IA Well Driller study guide
IA Well Driller · Work through your exam, one topic at a time.
The Iowa DNR Well Contractor Certification - commonly called the Iowa Well Driller certification - is the state credential a person holds in order to construct, reconstruct, or plug water supply wells in Iowa. It is administered through the Iowa DNR Private Well Program, which sits under Environmental Protection Water Quality, and it targets working drilling contractors and their crew leadership rather than homeowners or pump installers alone. The IA Well Driller study guide has 8 sections and about 2,456 words.
01Iowa Statutes, Administrative Rules, and Contractor Certification
This domain tests the legal architecture behind Iowa well work: which statute grants authority, which administrative rules set technical standards, and who may legally construct, reconstruct, or plug a well. Expect questions that separate the role of the Iowa Legislature from the role of the Department of Natural Resources (DNR).
318 words, about 2 min02Well Siting, Isolation Distances, and Source Water Protection
This domain tests whether a proposed well location protects drinking water from contamination. The exam expects you to apply Iowa isolation distances, evaluate drainage and flooding, and recognize source-water threats that are not captured by a simple tape measure.
338 words, about 2 min03Drilling Methods, Borehole Construction, and Subsurface Geology
This domain tests how the hole is made and how the borehole is kept open long enough to install casing and grout. Questions often compare drilling methods, ask about overburden versus bedrock, or require you to spot a borehole diameter that cannot produce a proper annulus.
302 words, about 2 min04Casing, Screens, and Annular Space Sealing and Grouting
This domain tests the barrier between contaminated surface water and the aquifer. Casing holds the hole open; grout seals the annulus; the screen admits water while holding back formation material.
326 words, about 2 min05Well Development, Disinfection, and Water Quality Testing
This domain tests what happens after construction: removing drilling fines, restoring yield, disinfecting the well, and proving the water is safe. Expect questions on development methods, chlorine contact time, sampling technique, and which tests are routinely required.
308 words, about 2 min06Pump Installation, Pitless Adapters, and Wellhead Completion
This domain tests the finished system: pump selection, drop pipe, pitless adapter, electrical protection, and a wellhead that stays sanitary and freeze-free. Questions often describe a shortcut installation and ask what is wrong.
282 words, about 1 min07Abandoned Well Identification and Plugging
This domain tests whether a well is abandoned and how it must be sealed so it cannot act as a direct path for contamination. Expect questions on notification, approved fill material, casing removal, and flowing wells.
293 words, about 1 min08Jobsite Safety, Equipment Operation, and Discharge Compliance
This domain tests the field realities that can shut down a job: rigging, electrical safety, silica dust, confined spaces, utility locating, and what happens to the water and cuttings the rig produces. Questions often ask for the first control, not the cleanup.
289 words, about 1 min