Septic System Research & Data
SepticFormula publishes original data reports on septic system ownership, failure costs, and product comparisons — compiled from EPA records, US Census data, and contractor cost databases. All reports are free and publicly available.
Septic System Ownership by State: 2026 Data Report
State-by-state breakdown of septic system ownership rates across all 50 US states. Data sourced from US Census Bureau, EPA wastewater reports, and state environmental agencies.
21M+
US households on septic
1 in 5
Share of all US homes
Vermont 55%
Highest ownership state
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True Cost of Septic Failure: 2026 Data Report
A comprehensive analysis of septic system repair and replacement costs across the US. Includes contractor cost data from Angi, HomeAdvisor, and EPA repair funding records.
$1,826–$3,500
Average repair cost
$5,000–$20,000
Drain field replacement
10–20%
Annual failure rate
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Septic Tank Additive Comparison Database: 2026
Side-by-side comparison of every major septic tank additive on the market. Includes CFU counts, bacterial strains, format, price, guarantee, and EPA classification for each product.
8+
Products compared
10
Data points per product
Category 3
EPA stance
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About Our Research
All SepticFormula research reports are compiled from publicly available government data, peer-reviewed studies, and verified contractor cost databases. We do not manufacture data. Every statistic is sourced and linked directly to its origin.
Primary sources include the US EPA Septic Systems program, the US Census Bureau Housing Survey, and contractor cost aggregators including Angi and HomeAdvisor. Research is reviewed and updated annually.
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