Food truck safety statistics show that risk is concentrated in a few practical areas: contamination, temperature control, worker illness, and cooking-equipment hazards. The available evidence combines a large retail-food outbreak study with narrower mobile-vendor investigations, local inspection records, and fire-safety guidance.
Table of contents
- What the broad outbreak data measure
- The main contamination and temperature factors
- What establishment profiles and inspections show
- Ill-worker reporting and exclusion controls
- Evidence from mobile-vendor studies
- Food truck fire, propane, and inspection measurements
What the broad outbreak data measure
The Centers for Disease Control and Prevention recorded 800 foodborne illness outbreaks associated with 875 retail food establishments during 2017–2019. These figures come from the National Environmental Assessment Reporting System, covering 25 state and local health departments. The report is an outbreak-linked retail dataset, not a national census of food trucks. Mobile food units are included within its broader “other” establishment category.
The annual totals varied across the period:
| Year | Outbreaks | Share of 2017–2019 total |
|---|---|---|
| 2017 | 216 | 27.0% |
| 2018 | 306 | 38.3% |
| 2019 | 278 | 34.8% |
Source: CDC, Foodborne Illness Outbreaks at Retail Food Establishments, 2017–2019.
Most reported outbreaks involved one establishment. Single-establishment outbreaks accounted for 725 of 800 outbreaks, or 90.6%, while multiple-establishment outbreaks accounted for 75, or 9.4%. Multistate outbreaks made up 28 cases, or 3.5%.
Investigators identified an etiologic agent in 555 of the 800 outbreaks, or 69.4%. Of those outbreaks with an identified agent, 398, or 71.7%, were confirmed, while 157, or 28.3%, were suspected rather than laboratory-confirmed. These distinctions matter: an outbreak record can identify a likely cause without every case meeting laboratory-confirmation criteria.
The CDC findings also show why outbreak counts should not be read as a complete measure of everyday safety. They describe reported, investigated outbreaks associated with participating jurisdictions and establishments. They do not estimate the probability that any individual food truck will cause illness.
The main contamination and temperature factors
At least one contributing factor was identified in 500 of the 800 outbreaks during 2017–2019, or 62.5%. The CDC grouped contributing factors into contamination, proliferation, and survival categories. Contamination factors appeared in 426 of those 500 outbreaks, or 85.2%. Proliferation factors appeared in 129, or 25.8%, and survival factors appeared in 71, or 14.2%. These categories can overlap, so their percentages should not be added together.
The most frequently reported individual factors were linked to handling and worker practices:
- Contamination by a worker suspected of infectious illness appeared in 104 outbreaks, or 20.8% of the 500 outbreaks with an identified factor.
- Contaminated raw food was a factor in 88 outbreaks, or 17.6%.
- Bare-hand contact with ready-to-eat food by an ill worker was reported in 72 outbreaks, or 14.4%.
- Cross-contamination of ingredients appeared in 68 outbreaks, or 13.6%.
- Improper or slow cooling of hot food appeared in 53 outbreaks, or 10.6%.
- Insufficient time or temperature during cooking or heat processing appeared in 33 outbreaks, or 6.6%.
Source: CDC, Foodborne Illness Outbreaks at Retail Food Establishments, 2017–2019.
For a mobile kitchen, the practical implication is that food safety depends on several linked controls rather than one single checkpoint. Raw-food separation addresses cross-contamination. Hand and glove procedures address ready-to-eat food. Cooling procedures address the period after cooking. Cooking and reheating controls address survival factors. The statistics describe outbreak investigations; they do not show that every food truck has each risk.
A local inspection record illustrates how large a temperature gap can be when a control fails. In a Maricopa County mobile-food inspection dated June 24, 2025, a refrigerator was recorded at 78°F when the cited requirement was 41°F or below. Source: Maricopa County inspection report. This is one inspection record, not a rate for mobile food units generally.
What establishment profiles and inspections show
The CDC report included different types of retail establishments. Restaurants accounted for 712 of 875 outbreak-linked establishments, or 81.4%. Other retail establishments, including caterers or mobile food units, accounted for 163, or 18.6%. Because the mobile units are grouped with other establishments, the report does not provide a food-truck-only outbreak percentage.
Among the 725 establishments for which managers were interviewed, independent establishments represented 473, or 65.2%. Establishments serving 300 or fewer meals daily represented 440, or 60.7%. The daily-meal breakdown was:
- 176 establishments, or 24.3%, served 100 or fewer meals.
- 155, or 21.4%, served 101–200 meals.
- 109, or 15.0%, served 201–300 meals.
