Back in 2003, when researchers began predicting with excellent accuracy how much of western Lake Erie would be coated with the green slime of a toxic algae bloom, there were important points to be made.

The annual forecasts, largely funded with $20 million annually from the National Oceanic and Atmospheric Administration, provided water quality regulators and public health authorities in the U.S. and Canada real-time assessments on where the poisonous algae, which is capable of killing dogs and sickening people, could wash up on public beaches.

The forecasts were prime evidence of whether federal and state environmental specialists were making any progress on limiting the torrent of phosphorus and nitrate pollution from agriculture that causes the blooms.

Forecasters got so good at predicting the expanse of the Lake Erie bloom that they decided earlier this decade to make a show of it and livestream the annual forecast, which is now held on South Bass Island, offshore of Toledo. This year, according to the forecast announced in June, the Lake Erie bloom will be “moderate,” neither as large as some years since 2011, nor as small as others since 2016.

Yes, the forecasting is an impressive display of computer modeling and scientific acumen. But here’s the rub for Lake Erie and for iconic water bodies around the country – Chesapeake Bay, Gulf of Mexico, Lake Okeechobee, Saginaw Bay, and eight others – where NOAA and its state and university contractors are conducting similar annual measurements of harmful algal blooms: The forecasts have become irrefutable evidence of immense ecological negligence. They are an annual accounting of government’s persistent inability to control discharges of farm fertilizer and manure that now are the largest source of water contamination in Lake Erie, the other Great Lakes, and in streams, rivers, lakes, and bays across much of the rest of the country.