The United States government sued the state of Florida in 1988 for failing to manage farm runoff that was polluting waters in Everglades National Park, an area of high biodiversity. A negotiated settlement implemented in 1994 required phosphorus concentrations to be reduced by nearly 60% by 2006, from 24 to 10 parts per billion (ppb).
By 2016, concentrations had dropped to a five-year average of 9 ppb. What can we learn from how this was achieved?
The Everglades comprise 1.5 million acres (600,000 ha) of wetlands – the largest remaining subtropical wilderness in the United States. Draining into this wilderness is the 300,000 ha Everglades Agricultural Area (EAA), home to Florida’s multibillion-dollar sugar industry (80% of farmed area), along with some vegetable and rice production.
To achieve the stringent water quality targets, the court settlement employed a dual strategy. The first measure: Reduce phosphorus runoff from farms by 25% through adoption of ‘best management practices’ (BMPs). And second: Convert over 14,000 ha of farmland to new stormwater treatment areas, effectively constructed wetlands, to remove additional phosphorus before water flows into the Everglades (EAA farms were taxed to help pay for their construction).
No farm faces individual penalties – as long as an overall 25% reduction is achieved and maintained.
Farmer representatives successfully argued for compliance to be assessed for all EAA farms collectively rather than for individual farms, to minimise regulation of farming practices. No farm faces individual penalties – as long as an overall 25% reduction is achieved and maintained.
Collective responsibility for achieving the target has encouraged sharing of information between farmers, regulators, and extension agents. The regulations required each farm to have a BMP plan that targeted (1) fertilizer application, (2) soil erosion, and (3) less frequent operation of drainage pumps that carry sediment through canals. Farms were required to adopt BMPs in each category, but could choose from a list of the BMPs they felt would work best for their farm.
The sugar industry in this area is highly concentrated, which probably made cooperation easier. Two farms, Florida Crystals and US Sugar, together cultivate more than two-thirds of the EAA’s farmland. A third company, the Sugar Cane Growers Cooperative, has 45 member farms and accounts for nearly one-quarter of the EAA.
Cooperation took many forms:
The result? EAA farms have averaged annual phosphorus loads 55% below their baseline, maintaining compliance every year since 1994. Water quality in the Everglades has improved as a result, with more than 90% of monitoring sites at or below 10 ppb.
Farmers noted that the regulations forced them to pay closer attention to their farm management decisions, while the monitoring made water quality relevant and provided valuable feedback on the effectiveness of their decisions. Compelling evidence was provided by the reduction in phosphorus runoff after the first year of regulations, without reduction in crop yields.
Although compliance is determined collectively, a published map of monitoring data enables farmers to recognise their neighbours’ performance and see which farms are contributing the most or least to improving water quality. This encouraged some farmers to seek their neighbour’s advice on reducing runoff.
Farmers and extension agents reported feelings of pride associated with low phosphorus runoff and conversely a concern when phosphorus levels are increasing.
Through their involvement in creating the BMPs, farmers made harmful practices less socially acceptable and collectively redefined what counts as a good farmer.
Through their involvement in creating the BMPs, farmers made harmful practices less socially acceptable and collectively redefined what counts as a good farmer. Allowing farmers to choose from a list of BMPs supported a key aspect of devolving responsibility to farmers – the pride associated with demonstrating one’s skill at farming.
In the EAA, pride and peer pressure were important motivations, alongside other socially acceptable justifications such as reduced costs. Sharing information was a key part of collective action to improve BMP effectiveness to maintain group compliance.
It hasn’t all been smooth sailing. As predicted by environment groups who opposed the group compliance provisions, adoption of BMPs by farmers has been variable, resulting in ‘hot spots’ of high phosphorus concentrations.
Farmers adopted BMPs from the agreed list without necessarily considering whether a chosen BMP was the most appropriate for their farm.
The two large farms and 33 of the co-op farms reduced their phosphorus loads, substantially in many cases, but about one-third of all farms, and 45 out of 173 basins (sub-catchments), have increased their phosphorus runoff. In five basins, phosphorus loads are still more than 3.5 kg/ha, which is higher than the pre-regulation average for the EAA.
Other problems also continue to plague the Everglades: reduced inflow, algal blooms and – luckily less of a concern for Kiwi farmers – invasive Burmese pythons.
There need to be specific reduction targets and local water quality standards, with consequences if these are not achieved
Although the Florida Everglades may seem a world away, there are several things we can learn from how farm runoff has been reduced there:
What do you think we can learn from the Florida Everglades? In New Zealand, how would catchment groups respond to this approach, and what roles might tangata whenua play? Leave a comment below and contribute to the conversation!