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Noise Abatement Ordinance (NAO) (NAO)
SR 814.41 — Noise Abatement Ordinance of 15 December 1986 (NAO).
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:NOTE [links:https://fedlex.data.admin.ch/eli/cc/1987/338_338_338]
English is not an official language of the Swiss Confederation. This translation is provided for information purposes only and has no legal force.
English consolidation of 1 April 2026, which is also the date of the current binding text.

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Preamble
The Swiss Federal Council,
on the basis of Articles 5, 12 paragraph 2, 13 paragraph 1, 16 paragraph 2, 19, 21 paragraph 2, 23, 39 paragraph 1, 40 and 45 of the Federal Act of 7 October 1983 on the Protection of the Environment (the Act),
ordains:
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SR 814.01

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Contents
1. General Provisions — 2 articles
2. Vehicles, Mobile Appliances and Machines — 4 articles
3. New and Modified Stationary Installations — 6 articles
4. Existing Stationary Installations — 17 articles
5. Requirements for Building Zones and Planning Permission in Areas exposed to Noise — 4 articles
6. Soundproofing of New Buildings — 4 articles
7. Investigation, Assessment and Control of Exposure to Exterior Noise due to Stationary Installations — 10 articles
8. Final Provisions — 8 articles

:LINK
https://fedlex.data.admin.ch/filestore/fedlex.data.admin.ch/eli/cc/1987/338_338_338/20260401/en/html/fedlex-data-admin-ch-eli-cc-1987-338_338_338-20260401-en-html.html
Official text on Fedlex — consolidation of 1 April 2026