CARL RUSSO/Staff photo. Greater Lawrence Sanitary District and Haverhill released untreated sewage to the Merrimack River during Monday's heavy rains. This is second time in last few months. Where do planned improvements stand to keep this from happening? 4/18/2018

180418CRUSEWERNEWS Greater Lawrence Sanitary Districtuntreated sewage to the Merrimack River during monday's heavy rains.