DENVER -- The city of Albuquerque., N.M., has appealed a federal court ruling requiring Albuquerque to comply with costly water standards for the Rio Grande.

The appeal was filed Tuesday in the 10th District Court of Appeals in Denver. The case pits Albuquerque against the Environmental Protection Agency, which is upholding the Isleta Pueblo's right to apply strict water standards for the city's water treatment plant located five miles upstream from the Pueblo.

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