Complex food preparation was reported for 735 of the 875 outbreak-linked establishments, or 84.0%. American menu types were reported at 485 establishments, or 55.4%. At least one critical violation on the last routine inspection appeared at 624 establishments, or 71.3%.
Source: CDC, Foodborne Illness Outbreaks at Retail Food Establishments, 2017–2019.
A prior critical violation is a signal found among outbreak-linked establishments, not proof that the violation caused a later outbreak. Likewise, the high share of complex-preparation establishments describes the investigated group and should not be generalized to all food trucks.
Local inspection systems provide a different kind of safety measurement. Boston’s Health Division says it inspects all restaurants and mobile food trucks at least once per year. Its scoring system starts each restaurant or food-truck inspection at 100 points, and a foodborne critical violation, such as unsafe food temperatures, receives a 10-point penalty. Source: Boston Inspectional Services, How we grade restaurants and food trucks.
Ill-worker reporting and exclusion controls
Worker illness policies were common in the CDC’s outbreak-linked establishment group, but coverage was not universal and policy details varied.
A policy requiring food workers to tell a manager when ill was reported by 665 of 725 establishments, or 91.7%. Among those 665 establishments, 439, or 66.0%, said the policy was written. A total of 504, or 75.8%, required workers to report symptoms.
The symptoms named in those policies were unevenly distributed:
| Reportable symptom | Establishments | Share among 665 with a policy |
|---|---|---|
| Vomiting | 452 | 68.0% |
| Sore throat with fever | 328 | 49.3% |
| Lesion with pus | 265 | 39.8% |
| Jaundice | 182 | 27.4% |
A policy restricting or excluding ill food workers was reported by 620 of 725 establishments, or 85.5%. Among those 620 establishments, 387, or 62.4%, said the policy was written. Paid sick leave for any workers was reported by 316 establishments, or 43.6%.
Source: CDC, Foodborne Illness Outbreaks at Retail Food Establishments, 2017–2019.
These numbers distinguish having a policy from having a written policy, and both from reporting specific symptoms or providing paid leave. They also come from establishments associated with investigated outbreaks, so they should not be treated as a current compliance survey of every mobile food business.
Evidence from mobile-vendor studies
A 2003 study described a New York City operating context with more than 4,100 mobile food vendors. Approximately 40% were described as processing vendors. The study’s Manhattan pilot directly evaluated 10 processing mobile food vendors, observing each vendor for 20 minutes.
During those observations, bare-hand contact with served food was seen at 67% of the 10 vendors. Previously cooked meat was stored at unsafe temperatures at 7 of the 10 vendors. Source: Safety of vendor-prepared foods: evaluation of 10 processing mobile food vendors in Manhattan.
Because the pilot involved 10 vendors and dates to 2003, its percentages are historical observations from a small sample. They are useful for identifying handling and temperature-control concerns, but they are not a current citywide estimate or a national food-truck rate.
A separate investigation in Alberta, Canada, covered October 2010 through February 2011. It identified 91 laboratory-confirmed Salmonella Enteritidis outbreak cases. Food prepared by the implicated caterer was reported by 85 of the 91 patients in the prior seven days. The outbreak included 78 cases among lunch-truck customers, and six of the 91 patients, or 7%, were hospitalized.
This was a specific outbreak investigation, not a prevalence study of lunch trucks. Its value is in showing how a mobile-food exposure can appear within a defined outbreak record, while its geography, caterer, period, and Salmonella findings remain specific to Alberta.
Food truck fire, propane, and inspection measurements
Food truck safety also includes fire and fuel systems. A Milford, New Hampshire fire memo reported at least 10 food-truck or trailer explosions and fires during the year preceding April 4, 2023. The memo said those incidents seriously injured 12 people and caused at least $100,000 in damage, described as hundreds of thousands of dollars.
The same memo cited a New Hampshire mobile-cooking requirement calling for LP-gas leak-detection systems to be tested at least once per month. It put the approximate price of a compliant propane detector at $50–$150 and said propane detectors can remain in service for five years or more before replacement.
Source: Milford, New Hampshire, Memo Regarding Food Truck Safety Requirements.
The Milford figures are local memo evidence and are not a national fire rate. The monthly testing interval and detector information are requirements and guidance cited by that memo, not measurements of how often operators complied.
Taken together, the available statistics point to a layered safety picture. CDC outbreak data emphasize contamination, illness, cooling, and cooking controls. The Manhattan observations provide historical mobile-vendor evidence about bare-hand contact and previously cooked meat. The Alberta investigation documents a defined lunch-truck-associated outbreak. Local sources add inspection scoring, refrigerator-temperature evidence, and propane safety requirements. None of these sources alone supplies a national, mobile-food-truck-only safety series.