Overview

California deploys electronic monitoring across pretrial release, probation, post-release community supervision (PRCS), and parole. The 2011 Public Safety Realignment Act (AB 109) shifted responsibility for supervising certain offenders from the state to counties, dramatically expanding county probation department EM caseloads. Proposition 57 further expanded early release pathways, increasing the population eligible for community-based supervision with electronic monitoring.

County probation departments are the primary implementers of electronic monitoring in California. The California Department of Corrections and Rehabilitation (CDCR) retains oversight of state parole, but the majority of post-prison supervision now occurs at the county level under PRCS. Agencies must understand this split jurisdiction when procuring equipment and designing programs.

California’s 58 counties vary dramatically in size and resources. Los Angeles County operates one of the nation’s largest probation departments with PRCS caseloads in the tens of thousands. Smaller rural counties may supervise dozens rather than thousands. Procurement approaches, vendor relationships, and technology sophistication differ accordingly. Statewide vendor contracts are uncommon—most procurement occurs at the county level, though some regional collaboratives exist.

Key Statutes and Laws

California Penal Code provisions authorize electronic monitoring in several contexts. Home detention programs may use electronic monitoring when jail space is insufficient—participants remain in their residence during designated hours and may be monitored using GPS devices or other supervising devices. State law restricts electronic monitoring devices from being used for eavesdropping or recording conversations, except for voice identification purposes with supervisors.

AB 109 (the Public Safety Realignment Act of 2011) applies to nonviolent, non-serious, and non-sex offenders released from state prison. Instead of state parole, these offenders report to county probation officers under Post-Release Community Supervision. The law mandates that counties implement evidence-based practices to reduce recidivism. Community-based punishment options explicitly include home detention with electronic monitoring or GPS monitoring.

Proposition 57 addressed parole eligibility and sentence credits. It allows parole consideration for persons convicted of nonviolent felonies upon completion of their primary offense prison term. CDCR may award sentence credits for rehabilitation, good behavior, or educational achievements. This has increased the number of offenders released to community supervision—and thus the demand for electronic monitoring capacity.

Program Types

Post-Release Community Supervision (PRCS)

County probation departments supervise AB 109 offenders under PRCS. Electronic monitoring is a standard supervision tool. Caseloads include offenders who would previously have been on state parole. Counties have discretion in program design but must comply with realignment requirements and evidence-based practice standards.

Probation

Standard probation may include electronic monitoring as a condition. County probation departments supervise these caseloads. GPS monitoring is common for higher-risk offenders; RF home monitoring may suffice for curfew enforcement. Probation officers select monitoring levels based on risk assessment and court orders.

Home Detention

California authorizes involuntary home detention programs with electronic monitoring when jail space is insufficient. Participants remain in their residence during designated hours. GPS or RF monitoring confirms compliance. These programs provide a jail alternative for sentenced offenders. Home detention is distinct from PRCS probation—participants are serving a sentence rather than under post-release supervision. Counties use home detention to manage jail overcrowding while maintaining a supervision footprint. Equipment selection for home detention may favor RF base units for curfew-only enforcement, though GPS is increasingly used when exclusion zones or location verification beyond the residence is required.

Pretrial Release

Counties may offer pretrial electronic monitoring as a condition of release. Program administration varies by county—some operate through probation departments, others through pretrial services or sheriff’s offices. Bail reform efforts have increased interest in pretrial EM as a release condition. California’s pretrial landscape continues to evolve; some counties are expanding EM as an alternative to custody for defendants who would otherwise remain in jail pending trial. Coordination between courts, probation, and jail booking is essential for pretrial EM—device installation often occurs at or shortly after release.

Equipment Requirements

California does not mandate a single equipment specification. County probation departments typically require:

• GPS capability: For PRCS and higher-risk probation caseloads, continuous location tracking is standard
• No eavesdropping: State law prohibits electronic monitoring devices from recording or eavesdropping on conversations—equipment must not include audio capture beyond voice identification
• Tamper detection: Reliable anti-tamper to support violation reporting and potential revocation proceedings
• Cellular connectivity: Coverage across California’s diverse geography, including urban, suburban, and rural areas
• Scalability: AB 109 and Prop 57 have increased caseloads significantly; platforms must scale with department growth

Counties issue RFPs with jurisdiction-specific requirements. Vendors should expect variation in technical specs and reporting expectations.

Evidence-based practice requirements under AB 109 influence program design. Counties must demonstrate that supervision interventions—including electronic monitoring—are grounded in risk-need-responsivity principles. This means equipment and platforms should support risk assessment integration, graduated responses to violations, and outcome measurement. Vendors that can provide compliance and outcome dashboards aligned with evidence-based frameworks have an advantage in California procurements.

Vendor Selection Considerations

California county procurement cycles can be lengthy. Large counties (LA, San Diego, Orange) often run multi-year contracts with option periods. Vendors should plan for extended evaluation timelines and multiple stakeholder interviews. Probation chiefs, IT staff, line officers, and sometimes court administrators all have input. Demonstrating integration with existing case management systems—used by many California counties—can be a differentiator. Cost per day is scrutinized closely given AB 109 funding pressures.

California agencies evaluating EM vendors should consider:

• County procurement processes: Large counties (Los Angeles, San Diego, Orange, etc.) have substantial EM programs and rigorous RFP processes; smaller counties may have different needs
• AB 109 / PRCS experience: Vendors familiar with county probation workflows and PRCS reporting requirements have an advantage
• Compliance with Penal Code restrictions: Ensure equipment does not include prohibited audio recording capabilities
• Platform scalability: Realignment has driven caseload growth; vendors must demonstrate capacity for large deployments
• CDCR integration (if applicable): Some counties coordinate with CDCR for parole/PRCS handoffs; data portability may matter

Compliance Checklist

Before deploying or expanding electronic monitoring in California:

• ✓ Confirm statutory authority for the program type (PRCS, probation, home detention, pretrial)
• ✓ Verify equipment complies with Penal Code restrictions on audio recording and eavesdropping
• ✓ Align with county probation department policies and risk assessment protocols
• ✓ Establish violation response protocols consistent with evidence-based practices
• ✓ Document court orders and supervision conditions
• ✓ Train probation staff on device installation, alert response, and revocation procedures
• ✓ Ensure reporting meets CDCR or county data requirements where applicable

Frequently Asked Questions

How did AB 109 change electronic monitoring in California?

AB 109 (Public Safety Realignment) shifted supervision of nonviolent, non-serious, non-sex offenders from state parole to county probation. County probation departments now supervise these offenders under Post-Release Community Supervision (PRCS). Electronic monitoring—including GPS and home detention—is an authorized and widely used PRCS tool. This dramatically increased county EM caseloads.

Does Proposition 57 affect electronic monitoring demand?

Yes. Proposition 57 expanded parole eligibility and sentence credits for nonviolent offenders. More offenders are released earlier to community supervision, increasing the population eligible for electronic monitoring. County probation departments have seen sustained growth in PRCS and related EM caseloads.

Can California electronic monitors record conversations?

No. California Penal Code restricts electronic monitoring devices from being used for eavesdropping or recording conversations. Exception: voice identification purposes with supervisors. Agencies and vendors must ensure equipment does not include prohibited audio capture features.

For agencies evaluating GPS ankle monitoring equipment that meets California standards, contact CO-EYE for a demo.