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Earlier editions: 2026-09

Title 4 — HEALTH AND SAFETY›Division 420 — SEWAGE›Chapter 420-6 — SEWAGE COLLECTION AND DISPOSAL

Contra Costa County Municipal Code Art. 420-6.10 Sewage Collection Systems

Contra Costa County Municipal Code · 2026-10 edition · updated 2026-10-04 · Contra Costa County

Cite as: Contra Costa County Municipal Code Article 420-6.10 · Text as of 2026-10-04

420-6.1002 - Sewage holding tank systems.

(a) Site; design. The site and design of a sewage holding tank system under Subsection 420-6.404(b)(1) or Subsection 420-6.404(b)(2) must conform to applicable horizontal setbacks and other standards set forth in the sewage regulations.

(b) Permits. The installation of a sewage holding tank system may be lawfully performed only under a valid sewage holding tank permit issued by the health officer. The permit procedures set forth in Section 420-6.808 apply to sewage holding tank permits.

(c) Health officer approval. All work under a sewage holding tank permit must be approved by the health officer prior to use of the sewage holding tank system.

(d) Termination of use.

(1) Use of a sewage holding tank system connected to a structure under Subsection 420-6.404(b)(1)(D)(i) must terminate upon completion of construction of a new onsite wastewater treatment system that will serve the structure or within ninety calendar days after commencement of use of the sewage holding tank system, whichever occurs first.

(2) Use of a sewage holding tank system connected to a structure under Subsection 420-6.404(b)(1)(D)(ii) or Subsection 6.404(b)(2) must terminate within ninety calendar days after the health officer determines that connection to a sanitary sewer is available to the structure.

(Ord. No. 2018-25 § III, 9-11-18)

Exceptions & meaning →

420-6.1004 - Vault privies.

(a) A privy vault must be prefabricated and certified by the manufacturer as watertight.

(b) A vault privy may be constructed only on a site that conforms to the horizontal setbacks applicable to septic tanks.

(c) A vault privy may be lawfully constructed only under a valid construction permit issued by the health officer in accordance with the procedures set forth in Section 420-6.808.

(d) All work under a construction permit issued under this section must be inspected and approved by the health officer prior to use of the vault privy.

(Ord. No. 2018-25 § III, 9-11-18)

Exceptions & meaning →

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