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Septic Tanks by State Approval

Not sure which codes and regulations apply to your septic tank? Need to confirm your system is compliant for your state? We make it easy. Our guide lists state septic approval requirements, certified septic tank options, and the exact rules and regulations, organized by state, so you can choose confidently.

At Tank Superstore, every septic tank and septic holding tank we sell is IAPMO certified and carries the CSA stamp of approval. Buying a state approved septic tank from us means you are prepared before inspections even start. No surprises. Your wastewater storage meets state requirements from the start.

Explore our approved tanks, compare specs, and find the holding tank for septic applications that matches your local code. If you need help interpreting state septic tank regulations or septic tank codes by state, our team is ready to point you to the right solution.

Reminder: Confirm final requirements with your local Authority Having Jurisdiction or a licensed installer, since local enforcement can add rules. If your state is not listed, state approval is still being processed.

Want to speak with a expert about which tank is right for your project? Contact us today for industry leading guidance.

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    • State Approved Septic Tanks

    Filter the list as you type

    Michigan +
    • Approval status Approved (MI-22)
    • Capacity range approved 300 to 1500 gallons

    Certified Tanks

    Part Number Description Capacity
    AKS30222 SEPTIC, 300 MICHIGAN SINGLE STANDARD (MI-22) 300gal
    AKS40222 SEPTIC, 500 MICHIGAN SINGLE STANDARD (MI-22) 500gal
    AKS50222 SEPTIC, 750 MICHIGAN SINGLE STANDARD (MI-22) 750gal
    AKS70522 SEPTIC, 1000 MICHIGAN SINGLE STANDARD (MI-22) 1000gal
    AKS50722 SEPTIC, 1050 MICHIGAN SINGLE STANDARD (MI-22) 1050gal
    AKS90522 SEPTIC, 1300 MICHIGAN SINGLE STANDARD (MI-22) 1300gal
    AKS80522 SEPTIC, 1300 MICHIGAN DUAL STANDARD (MI-22) 1300gal
    AKS95022 SEPTIC, 1500 MICHIGAN SINGLE STANDARD (MI-22) 1500gal
    AKS95222 SEPTIC, 1500 MICHIGAN DUAL STANDARD (MI-22) 1500gal
    AKS30222-HVY SEPTIC, 300 MICHIGAN SINGLE HEAVY (MI-22) 300gal
    AKS40222-HVY SEPTIC, 500 MICHIGAN SINGLE HEAVY (MI-22) 500gal
    AKS50222-HVY SEPTIC, 750 MICHIGAN SINGLE HEAVY (MI-22) 750gal
    AKS70522-HVY SEPTIC, 1000 MICHIGAN SINGLE HEAVY (MI-22) 1000gal
    AKS50722-HVY SEPTIC, 1050 MICHIGAN SINGLE HEAVY (MI-22) 1050gal
    AKS90522-HVY SEPTIC, 1300 MICHIGAN SINGLE HEAVY (MI-22) 1300gal
    AKS80522-HVY SEPTIC, 1300 MICHIGAN DUAL HEAVY (MI-22) 1300gal
    AKS95022-HVY SEPTIC, 1500 MICHIGAN SINGLE HEAVY (MI-22) 1500gal
    AKS95222-HVY SEPTIC, 1500 MICHIGAN DUAL HEAVY (MI-22) 1500gal

    Updated July 2025

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    Minnesota +
    • Approval status Approved (MN-23)
    • Capacity range approved 1000 gallons

    Certified Tanks

    Part Number Description Capacity
    AKS70523 SEPTIC, 1000 MINNESOTA SINGLE STANDARD (MN-23) 1000gal
    AKS60423 SEPTIC, 1000 MINNESOTA DUAL STANDARD (MN-23) 1000gal
    AKS70523-HVY SEPTIC, 1000 MINNESOTA SINGLE HEAVY (MN-23) 1000gal
    AKS60423-HVY SEPTIC, 1000 MINNESOTA DUAL HEAVY (MN-23) 1000gal

