Arrested for Hemp? Why SC Police Still Struggle with Roadside THC Testing

Hemp is legal federally and in South Carolina, but it must have very low THC levels. Police often struggle to tell them apart during traffic stops because hemp and marijuana look and smell the same. This has led to innocent people being searched or arrested.

Currently, roadside tests can only detect if THC is present. They cannot measure the exact amount. Because of this "gray area," law enforcement leaders in South Carolina are asking lawmakers to either ban intoxicating hemp products or create much stricter rules. As of early 2026, the state is considering new bills to regulate these products and provide better testing tools for officers.

What Is Hemp and How Is It Different from Marijuana?

Hemp and marijuana are both types of the Cannabis sativa plant, but they have different legal rules. Hemp is legal because it has 0.3% or less THC. Marijuana has more THC and is illegal in South Carolina.

The 2018 Farm Bill made hemp legal across the country. However, both plants look and smell the same. This makes it very hard for people to tell them apart without expensive lab testing.

Why 0.3% Matter?

That small 0.3% threshold marks the legal boundary. A plant with 0.31% THC can be treated as illegal marijuana under South Carolina law, while one with 0.29% qualifies as hemp. This narrow margin makes enforcement highly technical and often confusing for both officers and the public.

Why Roadside THC Testing Still Falls Short

Police across South Carolina face a basic challenge during traffic stops. Their field tests can detect the presence of THC, but they usually cannot measure the amount. That distinction is important because hemp is legal if it contains no more than 0.3% delta-9 THC. A legal hemp product can still produce a positive result, even though it is not illegal marijuana. This gap creates confusion at the very start of an investigation.

Detection Without Measurement

Most roadside drug tests only show if THC is present. They do not show the exact amount of THC. This means a test can show a positive result even if the product is legal hemp.

This is very different from alcohol breath tests. Breathalyzers can measure alcohol levels on the spot. Currently, there is no handheld device that can instantly measure the THC percentage in a plant. Because of this, officers may suspect a person has illegal marijuana even when the product is actually lawful hemp.

This gap leaves police unsure if a crime has happened. To be sure, officers must send samples to a state laboratory for detailed testing.

Lab Testing Is the Only Clear Answer

To prove that cannabis is illegal marijuana under South Carolina law, authorities must show that the THC level is above 0.3%. That requires formal laboratory testing.

When officers seize a product, it must be sent to a state lab for chemical analysis. These tests can measure THC levels accurately, but they take time and use limited resources. Until the results return, the product’s legal status is unclear.

This process raises costs for law enforcement and prosecutors. It also creates stress for people who may have been carrying legal hemp. Over time, the delays can add up and lead to testing backlogs.

Backlogs Slow Down Justice

State labs process many types of evidence, so THC cases can wait weeks or even months before testing is complete. In some areas, including near Greenville, law enforcement agencies have reported long delays after seizures.

These delays can slow court cases and extend uncertainty. In some situations, people may face charges or attend court before a lab confirms whether the substance was illegal.

Legal Confusion on the Ground

Police and prosecutors must show that a substance is both cannabis and illegal marijuana before filing charges. Hemp and marijuana look and smell the same, so officers often rely on odor during traffic stops. That method is now questioned in many states because it cannot confirm THC levels.

In South Carolina, arrests still occur based on suspected marijuana possession, even though roadside tests cannot prove whether the product exceeds the legal THC limit. Only lab testing can confirm that, and labs are not always available right away or equipped to handle every case quickly.

Law enforcement leaders have acknowledged this problem. They say the growing hemp market has created a gray area, especially when some products labeled as hemp contain intoxicating forms of THC.

Recent Enforcement Actions Highlight the Problem

In late 2025, South Carolina authorities launched a major operation called “Ganjapreneur” targeting distributors selling products that tested above legal THC limits. The crackdown led to 12 arrests and the seizure of more than 30,000 pounds of THC products, which law enforcement said were illegal under state-controlled substances laws.

The operation highlights how seriously officials are treating illegal THC distribution. It also shows how difficult it is to tell legal hemp from illegal marijuana without reliable testing. While law enforcement stresses the need for testing, critics argue that until it is consistent and accessible, ordinary people and small businesses risk being unfairly targeted.

Lawmakers Weigh Regulation Versus Bans

Due to the challenges, South Carolina lawmakers are debating how to handle THC and hemp products. Some want to ban intoxicating hemp products entirely. They argue that the rules are too hard to enforce fairly. Others want to set clear limits, age requirements, and testing rules. This would allow the market to operate safely without putting innocent people at risk.

Police Perspective

Recently, police chiefs and sheriffs asked lawmakers not to legalize these products. They said the rules would be too difficult to follow. They also believe it would make the legal lines even more confusing. They insist that reliable enforcement is only possible with stricter rules or a total ban.

Regulation or Ban

Lawmakers are also deciding whether to allow regulated hemp drinks. These would have strict THC limits and age requirements. Another option is to ban almost all hemp products that people can consume. These debates show the daily challenges police face on the roads and in stores.

People’s Perspective

For everyday people, these enforcement issues can have serious consequences. You could face an arrest, high court costs, or a criminal record, even if you only use legal hemp. Many people believe that federal law protects them, but South Carolina’s enforcement is much stricter.

Conclusion

South Carolina’s issues with roadside THC testing show how even a tiny legal difference of 0.3% THC can cause major enforcement problems. Police lack reliable tools to distinguish legal hemp from illegal marijuana on the spot. This has led to confusion, long lab backlogs, and calls for clearer laws to protect consumers and support fair policing. As lawmakers consider solutions, the gap between science, law, and daily life remains a key challenge in the state’s cannabis landscape.