Skip to main content

Environment and projects · France and Switzerland : separate country-labelled rules

Rainwater and greywater: prepare the reuse project

Rainwater or greywater reuse starts with the water source, intended use and installation design. Outdoor irrigation and indoor supply raise different health and discharge questions. French and Swiss requirements must be examined separately. The schematic records networks and safeguards without certifying drinking-water quality, assuming every use is authorised or treating a general water-protection rule as a complete installation standard.

  • Water source
  • Actual intended uses
  • Treatment and networks
  • Declaration or permission
Go to the toolSee the texts cited
  • Official texts cited
  • Sources checked on
  • Drafted with AI assistance, our method

By the AlphaDeep legal editorial team

General legal information with official references and dated checks. It is not personalised advice: for a decision that commits you, have your situation checked by a qualified professional.

Julie by AlphaDeep

Illustrative conversation
Example question

What uses are actually intended?

Julie Illustration

Match use, place and exposed people. French R1322-92 has categories; an environmental label is not general legal permission.

Read the references

Your question concerns “Rainwater and greywater: prepare the reuse project”. I can help organise the facts and records. Which document have you received or prepared, and is this a French or Swiss matter?

French law

3 free questions at signup. Avoid names and sensitive information.

Tool

Which records are still missing from your file?

Indicate which records you have. The result identifies gaps and prepares a complete question for Julie, without requiring an account.

julie://tool/memoireNothing leaves your browser

Answers stay on this page until you explicitly continue to Julie. Avoid names and sensitive information.

Fictional example · Your preparation

Point to complete: Declaration or permission. R1322-100 distinguishes declaration branches;101 has a sensitive-public framework. Source and installation facts must be established first.

Water source
Record available
Actual intended uses
Record available
Treatment and networks
Record available
Declaration or permission
Needs checking
Records indicated
3 / 4
  1. Which French formality corresponds to the installation?

This worksheet organises records; it does not establish admissibility, entitlement or a procedural outcome.

Answer

Which non-drinking water is to be reused?

France's R1322-90 distinguishes sources. Rainwater and greywater do not automatically share one permitted-use list.

Code de la santé publique art.R1322-90Code de la santé publique art.R1322-92Code de la santé publique art.R1322-100Code de la santé publique art.R1322-101Code de la santé publique art.R1322-108814.20 : Art. 6 Principe814.20 : Art. 7 Évacuation des eauxZürich : Regenwasserbewirtschaftung, Richtlinie und Praxishilfe, Ausgabe2025, page12Kantonales Labor Zürich : Trinkwasser, Hausinstallationen

Preparation schematic: connect records and questions. It does not guarantee a legal outcome. Rainwater and greywater: prepare the reuse project
Preparation schematic: connect records and questions. It does not guarantee a legal outcome.
Comparison

Which documents answer which questions?

Which documents answer which questions?
Record or informationIssue to check
Water sourceFrance's R1322-90 distinguishes sources. Rainwater and greywater do not automatically share one permitted-use list.
Actual intended usesMatch use, place and exposed people. French R1322-92 has categories; an environmental label is not general legal permission.
Treatment and networksKeep technical diagram and specifications. Zurich's2025 rainwater guidance expressly separates service-water and drinking-water pipe systems; it is a labelled cantonal example.
Declaration or permissionR1322-100 distinguishes declaration branches;101 has a sensitive-public framework. Source and installation facts must be established first.

Code de la santé publique art.R1322-90Code de la santé publique art.R1322-92Code de la santé publique art.R1322-100Code de la santé publique art.R1322-101Code de la santé publique art.R1322-108814.20 : Art. 6 Principe814.20 : Art. 7 Évacuation des eauxZürich : Regenwasserbewirtschaftung, Richtlinie und Praxishilfe, Ausgabe2025, page12Kantonales Labor Zürich : Trinkwasser, Hausinstallationen

Answer

What uses are actually intended?

Match use, place and exposed people. French R1322-92 has categories; an environmental label is not general legal permission.

Answer

Which treatment and pipe networks are proposed?

Keep technical diagram and specifications. Zurich's2025 rainwater guidance expressly separates service-water and drinking-water pipe systems; it is a labelled cantonal example.

Answer

Which French formality corresponds to the installation?

R1322-100 distinguishes declaration branches;101 has a sensitive-public framework. Source and installation facts must be established first.

The law

Which official provision helps explain this situation?

Tout système d'utilisation d'eaux impropres à la consommation humaine utilisant soit des eaux grises soit des eaux issues des piscines à usage collectif, ou utilisant des eaux brutes pour le lavage du linge, fait l'objet avant sa première mise en service d'une déclaration par le propriétaire des réseaux intérieurs de distribution d'eaux au préfet. Les informations figurant dans la déclaration sont précisées dans l'arrêté mentionné à l'article R. 1322-94.

