Jump to main content or area navigation.

Contact Us

TRI Explorer

Release Reports

Tri Metadata Click for help on this criterion

Underground injection is the subsurface emplacement of fluids through
wells. TRI chemicals associated with manufacturing, the petroleum
industry, mining, commercial and service industries, and Federal and
municipal government related activities may be injected into class I, II,
III, IV, or V wells, if they do not endanger underground sources of
drinking water (USDW), public health or the environment. Class II wells
are oil and gas related wells which re-inject produced fluids for
disposal, enhanced recovery of oil, or hydrocarbon storage. Class III
wells are those wells associated with the solution mining of minerals.
Class IV wells are those wells which may inject hazardous or radioactive
fluids directly or indirectly into USDW, only if injection is part of an
authorized CERCLA/RCRA clean up operation. Class V wells, which include
all types of injection wells which do not fall under I-IV, may inject only
if they do not endanger USDW, public health or the environment. Class V
wells are, generally, shallow drainage wells, such as floor drains
connected to dry wells or drain fields. Data from Section 5.4 on the TRI
Form R.

Release Reports Metadata

Top of Page

Jump to main content.