Weights & Measures - Scales and Pumps in Ontario, CA

Business and Consumer Protection California 3 Minutes Read · published February 20, 2026 Flag of California

Businesses that sell goods by weight or volume in Ontario, California must keep commercial scales and fuel pumps accurate and certified. This guide explains who inspects devices, what to expect from routine and complaint inspections, typical violations, and the practical steps businesses should take to remain compliant with weights and measures rules that apply in Ontario, CA. It summarizes enforcement pathways, appeals and common paperwork so owners of grocery scales, deli balances, and motor fuel dispensers can prepare for inspections and reduce risk of enforcement action.

Keep calibration records with the device and make them available during inspections.

Overview of Weights & Measures for Scales and Pumps

Commercial weighing and measuring devices used for trade include retail scales, price-computing scales, vehicle scales, and motor fuel dispensers (pumps). Device accuracy is enforced at the county level in California under state measurement standards and local enforcement programs. Inspections may be routine, upon installation, after repairs, or in response to consumer complaints. Owners and operators must maintain devices, post any required certificates, and allow access for testing.

Penalties & Enforcement

Enforcement authority for device testing and consumer-protection enforcement in Ontario, California is the county Agricultural Commissioner/Weights and Measures office. Specific civil fines or penalty schedules for noncompliant scales and pumps are not specified on the cited county page; businesses should contact the county office for up-to-date penalty information and enforcement procedures. San Bernardino County Agricultural Commissioner/Weights & Measures[1]

If a device fails an inspection, remove it from service until repaired and retested.
  • Enforcer: San Bernardino County Agricultural Commissioner/Weights & Measures is the local enforcer; they inspect, seal, and may issue notices.
  • Fine amounts: not specified on the cited page; contact the county for current fines and civil penalty schedules.
  • Escalation: first, repeat, and continuing offence procedures and ranges are not specified on the cited page.
  • Non-monetary sanctions: orders to correct, device seizure, condemnation, or court action may be used; exact remedies are not specified on the cited page.
  • Inspection and complaint pathway: file a complaint or request an inspection with the county weights and measures office via their official contact page.
  • Appeal and review: specific administrative appeal procedures and time limits are not specified on the cited page; inquire with the county about appeal deadlines and process.

Applications & Forms

The county typically provides device test reports, calibration and repair tags, and registration or permit information for commercial devices. Specific form names or numbers are not published on the cited county page; contact the county weights and measures office to obtain the correct forms and submission instructions.

Compliance & Typical Violations

  • Failure to have required seals or current inspection stickers after testing.
  • Out-of-tolerance readings or inaccurate price-computing scales.
  • Motor fuel dispensers that underdeliver fuel.
  • Missing or incomplete calibration and repair records.
Keep service and calibration receipts for at least the period recommended by your county inspector.

Action Steps for Businesses

  • Register devices and request initial inspection before placing a device into commercial use if required by the county.
  • Schedule routine maintenance and calibration with a qualified technician and keep records on site.
  • Respond promptly to inspection notices and correct deficiencies within the time allowed.
  • If you disagree with a finding, ask the county about administrative review or appeal steps and deadlines.

FAQ

Do I need to have commercial scales or pumps inspected in Ontario, CA?
Yes. Commercial weighing and measuring devices used for trade are subject to inspection by the county weights and measures office; contact the local office for scheduling and requirements.
How often are inspections required?
Inspection frequency varies by device type and local program; routine, installation, repair, and complaint inspections are common—check with the county for specific intervals.
What happens if my device fails an inspection?
If a device fails, the county inspector may require repair, retesting, removal from service, or issue notices; exact penalties or timelines are set by the enforcing office.

How-To

  1. Identify every commercial device used for sale by weight or volume.
  2. Contact San Bernardino County Weights & Measures to confirm registration, inspection scheduling, and any required fees.
  3. Have devices calibrated and repaired as needed by licensed service technicians and retain calibration certificates.
  4. Be available for inspection, present records, and promptly correct any defects identified by inspectors.
  5. If you receive enforcement action, follow the notice instructions and ask the county about appeal options and deadlines.

Key Takeaways

  • County weights and measures enforce device accuracy for consumer protection.
  • Maintain calibration records and remove failing devices from service until repaired.

Help and Support / Resources

  1. [1] San Bernardino County Agricultural Commissioner/Weights & Measures

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