Code de la santé publique art.R1322-100In force since 1 September 2024Read on Légifrance

In plain English: No. LEaux6/7 pollution and drainage rules do not establish an indoor-use permission matrix. Actual treatment, use and local requirements remain to verify.

Answer

Do Swiss discharge rules authorise indoor greywater use?

No. LEaux6/7 pollution and drainage rules do not establish an indoor-use permission matrix. Actual treatment, use and local requirements remain to verify.

Code de la santé publique art.R1322-90Code de la santé publique art.R1322-92Code de la santé publique art.R1322-100Code de la santé publique art.R1322-101Code de la santé publique art.R1322-108814.20 : Art. 6 Principe814.20 : Art. 7 Évacuation des eauxZürich : Regenwasserbewirtschaftung, Richtlinie und Praxishilfe, Ausgabe2025, page12Kantonales Labor Zürich : Trinkwasser, Hausinstallationen

Answer

What shutdown or backup provisions need checking?

France's R1322-108 addresses its own framework. The worksheet validates no connection or sanitary engineering design.

Code de la santé publique art.R1322-90Code de la santé publique art.R1322-92Code de la santé publique art.R1322-100Code de la santé publique art.R1322-101Code de la santé publique art.R1322-108814.20 : Art. 6 Principe814.20 : Art. 7 Évacuation des eauxZürich : Regenwasserbewirtschaftung, Richtlinie und Praxishilfe, Ausgabe2025, page12Kantonales Labor Zürich : Trinkwasser, Hausinstallationen

Answer

No. Product, installation, use and local requirements remain distinct. A purchase contract resolves none automatically.

Answer

What does the reuse map prepare?

It organises source, use, technical scheme and applications. It guarantees no drinking-water safety and grants no permission.

Frequent questions

What other questions arise in this file?

What uses are actually intended?

Match use, place and exposed people. French R1322-92 has categories; an environmental label is not general legal permission.

Code de la santé publique art.R1322-90Code de la santé publique art.R1322-92Code de la santé publique art.R1322-100Code de la santé publique art.R1322-101Code de la santé publique art.R1322-108814.20 : Art. 6 Principe814.20 : Art. 7 Évacuation des eauxZürich : Regenwasserbewirtschaftung, Richtlinie und Praxishilfe, Ausgabe2025, page12Kantonales Labor Zürich : Trinkwasser, Hausinstallationen

Which French formality corresponds to the installation?

R1322-100 distinguishes declaration branches;101 has a sensitive-public framework. Source and installation facts must be established first.

Code de la santé publique art.R1322-90Code de la santé publique art.R1322-92Code de la santé publique art.R1322-100Code de la santé publique art.R1322-101Code de la santé publique art.R1322-108814.20 : Art. 6 Principe814.20 : Art. 7 Évacuation des eauxZürich : Regenwasserbewirtschaftung, Richtlinie und Praxishilfe, Ausgabe2025, page12Kantonales Labor Zürich : Trinkwasser, Hausinstallationen

Do Swiss discharge rules authorise indoor greywater use?

No. LEaux6/7 pollution and drainage rules do not establish an indoor-use permission matrix. Actual treatment, use and local requirements remain to verify.

Code de la santé publique art.R1322-90Code de la santé publique art.R1322-92Code de la santé publique art.R1322-100Code de la santé publique art.R1322-101Code de la santé publique art.R1322-108814.20 : Art. 6 Principe814.20 : Art. 7 Évacuation des eauxZürich : Regenwasserbewirtschaftung, Richtlinie und Praxishilfe, Ausgabe2025, page12Kantonales Labor Zürich : Trinkwasser, Hausinstallationen

Does buying a tank establish legal compliance?

No. Product, installation, use and local requirements remain distinct. A purchase contract resolves none automatically.

Code de la santé publique art.R1322-90Code de la santé publique art.R1322-92Code de la santé publique art.R1322-100Code de la santé publique art.R1322-101Code de la santé publique art.R1322-108814.20 : Art. 6 Principe814.20 : Art. 7 Évacuation des eauxZürich : Regenwasserbewirtschaftung, Richtlinie und Praxishilfe, Ausgabe2025, page12Kantonales Labor Zürich : Trinkwasser, Hausinstallationen

Sources

Which official references should you consult?

  1. Code de la santé publique art.R1322-90Légifrance
  2. Code de la santé publique art.R1322-92Légifrance
  3. Code de la santé publique art.R1322-100Légifrance
  4. Code de la santé publique art.R1322-101Légifrance
  5. Code de la santé publique art.R1322-108Légifrance
  6. 814.20 : Art. 6 PrincipeFedlex
  7. 814.20 : Art. 7 Évacuation des eauxFedlex
  8. Zürich : Regenwasserbewirtschaftung, Richtlinie und Praxishilfe, Ausgabe2025, page12Source officielle
  9. Kantonales Labor Zürich : Trinkwasser, HausinstallationenSource officielle

Texts cited last checked: 1 November 2026

Next steps

Which neighbouring situations should remain separate?