A council has called for more guidance over the use of wireless broadband in schools.
Wi-fi allows cable-free web access, but some scientists fear it emits radiation similar to mobile masts, which have been linked to cancer.
The Health Protection Agency said emissions were within safety guidelines but Carmarthenshire Council said more advice was needed.
One school in the county has already removed its wi-fi connections.
That has left nine others using the technology.
Carmarthenshire Council's executive board has agreed to draw up a code of practice for schools using wi-fi, but said more information was needed.
Executive board member for education Ieuan Jones said: "We are going to monitor the situation as closely as we can because we all have these concerns.
"The dangers of these wi-fi connections are possibly along the lines of using hand-held mobile phones."
Former teacher Judith Davies, whose daughter attends Ysgol Pantycelyn in Carmarthenshire, has been leading the campaign in the county for strict conditions on the use of wi-fi.
She said: "I had hoped that there would be a moratorium but I'm glad that there will be a code of practice."
She said this should include insisting children should not put lap tops on their laps.
"I think it is very important that the transmitters are positioned as far away from the children as possible and at the lowest that is needed.
"It is very important that parents are informed if wi-fi is in their school."
First published on the bbc Wales news site |
Wi-fi allows users to log onto the internet without a cable connection