Have a legal question about a vehicle accident or injury claim in Idaho? We're here to help.
March 11, 2026
Health officials are investigating an E. coli O157:H7 outbreak linked to raw milk produced by R Bar H Dairy in Caldwell, Idaho. At least 11 people have been sickened, including several hospitalizations and two cases of hemolytic uremic syndrome (HUS). The earliest known illness began around January 12, 2026, according to the outbreak epidemiological curve.
Latest Updates – Caldwell Idaho Raw Milk E. coli Outbreak
March 2026 – Investigation Ongoing
Public health officials in Idaho continue investigating the outbreak associated with raw milk products produced by R Bar H Dairy in Caldwell.
Investigators have identified 11 confirmed and probable infections, including multiple hospitalizations. Two individuals developed hemolytic uremic syndrome (HUS), a serious complication that can lead to kidney failure.
The investigation remains ongoing.
At Least 11 People Sickened in Idaho E. coli Outbreak
According to epidemiological information released by Idaho public health investigators, 11 individuals have been identified as part of the outbreak cluster.
Among these cases:
- 3 confirmed infections with Shiga toxin–producing E. coli
• 8 probable cases
• 3 hospitalizations
• 2 confirmed HUS cases
• No deaths reported
The ages of patients range from 1 year old to 75 years old, with a median age of 15 years.
Children represent a significant portion of those affected:
- 27% of cases were children under age 5
• 18% were between ages 6 and 17
Young children are particularly vulnerable to complications from E. coli infections.
Most Patients Reported Drinking Raw Milk
Investigators interviewed patients to determine possible exposures.
The investigation found:
- 10 of the 11 individuals who became ill reported drinking R Bar H raw milk
• Only one individual reported not drinking raw milk
This strong exposure pattern indicates that raw milk produced by the Caldwell dairy is a likely source of the outbreak.
Where the Raw Milk Was Purchased
Investigators identified several retail locations where raw milk associated with the outbreak was purchased.
Reported purchase locations include:
- Ridley’s – Star, Idaho
• Boise Co-Op – Boise
• Cliff’s Country Market
• Gray Day Flower Farm farmstand – Weiser
These purchase locations show that the raw milk was distributed across the Treasure Valley region of southwest Idaho, including Caldwell, Nampa, Boise, and surrounding communities.
About R Bar H Dairy in Caldwell, Idaho
R Bar H Dairy is a raw milk producer located in Caldwell, Idaho in Canyon County.
The dairy distributes raw milk products through multiple retail locations across the Treasure Valley region, including Boise, Nampa, Star, and nearby communities.
Timeline of the Idaho Raw Milk E. coli Outbreak
January 12, 2026
First known illness onset reported in the outbreak.
Mid-January 2026
Additional illnesses reported with symptoms consistent with Shiga toxin–producing E. coli infection.
January 29, 2026
Investigators collected a chocolate milk sample associated with the dairy.
February 2, 2026
A chocolate milk product was collected from a retail location for laboratory testing.
February 3, 2026
A raw milk container sample was collected during the investigation.
February 6, 2026
Environmental samples were collected from the dairy’s bulk tank and milk filler machine.
February 2026
Laboratory testing confirmed E. coli O157:H7 infections in several patients.
March 2026
Public health investigators identified 11 confirmed and probable cases.
Raw Milk Purchase Locations Associated With the Outbreak
Milk Samples Collected During the Investigation
As part of the outbreak response, investigators collected several product and environmental samples.
Samples tested by the Idaho Bureau of Laboratories included:
- Raw milk container samples
• Raw milk bulk tank samples
• Dairy processing equipment samples
• Chocolate milk product samples
Laboratory testing reported no detection of Shiga toxin–producing E. coli in these samples.
Why Contaminated Food Often Tests Negative
Food samples collected during outbreak investigations frequently test negative even when illnesses occur.
Several factors explain this:
Contaminated products may already be gone
Many outbreaks are discovered after contaminated food has already been consumed.
Contamination may occur intermittently
Bacteria may only be present in certain batches.
Sampling may miss the contaminated product
Investigators can only test products available during the investigation.
For this reason, investigators rely heavily on:
- Patient interviews
• Illness timelines
• Genetic sequencing of bacteria
• Exposure patterns
Symptoms of E. coli Infection
Common symptoms of E. coli O157:H7 infection include:
- Severe stomach cramps
• Diarrhea (often bloody)
• Vomiting
• Fever in some cases
Symptoms usually begin 3–4 days after exposure, although they may appear anywhere from 1 day to more than a week later.
What Is Hemolytic Uremic Syndrome (HUS)?
One of the most serious complications of E. coli infection is hemolytic uremic syndrome (HUS).
HUS occurs when toxins produced by E. coli damage small blood vessels and impair kidney function.
Symptoms may include:
- Decreased urination
• Extreme fatigue
• Pale skin
• Easy bruising
• Kidney failure
Children and older adults face the greatest risk.
Two patients associated with this outbreak developed confirmed HUS.
Legal Rights After Foodborne Illness
Food producers, farms, distributors, and retailers have a legal responsibility to ensure that food products sold to consumers are safe.
When contaminated food causes illness, victims may be entitled to compensation for:
- Medical expenses
• Lost wages
• Pain and suffering
• Long-term health complications
• Kidney damage or other serious injuries
Foodborne illness cases often rely on public health investigations and epidemiological evidence to establish liability.
Speak With an E. coli Outbreak Attorney
Foodborne illness cases are time-sensitive because important evidence can disappear quickly.
If you or a loved one became ill after consuming raw milk products associated with the Caldwell or Treasure Valley outbreak, you may have legal options.
Our firm represents victims of E. coli infections and other foodborne illness outbreaks nationwide.
Contact our office today for a free consultation to discuss your potential case.
Frequently Asked Questions About the Idaho Raw Milk E. coli Outbreak
How many people were sickened?
Public health investigators identified 11 confirmed and probable cases.
What strain caused the outbreak?
Laboratory testing confirmed E. coli O157:H7.
Were people hospitalized?
Yes. Three individuals were hospitalized, and two developed hemolytic uremic syndrome (HUS).
Did milk samples test positive for E. coli?
Environmental milk samples collected during the investigation tested negative, although epidemiological evidence strongly links raw milk consumption to the illnesses.
