A strange white sludge that flowed through washes in the Entrada neighborhood during last years monsoon is again raising alarms, after similar material surged down the same path this fall, hardening wash sand to the texture of concrete.

Residents say the repeated incidents show the state has not properly investigated the source and theyre urging the Arizona Department of Environmental Quality to expand testing and take stronger enforcement action against the Cimbar Resources mining operation upstream.

Entrada resident Chris Naylor remembers the moment he first saw the material on August 19, 2024. This wash right here flooded, and it was the only one in the neighborhood, he recalled. When I started looking, I noticed there was a white material. It was like a sludge-like material, and it s

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