Morocco-Algeria Tensions: Environmental Dispute and Rising Regional Security Concerns

Relations between Morocco and Algeria are facing renewed pressure following a series of developments that have heightened concerns about stability in North Africa. An escalating dispute over water pollution, a general mobilization announcement by the Polisario Front, and the disappearance of the United Nations' ceasefire monitoring mechanism have combined to create an increasingly uncertain regional environment.

Although these developments concern separate issues, their close timing has raised questions about their potential implications for regional security and the already strained relationship between Rabat and Algiers.

The latest tensions come after the mandate of the United Nations Mission (MINURSO) expired on October 31, 2026, following the failure of the Security Council to agree on its renewal.

Water Pollution Dispute Takes on a Political Dimension

One of the main sources of friction concerns the Oued Mouilah, a river originating in Morocco before crossing into Algeria and supplying the Hammam Boughrara Dam in the Tlemcen region.

Algerian authorities have accused Morocco of allowing pollutants to flow into the watercourse, claiming that substances including nitrites, heavy metals and pharmaceutical residues have affected water quality, biodiversity and agricultural activities.

On November 10, Algerian President Abdelmadjid Tebboune ordered a ministerial delegation led by Interior Minister Brahim Merad to visit the affected area and assess the situation. Representatives from several government departments, including environment, water resources and health, took part in the visit.

The language subsequently used by Algerian officials gave the dispute a more confrontational character. Merad described the alleged pollution as a systematic act of aggression, while an official from the Environment Ministry referred to it as a cross-border crime.

Algerian authorities have also indicated that they possess laboratory analyses and satellite imagery supporting their allegations and have raised the possibility of taking the matter before international institutions.

However, determining whether pollution exists and establishing deliberate responsibility are two separate matters. Independent scientific investigations and transparent assessments would be necessary to identify the sources of contamination and establish any potential responsibility.

Polisario Announces General Mobilization

Another development adding to regional concerns came on November 10, when the Polisario Front announced a general mobilization following an extraordinary meeting chaired by its leader, Brahim Ghali.

The movement justified the decision by alleging increased Moroccan military activity near the defensive wall, including troop deployments and the movement of military equipment.

It called on its supporters to remain mobilized and urged the United Nations and the African Union to intervene in response to what it described as growing military risks.

The allegations concerning Moroccan military movements have not been independently verified. Furthermore, the announcement did not explicitly signal an imminent military offensive.

Nevertheless, the declaration represents another escalation in rhetoric from a movement that has claimed to have resumed armed hostilities since November 2020, following the breakdown of the 1991 ceasefire arrangement.

The End of MINURSO's Mandate Raises Security Questions

The timing of these developments is particularly sensitive because of the end of MINURSO's mandate.

Established in 1991, the UN mission played an important role in monitoring the ceasefire and maintaining an international presence in the area. Its military observers helped document incidents and follow developments on the ground.

On October 30, the UN Security Council failed to renew the mission's mandate. A US-backed draft resolution received 11 votes in favour but was blocked by Russia's veto, while an alternative Russian proposal failed to secure the nine votes required for adoption.

MINURSO subsequently ceased its operations when its mandate expired on October 31, triggering the withdrawal of personnel and equipment.

Although UN diplomatic efforts remain in place through the Secretary-General's Personal Envoy, Staffan de Mistura, the absence of the mission's operational monitoring structure creates a significant gap.

Without an equivalent mechanism on the ground, verifying military incidents and determining responsibility for potential violations could become more difficult. This raises concerns about the possibility of misunderstandings and further deterioration in an already fragile security environment.

Algeria's Domestic Challenges and the Political Use of External Tensions

Beyond the immediate security developments, the renewed confrontation also brings attention to the role of relations with Morocco in Algeria's domestic political discourse.

For several years, Moroccan-related issues have featured prominently in statements by Algerian officials, particularly in matters involving national security, espionage, migration and environmental concerns.

The recurrence of these accusations raises questions about how external tensions influence domestic political debates.

Algeria continues to face structural economic challenges despite its considerable energy resources. In its September 2026 assessment, the International Monetary Fund highlighted significant budgetary pressures, declining external reserves and the country's continued exposure to fluctuations in hydrocarbon revenues.

The IMF projected that Algeria's budget deficit could reach 9.6% of gross domestic product in 2026, underlining the importance of economic diversification and stronger public finances.

Employment, purchasing power, housing, healthcare and public freedoms also remain important concerns for the population.

Against this backdrop, portraying Morocco as a recurring external threat can reinforce security-focused narratives and shift public attention towards regional confrontation. However, the extent to which this dynamic influences political decision-making remains a matter of analysis rather than an established explanation for the latest developments.

A Regional Crisis Requiring Diplomatic Restraint

The simultaneous emergence of the environmental dispute, the Polisario's mobilization announcement and the end of MINURSO's mandate has reinforced concerns about the future of regional stability.

Algeria's political, diplomatic and military support for the Polisario Front remains a central factor in the wider regional equation. Meanwhile, Morocco faces the challenge of protecting its security interests while avoiding developments that could lead to a broader confrontation.

The changing diplomatic environment surrounding the dispute also adds another layer of complexity, as Morocco continues to promote its autonomy initiative and seek wider international support for its position.

Ultimately, the current situation highlights the importance of reliable information, independent investigations and diplomatic communication. Environmental allegations require scientific answers rather than political escalation, while military tensions demand mechanisms capable of preventing incidents from developing into larger confrontations.

For Morocco and Algeria, maintaining regional stability will require more than competing political narratives. It will depend on restraint, credible international engagement and a willingness to prevent bilateral disagreements from undermining the security of North Africa.