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On July 1, 2018, all six New England states officially transition to ultra-low sulfur heating oil (ULSHO), containing a maximum 15 parts-per-million (ppm) sulfur.

When ULSHO is mixed with biofuel, the resulting blend, commonly known as Bioheat® Fuel, is cleaner, more efficient and more environmentally secure than both heating oil and natural gas.

While the 15 ppm standard applies to heating oil in all six New England states, in certain states sulfur reductions may also apply to other fuels such as kerosene and heavy/residual fuel oil.

In order to help ensure a smooth transition, at the request of NEFI’s state association partners, state agencies have issued guidance documents pertaining to the ultra-low sulfur phase-in. Certain states have also established specific exemptions and/or enforcement discretion periods.

To find out more, download the document for your state(s) below.