination affect health in war zones?

Disrupted water and sanitation systems in conflict zones create multiple disease risks. Contaminated drinking water causes diarrheal diseases — a leading cause of child mortality — and can transmit cholera, typhoid, and hepatitis A. Ukraine conducted active epidemiological surveillance for waterborne disease outbreaks throughout the war, with UNICEF and WHO support. While major outbreak control was largely maintained in Ukrainian government-controlled territory, conditions in occupied areas and areas near the front line were far harder to monitor and likely experienced higher rates of waterborne illness. WHO Ukraine country office maintained disease reporting systems and provided medical countermeasures.

Who coordinates WASH response in Ukraine?

The WASH Cluster — a humanitarian coordination mechanism within the UN-led response architecture — coordinates water, sanitation, and hygiene (WASH) activities in Ukraine. UNICEF serves as the cluster lead, with OCHA managing broader humanitarian coordination. Under the cluster framework, international NGOs including Oxfam, Action Against Hunger, SOLIDAR, and others coordinate with each other and with Ukrainian government authorities to avoid duplication, cover geographic gaps, and standardize technical approaches. The cluster holds regular coordination meetings, maintains a shared database of activities and geographic coverage, and provides technical guidance for water system rehabilitation projects.

What long-term water infrastructure investments are needed?

Ukraine's post-war water infrastructure reconstruction agenda includes replacing or repairing hundreds of damaged water treatment plants, pumping stations, and distribution networks; building new alternative water supply routes for regions that depended on the Kakhovka reservoir; remediating Dnipro River contamination; and upgrading the country's water system to modern EU standards of efficiency and water quality. The World Bank and EU have included water infrastructure prominently in Ukraine reconstruction cost estimates — with preliminary figures suggesting investment requirements in the range of several billion euros for water and sanitation systems alone. These estimates will require revision based on the extent of damage in areas currently inaccessible due to occupation or active combat.

Sources

1. UNICEF Ukraine. WASH Situation Reports 2022–2024. unicef.org/ukraine, 2022–2024.
2. OCHA Ukraine. Humanitarian Response Plans and WASH Cluster Updates. unocha.org/ukraine, 2022–2024.
3. USAID Ukraine. Water and Sanitation Infrastructure Support Programs. usaid.gov/ukraine, 2022–2024.
4. IAEA. Zaporizhzhia Nuclear Power Plant Status Reports Post-Kakhovka. iaea.org, 2023–2024.
5. WHO Ukraine. Environmental Health and Waterborne Disease Surveillance. who.int/ukraine, 2022–2024.