Title 6 — SANITATION AND HEALTH
Chapter 19 — ONSITE WASTEWATER TREATMENT SYSTEMS
Yolo County Municipal Code · 2026-09 edition · updated 2026-10-02 · Yolo County
Sec. 6-19.101. Legal authority.¶
Sec. 6-19.201. Purposes.¶
Sec. 6-19.301. Applicability.¶
Sec. 6-19.401. Alternative system.¶
Sec. 6-19.402. Appeal.¶
Sec. 6-19.403. Appeal Board.¶
Sec. 6-19.404. Applicant.¶
Sec. 6-19.405. As-built drawing.¶
Sec. 6-19.406. Authorized representative.¶
Sec. 6-19.407. Bedroom or potential sleeping room.¶
Sec. 6-19.408. Beneficial use.¶
Sec. 6-19.409. Building permit.¶
Sec. 6-19.410. Cesspool.¶
Sec. 6-19.411. Cluster system.¶
Sec. 6-19.412. Community system.¶
Sec. 6-19.413. Contamination.¶
Sec. 6-19.414. Contractor.¶
Sec. 6-19.415. Cumulative impacts.¶
Sec. 6-19.416. DEH.¶
Sec. 6-19.417. Director of Environmental Health.¶
Sec. 6-19.418. Dispersal field.¶
Sec. 6-19.419. Dispersal system.¶
Sec. 6-19.420. Division of Environmental Health (DEH).¶
Sec. 6-19.421. Domestic wastewater.¶
Sec. 6-19.422. Effective soil.¶
Sec. 6-19.423. Effluent.¶
Sec. 6-19.424. Expansion.¶
Sec. 6-19.425. Failing system.¶
Sec. 6-19.426. Final approval.¶
Sec. 6-19.427. Geotechnical report.¶
Sec. 6-19.428. Graywater.¶
Sec. 6-19.429. Graywater system.¶
Sec. 6-19.430. Groundwater.¶
Sec. 6-19.431. High strength wastewater.¶
Sec. 6-19.432. Holding tank.¶
Sec. 6-19.433. Industrial wastewater.¶
Sec. 6-19.434. Installation permit.¶
Sec. 6-19.435. Land use project.¶
Sec. 6-19.436. Large system.¶
Sec. 6-19.437. Lot.¶
Sec. 6-19.438. Manual.¶
Sec. 6-19.439. Minimum useable wastewater dispersal area (MUWDA).¶
Sec. 6-19.440. Non-discharging wastewater disposal unit.¶
Sec. 6-19.441. Onsite wastewater treatment system (system).¶
Sec. 6-19.442. Onsite Wastewater Treatment System Manual (Manual).¶
Sec. 6-19.443. Onsite Wastewater Treatment System Policy (OWTS Policy).¶
Sec. 6-19.444. Operating permit.¶
Sec. 6-19.445. Operation, Maintenance and Monitoring (OM&M) Program.¶
Sec. 6-19.446. Owner.¶
Sec. 6-19.447. Percolation test.¶
Sec. 6-19.448. Person.¶
Sec. 6-19.449. Portable toilet.¶
Sec. 6-19.450. Public nuisance.¶
Sec. 6-19.451. Public sewer system.¶
Sec. 6-19.452. Public water system.¶
Sec. 6-19.453. Qualified system designer.¶
Sec. 6-19.454. Qualified professional.¶
Sec. 6-19.455. Regional Water Quality Control Board.¶
Sec. 6-19.456. Replacement area.¶
Sec. 6-19.457. Seepage pit.¶
Sec. 6-19.458. Septage.¶
Sec. 6-19.459. Septage pumper.¶
Sec. 6-19.460. Septic tank.¶
Sec. 6-19.461. Service provider.¶
Sec. 6-19.462. Site evaluation.¶
Sec. 6-19.463. Site evaluation report.¶
Sec. 6-19.464. Site map review.¶
Sec. 6-19.465. Slope.¶
Sec. 6-19.466. Soil.¶
Sec. 6-19.467. Soil texture.¶
Sec. 6-19.468. Standard system.¶
Sec. 6-19.469. Subdivision.¶
Sec. 6-19.470. Substandard tank.¶
Sec. 6-19.471. Supplemental treatment.¶
Sec. 6-19.472. Supplemental treatment unit.¶
Sec. 6-19.473. System.¶
