⟁ Illinois Well Data field records · 2026 survey

Illinois Well Data › Lasalle County › Seneca (61360)

Seneca, IL (61360): well depth, water level & drilling cost

✓ 521 ISGS records · Lasalle County

253 ftmedian well depth
158 ft–350 fttypical depth range
—median static water level
12 gpmmedian yield (205 tests)

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How deep are wells in and around Seneca (61360), Illinois?

The median drilled well depth in and around Seneca (61360) is 253 ft, based on 513 wells with recorded depths in the state ISGS database. Half fall between 158 ft and 350 ft; 90% are shallower than 427 ft.

How much does it cost to drill a well in and around Seneca (61360)?

Applying published per-foot rates to the local median depth of 253 ft: drilling and casing alone typically runs $6,325–$16,445; a complete system including pump, pressure tank, and hookup typically runs $15,180–$25,300. Actual quotes depend on site access, geology, and casing requirements.

What is the static water level in and around Seneca (61360)?

Few static water level measurements are recorded for this area.

Drilled depth distribution

0–50 ft 22 50–100 ft 25 100–150 ft 61 150–200 ft 80 200–300 ft 122 300–400 ft 118 400–600 ft 66 600+ ft 19
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Part of Lasalle County well records.

Method: medians computed from ISGS records (ISGS water wells; engineering, mineral and stratigraphic test borings, mine shafts, outcrops and monitoring wells are excluded, as are wells the survey records as plugged; depths 0-5,000 ft), grouped by ZIP from the recorded address. Cost estimate applies published per-foot ranges to the local median depth — full methodology & sources.