CCB position on gas leaks from Nord Stream 1 and 2

CCB • September 30, 2022

The gas leak at Nord Stream 2 seen from the Danish F-16 interceptor on Bornholm. Photo: Danish Defence

Coalition Clean Baltic expresses serious concerns regarding factual massive release of greenhouse gas and other possible environmental consequences of the natural gas leakages that were detected by Danish and Swedish authorities from the Nord Stream 1 and 2 pipelines on 27-28 September 2022.


With the information available at this point and risk assessment from EIA Reports of both pipelines, presented under the Espoo Convention consultations, the full volume of gas, being contained in the damaged pipelines may be released into marine environment and atmosphere.


In the worst case scenario, given pipeline dimensions in the project description (internal diameter 1,153 mm, length 1,220 km) the volume of one pipeline can be calculated as 1.27 million m3. At the settle out pressure of 165 bar, there will be the equivalent of 210 million m3 (at atmospheric pressure) or around 148,000 tons of gas in one enclosed pipeline. According to the EIA, the consequent environmental impacts can occur following the release of gas:


  • Emission of greenhouse gases to the atmosphere:
    Methane, equivalent to the release of 3.7 million tons of CO2 in terms of climate change potential
  • Impacts on water quality:
    Natural gas exhibits negligible solubility in water, and thus has little effect on water quality in the event of an underwater leak. The gas will rise to the water surface, from where it will be released into the atmosphere; the extent to which it dissipates depends on meteorological conditions and the weight of the gas in relation to the surrounding air. A short thermal impact (temperature drop to negative value caused by gas expansion, or Joule Thomson effect) may occur in the surrounding water. Another possible impact on water quality from an accidental pipeline rupture and gas release is a possible updraft of bottom water. This could cause bottom water to be mixed with surface water, with an impact on salinity, temperature and oxygen conditions.
  • Impacts on fish, marine mammals and birds:
    All marine organisms (benthic fauna, fish, marine mammals and birds) within the gas plume or the subsequent gas cloud will die or flee from the influenced area, which subsequently could impact the designation basis of protected areas (including Natura 2000 sites). The impact will be of limited time and space. 

Besides the expert assessment of higher than estimated in EIA climate impacts (up to 14.3 million tons of CO2-equivalent over a 100-year timeframe), the identified leaks are located in or near the only cod spawning area we have in the Eastern Baltic Sea. Hence the event can cause considerable harm/mortality to the young fish recently born in the area, as well as physical and physiological damage (incl. gas bubble disease), spatial disturbance, etc. To monitor the environmental consequences of this unprecedented situation, all EU Member States being HELCOM Contracting Parties in the area should swiftly deploy instruments to measure the status in relation to e.g. salinity, oxygen and pH. Such equipment could be placed around the perimeter of the incident areas to measure if methane leak has further away effects.

Model prepared by Sabine Eckhardt, NILU.

We also herewith inquire that a transparent information process should be established by respective EU Member States being HELCOM Contracting Parties to keep the public aware of environmental impacts of the accident and their implications for future environmental efforts as well as their consequences on climate and health of the Baltic Sea. Respective HELCOM subsidiary bodies, i.e. STATE & CONSERVATION, RESPONSE and PRESSURE should be involved.


NOTES

- Full letter sent to HELCOM on 29 September 2022

- Media release: ICOS measurements show huge methane peaks in the atmosphere after Nord Stream leak (30 September 2022)

- Danish Energystyrelsen PR (28 September 2022)

- Reuters' article (26 September 2022)

- CCB Save Kurgalskiy campaign: https://www.ccb.se/save-kurgalskiy

- Espoo Report on Nord Stream 2 ( April 2017)

- Environmental Study: Pipeline System on the Swedish Continental Shelf Nord Stream AG – (October 2008)


By CCB June 15, 2026
The European Commission's evaluation confirms what environmental NGOs across Europe have long argued: the Common Fisheries Policy (CFP)'s challenge is not its design, but its implementation.
By CCB June 10, 2026
The poor status and decline of many Baltic Sea fish populations have been thoroughly documented over several decades, indicating that the entire ecosystem is in great distress. So far, policy interventions have not reversed, or even halted, the negative trend concerning many of these populations. The European Commission itself recently recognised in its Common Fishery Policy (CFP) evaluation report that progress on stock rebuilding is lacking and the number of stocks “ threatened by collapse due to impaired recruitment has increased during the reporting period ”. Fish populations that once formed the cornerstone of the Baltic Sea fishery, such as the eastern and western Baltic cod and the western Baltic herring, are now doing so poorly that the International Council for the Exploration of the Sea (ICES) is advising zero catch for these stocks. Yet, even with the targeted fishery being closed for some years now, none of these three stocks are showing sufficient signs of recovery. The condition (such as size and weight-at-age) of many flatfish populations, such as plaice, also raises alarm bells. The salmon spawning migration has fallen short of the target level in the past three years5. As a result, even the healthiest salmon stocks are now unlikely to produce enough smolts corresponding to sustainable levels in the coming years. To address the crisis facing Baltic populations and the broader ecosystem, political will and ambition to improve fisheries management, alongside full implementation of the CFP provisions, are needed. The recent INI report on the Baltic Sea Multi-Annual Plan shows that the European Parliament recognises the importance of ecosystem-based fisheries management as well as the need for consideration of environmental legislation when making decisions on fishing opportunities.6 Fisheries managers must now act swiftly and decisively on the commitment the Commission and Baltic Sea Member States made at last year’s October Agrifish Council to rebuild Baltic Sea stocks. This document presents the joint NGO recommendations regarding Baltic Sea fishing opportunities for 2027, prioritising long-term ecosystem health and sustainable fisheries management over short-term economic interests. The recommendations are based on the ICES advice, the objectives and requirements of the CFP8 and the Baltic Multiannual Plan (MAP), specifically to apply the precautionary approach and implement an ecosystem-based approach to fisheries management, and the objective of achieving Good Environmental Status (GES) under the Marine Strategy Framework Directive (MSFD). Last year’s overarching joint Briefing Series on TAC-setting, co-signed by almost 30 organisations across the EU and the UK, including environmental NGOs, recreational fishers, and fishing rights owners, remains valid and provides further context, background and detailed explanations on the cross-cutting issues raised in this document. Read the Joint NGO recommendations on Baltic Sea fishing opportunities for 2027 here .