Sec. 6-19.474. System design.¶
Sec. 6-19.475. Unstable land mass.¶
Sec. 6-19.476. Vault privy.¶
Sec. 6-19.477. Vertical separation.¶
Sec. 6-19.478. Wastewater.¶
Sec. 6-19.479. Watercourse.¶
Sec. 6-19.480. Waterless toilet.¶
Sec. 6-19.501. Manual.¶
Sec. 6-19.502. Wastewater application rates and septic tank size.¶
Sec. 6-19.601. General requirements.¶
Sec. 6-19.602. System subjected to California Central Valley Regional Water Quality…¶
Sec. 6-19.603. Requirements for system contractor.¶
Sec. 6-19.604. Permits.¶
Sec. 6-19.605. Requirements for site evaluation.¶
Sec. 6-19.606. Requirements for siting, design, operation and maintenance.¶
Sec. 6-19.607. Approved sewage disposal required.¶
Sec. 6-19.608. General requirements for building permit application using existing system.¶
Sec. 6-19.609. General requirements for business license application using existing…¶
Sec. 6-19.610. Prohibitions.¶
Sec. 6-19.611. Minimum horizontal setbacks.¶
Sec. 6-19.612. Minimum vertical setbacks.¶
Sec. 6-19.613. Construction inspections.¶
Sec. 6-19.614. Unauthorized work.¶
Sec. 6-19.615. Abatement.¶
Sec. 6-19.616. Required notification of system failure.¶
Sec. 6-19.617. Required notification of a system installation.¶
Sec. 6-19.618. Abandoned system.¶
Sec. 6-19.619. Refusal to finalize building permit for occupancy.¶
Sec. 6-19.620. Cesspools, seepage pits, and substandard tanks.¶
Sec. 6-19.621. Holding tanks; portable toilets; vault privy.¶
Sec. 6-19.622. Cumulative impacts.¶
Sec. 6-19.623. Property improvements and system expansion.¶
Sec. 6-19.624. Replacement of the dispersal field.¶
Sec. 6-19.701. Use of alternative systems.¶
Sec. 6-19.702. Installation permit and review requirements for alternative systems.¶
Sec. 6-19.703. Operation, maintenance and monitoring (OM&M) requirements.¶
Sec. 6-19.801. Non-discharging wastewater disposal units may be allowed under limited…¶
Sec. 6-19.802. Owners of non-discharging wastewater disposal units approved after the…¶
Sec. 6-19.803. Owners of non-discharging wastewater disposal units shall maintain the…¶
Sec. 6-19.804. Setbacks for non-discharging wastewater disposal units shall be the same…¶
Sec. 6-19.901. Graywater systems.¶
Sec. 6-19.1001. Permitting, inspection and reporting requirements.¶
Sec. 6-19.1101. Land use project.¶
Sec. 6-19.1201. Connection to public sewer system required.¶
Sec. 6-19.1301. Areas with potential for groundwater pollution.¶
Sec. 6-19.1302. Areas with impacted groundwater.¶
Sec. 6-19.1401. Report requirements.¶
Sec. 6-19.1402. Records retention.¶
Sec. 6-19.1403. Water quality assessment program.¶
Sec. 6-19.1501. Enforcement.¶
Sec. 6-19.1502. Right of Entry.¶
Sec. 6-19.1503. Notice of violation.¶
Sec. 6-19.1504. Cease and desist orders.¶
Sec. 6-19.1505. Penalties.¶
Sec. 6-19.1601. Appeals procedure.¶
Sec. 6-19.1701. Severability.¶
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