Residents and farmers say contractors have tapped border aquifers that threaten water supply for those nearby

Construction crews building a border wall in New Mexico were ordered to stop drilling new wells after ranchers said that pumping groundwater to produce concrete could threaten their livestock amid a severe drought.

The order comes as crews across the southern border race to complete one of Donald Trump’s highest domestic priorities – barriers that span four states and received over $46bn in federal funding. Controversies have sprouted up in Texas and California, and border-town residents and environmentalists have reported a wide variety of issues with construction.

At a public meeting in July, ranchers said they were noticing unmonitored tapping of border aquifers that threatened the water for those nearby.