Port Arthur has an area of 373.4 km², but the population is not huge. This is understandable because about 46% of the city is covered by water. In fact, Port Arthur is one of the cities that has consistently recorded a decrease, and not increase, in population. However, Motiva Refinery, the largest oil refinery in the U.S., is located in this city. The inhabited portion of the city lies within Jefferson County, but some uninhabited section extends into Orange County. Inhabitants of Port Arthur who are suffering from opioid addiction may visit a methadone clinic Port Arthur Tx for medical assistance. Methadone, a drug for treating opioid use disorder, has been found so effective that it made the World Health Organization’s list of essential medications. It is approved by the Food and Drug Administration as a safe and effective medication for opioid addiction. People experiencing opioid dependency have an uncontrollable craving. Methadone reduces the craving and blocks the effects of opioids in the body, making the program enrollee function well socially. Doses, available in different forms, are tailored for individuals and prescribed in combination with counseling and behavioral therapies. This is not difficult for most methadone clinics in Texas to handle because they provide additional social services.