Southern Tier — traveling into the triangle

Macomb, St. Clair, Sanilac, Oakland and Lapeer counties per their site — and they surface in local well searches across the whole triangle

Around-the-clock drilling and repair company (their site advertises 24/7 service and a 24-hour line). Pumps, tanks, filtration and agricultural irrigation for residential, commercial and farm customers — free estimates and in-home consultations.

Genesee, Lapeer, Saginaw and Shiawassee counties (their site)

Third-generation family repair shop out of Flushing — Saginaw County is inside their stated service area. New wells, pump and tank replacement, and iron-filter upgrades on the treatment side.

Genesee County and surrounding

Repair specialist, not a driller — pumps, pressure tanks, well cleaning and water-quality solutions, working out of Clio. Their number is listed from their Google profile; their simple website doesn't publish one.

Genesee County and into the triangle

Davison drilling and service shop — one of the Genesee County names that shows up in Saginaw-area searches.

Lapeer County and surrounding

Pump-and-tank pure-play out of Lapeer — the exact specialty a “no water” call needs. Well reviewed locally at listing time.

Livingston, Oakland and Washtenaw counties plus surrounding (their site)

Repair pure-play with 25+ years claimed on their site, serving homeowners, realtors and landlords. The full inspection-and-water side: testing, chlorination, and tailored treatment options — and they state 24/7 emergency service.