What Thornton Well Records Tell You Before You Buy

How deep are wells around Thornton?

How much water do wells make near Thornton?

Thornton well depths range from shallow to very deep

The typical recorded depth near Thornton is shallow: the median is 42 feet, and 64% of wells are under 100 feet. That does not mean every lot can be served by a shallow well. The middle half of reported depths extends from 25 to 350 feet, 19% are between 300 and 600 feet, and 10% exceed 600 feet. The deepest record is 1,581 feet.

For a drilling bid, the median is only a starting reference. A site with nearby shallow wells may still encounter different sediments, bedrock or water-bearing zones. Review neighboring construction reports near Northglenn, Henderson and Welby, but do not treat one nearby depth as a guarantee. The aquifer label and the actual well logs are more useful than distance alone.

What a Thornton well may produce

Among the wells that report a pump yield, the median is 12.0 gallons per minute. The middle half falls between 10.0 and 15.0 gallons per minute. That is a solid planning range for many household uses, but yield reports cover only 513 wells, so the result is not a guarantee for every parcel.

Low production is uncommon in these records: 0% report under 1 gallon per minute, 3% report 1 to 5 gallons per minute, 59% report 5 to 15 gallons per minute, and 39% report more than 15 gallons per minute. Ask for the well completion report and pump test. Storage capacity, pressure equipment and the permitted use still matter, especially when irrigation or livestock is part of the plan.

Thornton water levels are relatively shallow in the records

The median static water level is 14 feet below ground surface, with the middle half between 9 and 35 feet. These measurements come from 209 wells, far fewer than the total permit records, and static level is not the same as the water available while pumping. Seasonal conditions and nearby pumping can change the reading.

The decade pattern does not show a simple ongoing drop. The median was 24 feet below surface in the 2000s, 11 feet in the 2010s and 13 feet in the 2020s. The more recent figures are shallower than the 2000s, with the 2020s slightly deeper than the 2010s. Treat that as a record-based snapshot, not a guarantee of future water levels at a particular home.

Permit history points to long-term drilling activity

Colorado DWR records contain 4,832 permitted wells within the mapped area, including 2,597 recorded as constructed. Permit activity increased from 178 permits in the 1950s to 856 in the 2000s, then totaled 664 in the 2010s and 483 in the 2020s. The newest permit year is 2025.

The use mix is not all residential: 34% are domestic or household, 9% irrigation, 4% stock and 39% monitoring. The most active names in the records are Authorized (Pe, Pg), John'S Drilling Inc. (John, Lloyd), and Roger Schocke Well Drlg. Inc. (Schocke, Roger). Confirm the current license, scope and references before selecting a driller.

Thornton drilling cost depends on the finished system

The cost model for Thornton uses Denver Basin sedimentary bedrock and a drilling rate of $50 to $70 per foot. At the recorded median depth of 42 feet, the drilled hole is estimated at about $2,100 to $2,900. That is only the hole, not a functioning water system.

A finished well with pump, pressure tank, trenching and electrical is modeled at about $8,100 to $14,900 at that depth. Deeper drilling, difficult access, casing and grout requirements, water treatment, rock conditions or longer utility runs can change the bid. Get a written proposal that separates drilling from casing, grout, pump equipment, trenching, electrical and testing. A shallow median should not be used as a fixed price for a particular lot.

Check water quality, dry-hole risk and building constraints

Environmental review deserves attention around Thornton. The mapped area within about 10 miles includes 714 PFAS sampling or contamination sites, 44 EPA Superfund or cleanup sites and 24 historic mine features. Those mapped sites do not prove a problem at a specific address, but they are a reason to test the well and review nearby land uses before closing.

Low yield and dry holes remain site-specific risks despite the reported production numbers. Check well construction, casing, grout, pump test results and maintenance history. For a new build, confirm the permitted use, septic setbacks, soil conditions, access for a rig and space for replacement equipment. A well permit does not by itself guarantee safe water, adequate supply or approval for every intended use.

Use nearby wells to price and plan a Thornton lot

Before buying, pull the DWR records for the parcel and the closest completed wells. Compare depth, aquifer description, construction, static water level and reported yield rather than relying on the neighborhood average. Properties near Federal Heights, Todd Creek and Derby may provide useful context, but local geology can change over short distances.

For a new well, confirm the permit pathway before excavation. Household-use wells may be exempt wells, while a proposed irrigation or other use can involve different limits and requirements. In an over-appropriated basin, an augmentation plan may be needed. Have a driller and septic professional review access, setbacks, pump sizing and water storage before you finalize a purchase or house layout.

Well permits by decade near Thornton

What a new well costs in Thornton, CO

How this is built: the median permitted depth here times the per-foot range for this ground, plus the normal system costs. A lot at the 75th-percentile depth (350 ft) would run roughly $23,500–$36,500. See the full Colorado well cost guide.

Environmental sites mapped within about 10 miles

Counts come from EPA, USGS and state datasets layered on the Colorado Well Finder map. A count is not a verdict on any one well; it tells you what to test for.

Buying land near Thornton? Know what it costs to build before you buy the dirt.

A listing photo can't tell you whether a lot is a dream or a money pit. Two parcels near Thornton can carry the same asking price while one needs an $80,000 driveway and a $45,000 engineered septic the other doesn't. The well numbers on this page are the start of that answer. A Tri-Lakes Site Feasibility Report is the rest of it: a licensed general contractor, excavator and septic installer reads the parcel the way we would if we were about to build on it, and puts the real cost in writing before your money is committed.

Spend a little to know. Or gamble a lot to guess. Realtors sell the view and inspectors look at houses that already exist. We're the people who'd build it, so we catch what quietly turns a "great deal" into a budget disaster: bad access, buried rock, steep grade, soil that won't pass for a normal septic, water that's a fortune to reach. And if the lot is good, you've already got a builder ready to do the work, driveway to drywall.

• Instant Online Report, $99 — type the address and get a buildability read on the spot: parcel, terrain and slope, soil and septic outlook. Cheap enough to run on every lot you're shopping.
• Desktop Report, $500 — a contractor's from-the-desk feasibility read: Regulation 43 and county code, GIS parcel data, terrain, flood and drainage, soil and septic viability, setbacks and buildable envelope, nearby well depths from our 591,000-well database, the likely driveway route, and a preliminary site-development cost breakdown.
• On-Site Report, $2,000 — everything above, then boots and a drone on the actual ground: house pad and septic zone located, access and winter conditions checked, rock and soil observed in person, a 15 to 20 page written opinion you can hand a lender or seller. Credited toward your project if you build with us.

Under contract, comparing parcels, or a realtor with a rural listing whose buyers keep asking "what will it cost to build here?" This is the due-diligence step almost everyone skips, and the one that saves the most.

Common questions about wells in Thornton

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All wells in Adams County — county-wide depth, yield and cost figures.

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