New Iowa Incentives Aim to Reduce Nitrate Pollution in Rivers

The Iowa Department of Agriculture is expanding financial incentives for farmers to plant cover crops to reduce nitrate pollution flowing into central Iowa’s drinking water supply.

Beginning this year, farmers in 22 counties within the Des Moines and Raccoon River watersheds will be eligible to receive $25 per acre for planting cover crops for up to 500 acres, a significant increase from the previous limit of 160 acres. State officials estimate the initiative will add roughly 100,000 acres of cover crops, doubling participation within the targeted watershed.

The expanded program comes after Central Iowa Water Works imposed its second consecutive summer lawn watering ban as elevated nitrate levels strained the region’s water treatment system serving approximately 600,000 residents.

Cover crops such as cereal rye help reduce soil erosion and absorb excess nitrogen and phosphorus before those nutrients can wash into rivers and streams. According to the Iowa Department of Agriculture, cover crops can reduce nutrient losses from farm fields by approximately 30% while also improving soil health.

The program is part of Gov. Kim Reynolds’ broader $312 million, 12-year water quality initiative, which also includes funding for expanded nitrate treatment, wastewater improvements, water quality monitoring, and rural infrastructure.

Water quality has become an increasingly prominent issue in Iowa’s 2026 elections as voters raise concerns about nitrate contamination, pesticide runoff, PFAS (“forever chemicals”), and potential links to public health.

The announcement also highlights the continuing debate over Iowa’s conservation strategy.

Agriculture Secretary Mike Naig argues voluntary conservation efforts are making measurable progress, pointing to the growth of cover crop acreage, new wetlands, and nitrate-reducing buffer installations across the state.

Critics, including Democratic challenger Chris Jones, argue the current approach is not reducing pollution quickly enough and support additional regulatory measures such as mandatory buffer strips along waterways and stronger manure management requirements for large livestock operations.

Currently, approximately 4 million acres of Iowa farmland use cover crops. This is more than 400,000 acres from a decade ago but still representing only about 17% of the state’s cropland.

Our Take

Expanding cover crop incentives is a positive step. Few people question whether cover crops improve soil health, reduce erosion, and help keep nutrients out of Iowa’s rivers. Increasing financial assistance may encourage more farmers to adopt conservation practices, particularly during a period of tight agricultural margins.

The larger question is whether the pace of adoption is sufficient. While Iowa has made substantial progress over the past decade, most cropland still does not utilize cover crops, and Central Iowa has now experienced consecutive years of water use restrictions because of elevated nitrate levels.

The policy debate is increasingly shifting away from whether conservation works to whether voluntary conservation alone can achieve Iowa’s long-term water quality goals.

As candidates campaign across the state this year, voters are likely to hear more discussion about balancing agricultural productivity, public health, conservation incentives, and potential regulatory approaches.

For most Iowans, the common objective remains the same: cleaner water, healthy farms, and practical solutions that protect both.