The Slovak National Centre for Human Rights has mapped experiences of threats, intimidation, harassment and restrictions of rights faced by human rights defenders and civil society in the field of environment protection. The research aimed to find out whether cases of harassment occur, and, if they do, what their nature is and whether they are reported to public authorities. The information was collected via questionnaires which asked respondents to detail their experiences. The NHRI collected 11 cases considered by respondents as a threat, harassment, or intimidation. Harassment of and slander against individuals or their families were most common. Additionally, threats and the use of administrative procedures as a form of harassment (e.g. complaints, criminal reports) were prevalent. In most cases, human rights defenders sought to defend themselves by legal means and addressed existing public authorities. However, human rights defenders perceived the options available to defend their rights as very limited.