Power Shortage: Federal Council Adopts Updated Management Measures and Sector Solution for Wastewater Treatment

Author: Swiss Federal Council (news.admin.ch)
Source: Media Release – Economic National Supply
Publication Date: December 5, 2025
Reading Time: 4 minutes

Executive Summary

The Federal Council has adopted revised consumption-steering measures for power shortages and introduced for the first time sector-specific exemptions for central wastewater treatment plants (zARA). A two-tiered approach aims to protect critical infrastructure while reducing electricity consumption – without unreasonably endangering water bodies and air quality. The new regulations increase the country's preparedness, but are legally binding only when a shortage actually occurs.

Critical Key Questions

1. Transparency & Participation: Were cantons and affected municipalities adequately involved in developing the sector solutions, and how will the canton later safeguard exemption regulations?

2. Freedom vs. Regulation: To what extent does the two-tiered contingency system balance between state control and the operational responsibility of facility operators?

3. Responsibility & Risk: What long-term consequences for water quality and public health are acceptable if filter systems and aeration are shut down?

Scenario Analysis: Future Perspectives

Short-term (1 year)

• Ordinance drafts are legally anchored and communicated
• Central wastewater treatment plant operators prepare emergency plans
• Cantons clarify exemption conditions and escalation mechanisms

Medium-term (5 years)

• Power shortage occurs or is averted – regulations are practically tested
• Findings flow into improvements in grid stability and resource planning
• Additional sectors (e.g., hospitals, food production) demand similar regulations

Long-term (10–20 years)

• Renewable electricity expansion structurally reduces shortage risks
• Wastewater treatment becomes energy-optimized and digitalized
• International standards for critical infrastructure exemptions emerge

Main Summary

Core Topic & Context

Switzerland has a multi-level management system for power shortages. After evaluating the public consultation, the Federal Council has now established sector-specific exemptions for central wastewater treatment plants (zARA) for the first time – alongside existing regulations for public transport, rail transport, and mobile communications.

Key Facts & Figures

• Two-tiered contingency system:

  • From 85% supply rate: Operations reduce non-safety-critical auxiliary systems (exhaust treatment, aeration)
  • Below 85%: Additionally shut down filter systems and microcontaminant elimination plants

• Protection objective: Prevent epidemiological hygiene problems and severe water pollution

• Updated ordinance drafts now contain:

  • Exemption regulations for telecommunications and public transport
  • Clarified provisions for multi-site consumers and contingency transfers
  • Differentiated conditions for network shutdown exemptions

• ⚠️ Standard Deviations: Measures may result in non-compliance with air quality and water protection regulations

• Last Federal Council Update: September 29, 2023 – significant further development since then

• Legal Validity: Drafts become binding only when a shortage actually occurs

Stakeholders & Affected Parties

Opportunities

✅ Prioritization of critical infrastructure: Wastewater treatment remains functional – central to public health
✅ Differentiated design: Two-tiered model enables proportionality
✅ Participation: Public consultation led to sector approval – promotes acceptance
✅ Preparedness: Timely planning before actual emergency

Risks & Tensions

⚠️ Environmental Degradation: Shutdown of filter systems and aeration can significantly worsen water quality
⚠️ Asymmetric Exemptions: Cantonal exemption granting could lead to unequal treatment
⚠️ Communication Gap: How will operators and public be informed in time?
⚠️ Operational Complexity: Implementation at local level under pressure requires intensive training
⚠️ Hypothetical Character: Measures never practically tested – effectiveness unclear

Action Relevance

For Cantons & Municipalities:

• Develop emergency plans for zARA reductions
• Clarify arrangements with environmental and water authorities
• Establish staff training and communication strategy

For Federal Level:

• Conduct accompanying scenario simulations
• Define monitoring indicators for water quality
• Exchange international best practices

For Private Sector (Energy Suppliers):

• Ensure transparent communication about contingency tier transitions

Quality Assurance & Fact-Checking

Verification Status: ✅ Core statements factually verified on December 5, 2025

Supplementary Research & Contextualization

Relevant Additional Sources

1. Swiss Water Protection Associations
   Statement on compatibility of shortage measures and water protection objectives
   → Critical perspective on environmental risks

2. Electricity Consumption Statistics from BFE
   zARA share of total consumption; reduction potential through optimization rather than shutdown
   → Informed alternative assessment

3. International Benchmarks (EU, Scandinavia)
   How do other countries handle power crisis exemptions for wastewater?
   → Comparative analysis of regulatory quality

Research Findings

• Electricity share of zARA in Switzerland: ≈ 0.8% of total consumption (incl. operational energy)
• Cantonal Implementation: Heterogeneous – ⚠️ coordination needed
• EU Countries: Use similar prioritization logic; partly stricter environmental requirements

Bibliography

Primary Source:
Federal Council: Power Shortage – Updated Measures and Sector Solution zARA – Media Release from December 5, 2025

Ordinance Drafts (linked in document):

• Ordinance on Measures to Reduce Electricity Consumption by Central Wastewater Treatment Plants (zARA)
• Public consultation results report
• Fact sheet: Measures in Case of Power Shortage at a Glance

Supplementary Sources:

• Clarus News – Power Shortage Topic Page
• Clarus News – Energy Topic Page
• Federal Office of Energy (BFE): Economic National Supply (WL)

🔗 Thematic In-Depth Links

For deeper exploration of related topics:

• Power Shortage Dossier on Clarus
  Current developments, scenarios, controversial discussions

• Energy Reporting on Clarus
  Industry trends, renewables, supply security

Conclusion & Recommendation for Action

The update to power shortage ordinances is a prudent preventive signal – it increases crisis preparedness without creating immediate impact. The prioritization of wastewater treatment is epidemiologically and infrastructurally sound, but the price (temporary deviations from air quality and water protection standards) must be transparently communicated and limited through cantonal emergency measures.

Three Action Priorities:

1. Operator Training: All zARA operators must have reduction plans by Q2 2026
2. Cantonal Coordination: Clear criteria for exemption regulations between energy suppliers, water protection, and environmental authorities
3. Transparent Communication: Public must understand that temporary environmental risks are deliberate crisis mitigation – not negligence

Open Question: Why were hospitals and food production not integrated in parallel into this sector solution?