Well Water and Groundwater Rules in Adams County, Nebraska

The statewide baseline: registration, permits, and setbacks

Every well in Nebraska, Adams County included, is built under Nebraska Administrative Code Title 178, Chapter 12, which sets minimum construction, pump-installation, and decommissioning standards and requires at least a 100-foot separation between a well and contamination sources such as septic tanks, septic drainfields, and animal waste lagoons (a driller can request a written exception with a full-length bentonite seal if that distance genuinely can't be met on a specific site). A domestic well pumping 50 gallons per minute or less generally only needs to be registered with the state -- currently a $70 fee, due within 60 days of completion -- through the licensed well contractor who drilled it. A well designed to pump more than 50 gpm, which covers most irrigation and many livestock wells, needs an actual drilling permit from the governing Natural Resources District before construction starts, not just a post-completion registration.

Because Adams County splits between the Upper Big Blue NRD and the Little Blue NRD along watershed lines rather than the county line, which office actually issues that drilling permit -- and which district's nitrate-testing rules apply once the well is in service -- depends on exactly where the parcel sits. Confirm the governing NRD for a specific parcel before assuming either district's rules, fee schedule, or contact office applies.

Nitrate zones and testing: two different systems on the two sides of the county

Upper Big Blue NRD manages groundwater quality through 12 separate Management Zones, each assigned a management phase based on the median nitrate value from a network of monitoring wells selected for that zone's construction and geology. A zone with a median nitrate reading below 7.0 parts per million gets resampled once every three years; a zone above that threshold is sampled annually. Zones the district has designated Phase III carry a real operator obligation, not just district monitoring: operators within a Phase III zone must have their own irrigation water tested for nitrates at least once every three years. As of the sources reviewed for this page, Zones 5, 6, and 11 sit in Phase III -- if a parcel's irrigation well falls in one of those zones, budget for that recurring testing requirement, and confirm current zone boundaries and phase status directly with the district rather than assuming they're unchanged.

Little Blue NRD runs a differently structured program: the entire district was declared a Water Quality Level I Management Area in 1996, which centers on fertilizer- and water-management education rather than zone-by-zone phase escalation. The district has monitored nitrate levels since the early 1990s, and in parts of its territory levels have already exceeded the 10 ppm federal health standard, with contamination trending upward in others. Little Blue's escalation trigger is different from Upper Big Blue's zone-phase system: when sampling shows 70% of the maximum contaminant level (MCL) reached in 60% or more of at least five sampled wells within an area, the district board takes action to define a sub-area boundary and put specific controls in place. A parcel's well-testing obligations and any sub-area controls therefore depend on which district actually governs it -- the two systems aren't interchangeable, and a rule of thumb from one side of the county won't describe the other.

The Hastings plume in 2024-2025: thermal remediation and an active institutional control area

The Hastings Ground Water Contamination Superfund site's remedy includes an institutional control area (ICA) that Hastings Utilities administers specifically to prevent unauthorized access to contaminated groundwater within the affected zone -- a live, ongoing restriction layered on top of ordinary well permitting, not just a historical footnote. Cleanup work has continued to advance: EPA installed thermal wells at the site's Second Street Subsite that began operating in August 2024 and were expected to run through roughly July 2025, treating soil and groundwater contamination at that specific subsite. The broader remedy has historically included providing an alternate water supply to affected users, a private-well inventory, and ongoing groundwater monitoring dating back to a program EPA started in 2001.

For a parcel in or near Hastings, the practical question isn't just "is the plume nearby" in the abstract -- it's whether the parcel falls inside the ICA's mapped boundary, whether an existing well on the parcel is part of EPA's well inventory or already connected to an alternate supply, and whether any land-use restriction tied to the ICA would affect drilling a new well there. That's a subsite-specific, address-specific determination: check a specific parcel against EPA's current site profile and subsite maps, and ask Hastings Utilities directly about ICA boundaries and requirements before assuming a parcel is either inside or outside the restricted area.

What to actually check before relying on a parcel's well

1. Confirm which NRD (Upper Big Blue or Little Blue) governs the specific parcel -- not just "Adams County" generally -- with either district's office.
2. If the parcel is in Upper Big Blue's territory, ask which of the 12 Management Zones it falls in and whether that zone currently carries a Phase III (or higher) irrigation-water testing obligation.
3. If the parcel is in Little Blue's territory, ask whether it sits in an area already showing elevated nitrate trends or any designated sub-area with added controls.
4. For any parcel in or near Hastings, check its location against EPA's current Hastings Ground Water Contamination site profile and subsite maps, and contact Hastings Utilities about the institutional control area's boundary and any effect on a new or existing well.
5. For a new well pumping over 50 gpm, get the NRD drilling permit before construction begins -- don't assume post-completion state registration alone is sufficient.