Top Downtown Ontario Drug and Alcohol Addiction Centers
Downtown Ontario runs along Euclid Avenue, the model colony laid out by George Chaffey in 1882.
This directory lists 5 addiction treatment facilities within five miles of Downtown Ontario, covering detox, residential, outpatient and dual diagnosis care across Ontario and the wider county.
5 Drug and Alcohol Rehab Treatment Centers in Downtown Ontario, CA
Why Trust RehabSeekers?
RehabSeekers is an independent behavioral health directory covering drug and alcohol addiction and mental health treatment providers.
Learn More
Licensing & accreditation checks: Verified against state regulators and national accreditation bodies.
Human-verified listings: Each facility manually reviewed for licensing and compliance.
100% independent: We are independent and never accept any commissions.
Direct connections only: Listings show direct contacts to avoid third-party centers.
See our accreditation standards and listing guidelines.
Drug and Alcohol Rehabs in Downtown Ontario, Ontario
Downtown Ontario runs along Euclid Avenue, the model colony laid out by George Chaffey in 1882.
Chaffey, a Canadian engineer, designed a mutual water company that gave every landowner a share in the irrigation system, and the model was copied across the American west and later in Australia.
Euclid Avenue runs arrow-straight for seven miles from the mountains to the valley floor with a double row of trees down the median. The Graber Olive House has packed olives on the same site since 1894.
Interstates 10 and 15 both serve the city, putting downtown Los Angeles around 40 minutes west.
California recorded a drug overdose death rate roughly 6 percent below the national figure in 2024, and Southern California drove much of the improvement.
Los Angeles County recorded a 22 percent fall in overdose deaths that year, from 3,137 to 2,438, the largest single-year drop in its history, and fentanyl deaths fell below methamphetamine deaths for the first time in years.
Methamphetamine was involved in 62 percent of accidental overdose deaths in Los Angeles County in 2024, up from 60 percent, while fentanyl involvement fell to 52 percent from 64 percent.
San Bernardino County participates in the Drug Medi-Cal Organized Delivery System, live since March 2018, which covers a full continuum of care assessed against American Society of Addiction Medicine criteria.
Which Level of Care Do You Need
The counts below reflect facilities in or near Downtown Ontario — 5 within five miles.
Medically Supervised Detox
Detox manages withdrawal under clinical observation, usually across several days, and is where treatment begins for anyone physically dependent on alcohol, opioids or benzodiazepines. None of the facilities within five miles offer detox. The county access line can arrange it elsewhere in San Bernardino County.
Inpatient Residential Treatment
Residential care provides a structured live-in setting for weeks or months. Around 1 of the 5 facilities in or near Downtown Ontario offers residential care.
Outpatient, IOP and PHP Treatment
Outpatient care lets you live at home while attending sessions. Around 4 facilities offer outpatient services and 2 offer IOP. Four offer telehealth and 3 offer medication-assisted treatment. None offer PHP.
Dual Diagnosis and Co-Occurring Disorders Treatment
Dual diagnosis care treats a substance use disorder and a mental health condition together rather than in sequence. Around 3 of the 5 facilities in or near Downtown Ontario indicate they treat co-occurring disorders.
Sober Living Homes and Transitional Living
Sober living homes provide drug-free housing after formal treatment ends. This directory does not list recovery residences separately. California certifies recovery residences through the California Consortium of Addiction Programs and Professionals and regional affiliates of the National Alliance for Recovery Residences.
Addiction Treatment Cost and Insurance Coverage
Four of five facilities accept Medi-Cal, and Ontario is where much of the western valley’s publicly funded provision sits.
How Much Does Addiction Rehab Cost in Downtown Ontario
Residential rehab in Ontario runs roughly $6,000 to $45,000 a month, IOP $3,000 to $10,000 and outpatient $1,200 to $5,000, all available locally. Detox at $7,000 to $24,000 and PHP at $7,500 to $15,000 both mean traveling. Of the 5 facilities, 4 accept Medi-Cal and 3 accept Medicare.
Three of five facilities offering medication-assisted treatment is reasonable provision, and for opioid dependence that is usually the level that matters most.
| Level of care | Monthly | Daily |
|---|---|---|
| Medical detox (inpatient) | $7,000 – $24,000 | $230 – $800 |
| Residential inpatient | $6,000 – $45,000 | $200 – $1,500 |
| PHP | $7,500 – $15,000 | $250 – $500 |
| IOP | $3,000 – $10,000 | $100 – $330 |
| Outpatient | $1,200 – $5,000 | $40 – $170 |
| Level of care | Monthly | Daily |
|---|---|---|
| Residential inpatient | $30,000 – $90,000+ | $1,000 – $3,000+ |
| PHP | $15,000 – $35,000 | $500 – $1,150 |
| IOP | $9,000 – $24,000 | $300 – $800 |
| Outpatient | $5,000 – $15,000 | $170 – $500 |
Does Insurance Cover Rehab in Downtown Ontario
Yes. Federal parity law requires most health plans to cover substance use treatment on terms comparable to medical care. Among the 5 facilities in or near Downtown Ontario, 5 accept Medi-Cal, 2 accept Medicare and 4 accept TRICARE. Inland Empire Health Plan and Molina Healthcare are the Medi-Cal managed care plans across San Bernardino County.
Ask about Spanish-language provision when you call. The western Inland Empire has a large Spanish-speaking population and treatment works considerably better in a first language. California extended full-scope Medi-Cal to income-eligible adults regardless of immigration status in 2024.
Free and State-Funded Addiction Rehab in Downtown Ontario, Ontario
Publicly funded care is the main route for most people here.
Four of the 5 facilities accept Medi-Cal, and an eligibility check costs nothing.
San Bernardino County Department of Behavioral Health runs the DMC-ODS access line, which assesses and refers countywide at no charge, on 800-968-2636.
The California Naloxone Distribution Project supplies naloxone free to community organizations, and Never Use Alone on 800-484-3731 stays on the line with people using alone.
More Help and Recovery Support
San Antonio Regional Hospital in Upland and Kaiser Permanente Ontario both serve the western valley. Arrowhead Regional Medical Center in Colton is the county hospital and a level two trauma center, and Loma Linda University Medical Center is the region’s level one trauma center, both around half an hour east.
Alcoholics Anonymous meets daily across Ontario and the western Inland Empire, including a substantial Spanish-language schedule. Narcotics Anonymous operates a large Southern California region. Adjacent Ontario Center, Creekside and Upland carry further options.
Free lines, available now
988 Suicide & Crisis Lifeline — call or text 988, free and confidential, 24 hours a day
CalHOPE Warm Line — 833-317-4673
Never Use Alone — 800-484-3731
SAMHSA National Helpline — 1-800-662-4357
Rehab Seekers is a directory. The information on this page is for general reference and is not medical advice. Decisions about treatment should be made with a licensed clinician who knows your history. If you or someone you care about is in immediate danger, call 911.
References and Citations
Los Angeles County Department of Public Health — Drug Overdoses in Los Angeles County, 2025 data reports.
California Department of Public Health — Overdose Surveillance Dashboard and opioid overdose death briefs.
California Department of Health Care Services — Drug Medi-Cal Organized Delivery System county participation, January 2025.
Rehab Seekers directory listings, Downtown Ontario, August 2026.
Rehab Seekers market rate research, California standard and luxury programs, 2026. Ranges are indicative and vary by facility, length of stay and coverage.