Septic inspection, pumping, repair or replacement in New Castle County, DE: describe your project once and contractors who work in New Castle County get back to you. New Castle County has about 588,093 residents (2024 estimate) and 13 incorporated cities and towns; many homes outside them rely on septic systems.
Permits for new and repaired systems are generally issued by the county or state health department serving New Castle County.
Services available in New Castle County
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Septic inspection
Inspection of the tank and drain field, often requested when a home is sold or by the local health department.
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Septic tank pumping
Pumping the solids out of the tank. EPA notes household tanks are typically pumped every three to five years.
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New septic system design and installation
Soil and percolation testing, system design, permit and installation for a new home or a replacement system.
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Septic repair
Diagnosis and repair of backups, odors, a failing drain field or damaged components.
Frequently asked questions in New Castle County
Who issues septic permits in New Castle County?
In most of Delaware, onsite wastewater permits are issued by the county or state health department. Your contractor files the application or tells you how.
Septic Services in Delaware: all counties
Source: U.S. Census Bureau, Population Estimates Program (Vintage 2024) and Gazetteer Files (public domain), imported on 10/31/2026. Figures describe the incorporated place or county as published; they are shown for information only.