Explore the latest updates in North Carolina's onsite wastewater system regulations with our dedicated section on the 18E rules, set to take effect on January 1, 2024. Our page is specifically designed to help industry professionals navigate these important changes with ease. You'll find a detailed, searchable database of the new rules, complemented by a practical cross-reference guide for quick and efficient information access. For added convenience, a complete PDF version of the 18E rules is also available for download. Stay informed and compliant with our tailored resources crafted to simplify your transition to the new regulatory environment.

18E Rules

Search the 18E Rules:

Cross Reference Guide

IdentifierDescriptionReference Code
.0101Scope.1934
.0102Applicability.1961
.0103Incorporation by Referencenew
.0104Abbreviationsnew
.0105Definitions.1935
.0200Permits.1937
.0201Generalnew
.0202Application.1937(a), (b), (c), (d), and (e)
.0203Improvement Permit.1937(f) and (m)
.0204Construction Authorization.1937(g) and (h)
.0205Operation Permit.1937(i) and (j)
.0206Existing System Approvals for Reconnections and Property Additions.1937(k) and new
.0207Engineer Option Permit.1971
.0300Responsibilities.1938
.0301Owners.1938(b), (h), and (j)
.0302Local Health Department and State.1938(a), (e), (f), and (g), .1964
.0303Licensed or Certified Professionals.1938(c) and (d)
.0400Design Daily Flow and Effluent Characteristics.1949
.0401Design Daily Flow.1949(a) and (b)
.0402Effluent Characteristicsnew
.0403Adjustments to Design Daily Flow.1949(c)
.0501Site Evaluation.1939
.0502Topography and Landscape Position.1940, .1956(5)
.0503Soil Morphology.1941
.0504Soil Wetness Conditions.1942
.0505Soil Depth to Rock, Saprolite, or Parent Material.1943
.0506Saprolite.1956(6)
.0507Restrictive Horizons.1944
.0508Available Space.1945
.0509Site Suitability and Classification.1947, .1948
.0510Special Site Evaluations.1970(p)
.0600Location of Wastewater Systems.1950
.0601Location of Wastewater Systems.1950
.0602Applicability of Setbacks.1951
.0701Collection Sewers.1955(o)
.0702Raw Sewage Lift Stations.1952(e)
.0703Pipe Materials.1955(e) and (f)
.0801Septic Tank Capacity Requirements.1952(b)(1)
.0802Pump Tank Capacity Requirements.1952(c)
.0803Grease Tank Capacity Requirements.1955(k)
.0804Siphon Tank Capacity Requirements.1952(d)
.0805Tank Structural Integrity and Leak Testing Requirementsnew
.0806Tank Installation Requirements.1955(a)
.0902Conventional Wastewater Systems.1955(a), (b),.1956(1)
.0903Bed Systems.1955 (d)
.0904Large Diameter Pipe Systems.1956(3)(a)(i)
.0905Prefabricated Permeable Block Panel Systems.1956(3)(a)(ii)
.0906Sand Lined Trench Systems.1956(7)
.0907Low Pressure Pipe Systems.1957(a)
.0908Drip Dispersal Systemsnew
.0909Fill Systems.1957(b)
.0910Artificial Drainage Systems.1956(2) and (4)
.0911Privies.1958(a), .1959, .1960
.1001Alternative Toilets.1958(c)
.1002Wastewater Recycle/Reuse.1958(d)
.1101General System Dosing Requirements.1952(a)
.1102Pump Dosing.1952(b)(2-5)(8-9)
.1103Control Panels.1952(b)(6-7)
.1104Siphon Dosing.1952(d)
.1105Timed Dosingnew
.1106Pressure Dosed Gravity Distribution Devicesnew
.1200Advanced Pretreatment Systems Standards, Siting, and Sizing Criteria.1970
.1201Advanced Pretreatment System Standards.1970(a)
.1204Advanced Pretreatment Drip Dispersal Systemsnew
.1205Advanced Pretreatment Sand Lined Trench Systems.1956(7)
.1206Advanced Pretreatment Bed Systems.1970(i) and (j)
.1207Site and System Compliance Criteria for Advanced Pretreatment Systems.1970(n0
.1300Operation and Maintenance.1961 and .1970(m), (n), and (o)
.1301Operation and Maintenance of Wastewater Systems.1961(b), (f), (h), and (i)
.1302Operation and Maintenance of Advanced Pretreatment Systems.1970(m), (n), and (o)
.1303Owner Responsibilities for Wastewater System Operation and Maintenance.1961(a) and (e)
.1304Management Entity Responsibilities for Wastewater System Operation and Maintenance.1961(c), (f), (g), and (k), .1970(n)
.1305Local Health Department Responsibilities for Wastewater System Operation and Maintenance.1961(c), (d), and (j), .1970(n)
.1306System Malfunction and Repair.1958(b), .1961(l) and (m)
.1307Wastewater System Abandonmentnew
.1401Plans for Prefabricated Tanks.1953
.1402Tank Design and Construction.1954
.1403Tank Material Requirements.1954 and new
.1404Plans for Risers, Effluent Filters, and Pipe Penetrationsnew
.1405Risers, Effluent Filters, and Pipe Penetration Approval Renewalnew
.1406Modification, Suspension, and Revocation of Approvals.1954
.1500Approval and Use of Residential Wastewater Treatment Systems.1957(c)
.1502Application.1957(c)(1)
.1503Design and Construction Standards.1957(c)(3)
.1504Effluent Sampling Requirements for Residential Wastewater Treatment Systems.1970(n)
.1505Residential Wastewater Treatment System Approval Renewalnew
.1600Approval and Use of Pre-Engineered Package Drip Dispersal Systemsnew
.1601Generalnew/innovative drip approvals
.1602Design and Construction Standardsnew/innovative drip approvals
.1603Drip Dispersal System Testingnew/innovative drip approvals
.1700Approval and Permitting of Wastewater Systems, Technologies, Components, or Devices.1969
.1701General.1969(a)
.1702Application.1969(b)
.1703Department and Commission Application Review.1969(c)
.1704Approval Criteria for Provisional Systems.1969(e)
.1705Approval Criteria for Innovative Systems.1969(g)
.1706Approval Criteria for Accepted Systems.1969(h)
.1707Design and Installation Criteria for Provisional, Innovative, and Accepted Approvals.1970(l)
.1708Modification, Suspension, and Revocation of Approvals.1969(j), (k), and (l)
.1709Effluent Sampling Requirements for Advanced Pretreatment Systems.1970(n)
.1710System Compliance Criteria for Advanced Pretreatment Systems.1970(o)
.1711Provisional and Innovative Approval Renewalnew
.1712Authorized Designers, Installers, and Management Entities.1969(o), .1970(l) and new
.1713Local Health Department Responsibilities.1969(f), (i), (m), and (p)