    Updated July 2025

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    Mississippi +
    • Approval status Approved (MS-24)
    • Capacity range approved 300 to 1050 gallons

    Certified Tanks

    Part Number Description Capacity
    AKS30224 SEPTIC, 300 MISSISSIPPI SINGLE STANDARD (MS-24) 300gal
    AKS40224 SEPTIC, 500 MISSISSIPPI SINGLE STANDARD (MS-24) 500gal
    AKS50224 SEPTIC, 750 MISSISSIPPI SINGLE STANDARD (MS-24) 750gal
    AKS70524 SEPTIC, 1000 MISSISSIPPI SINGLE STANDARD (MS-24) 1000gal
    AKS60424 SEPTIC, 1000 MISSISSIPPI DUAL STANDARD (MS-24) 1000gal
    AKS50724 SEPTIC, 1050 MISSISSIPPI SINGLE STANDARD (MS-24) 1050gal
    AKS30224-HVY SEPTIC, 300 MISSISSIPPI SINGLE HEAVY (MS-24) 300gal
    AKS40224-HVY SEPTIC, 500 MISSISSIPPI SINGLE HEAVY (MS-24) 500gal
    AKS50224-HVY SEPTIC, 750 MISSISSIPPI SINGLE HEAVY (MS-24) 750gal
    AKS70524-HVY SEPTIC, 1000 MISSISSIPPI SINGLE HEAVY (MS-24) 1000gal
    AKS60424-HVY SEPTIC, 1000 MISSISSIPPI DUAL HEAVY (MS-24) 1000gal
    AKS50724-HVY SEPTIC, 1050 MISSISSIPPI SINGLE HEAVY (MS-24) 1050gal

    Updated July 2025

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    Missouri +
    • Approval status Approved (MO-25)
    • Capacity range approved 300 to 1500 gallons

    Certified Tanks

    Part Number Description Capacity
    AKS30225 SEPTIC, 300 MISSOURI SINGLE STANDARD (MO-25) 300gal
    AKS40225 SEPTIC, 500 MISSOURI SINGLE STANDARD (MO-25) 500gal
    AKS50225 SEPTIC, 750 MISSOURI SINGLE STANDARD (MO-25) 750gal
    AKS70525 SEPTIC, 1000 MISSOURI SINGLE STANDARD (MO-25) 1000gal
    AKS60425 SEPTIC, 1000 MISSOURI DUAL STANDARD (MO-25) 1000gal
    AKS50725 SEPTIC, 1050 MISSOURI SINGLE STANDARD (MO-25) 1050gal
    AKS50825 SEPTIC, 1050 MISSOURI DUAL STANDARD (MO-25) 1050gal
    AKS90525 SEPTIC, 1300 MISSOURI SINGLE STANDARD (MO-25) 1300gal
    AKS80525 SEPTIC, 1300 MISSOURI DUAL STANDARD (MO-25) 1300gal
    AKS95025 SEPTIC, 1500 MISSOURI SINGLE STANDARD (MO-25) 1500gal
    AKS95225 SEPTIC, 1500 MISSOURI DUAL STANDARD (MO-25) 1500gal
    AKS30225-HVY SEPTIC, 300 MISSOURI SINGLE HEAVY (MO-25) 300gal
    AKS40225-HVY SEPTIC, 500 MISSOURI SINGLE HEAVY (MO-25) 500gal
    AKS50225-HVY SEPTIC, 750 MISSOURI SINGLE HEAVY (MO-25) 750gal
    AKS70525-HVY SEPTIC, 1000 MISSOURI SINGLE HEAVY (MO-25) 1000gal
    AKS60425-HVY SEPTIC, 1000 MISSOURI DUAL HEAVY (MO-25) 1000gal
    AKS50725-HVY SEPTIC, 1050 MISSOURI SINGLE HEAVY (MO-25) 1050gal
    AKS50825-HVY SEPTIC, 1050 MISSOURI DUAL HEAVY (MO-25) 1050gal
    AKS90525-HVY SEPTIC, 1300 MISSOURI SINGLE HEAVY (MO-25) 1300gal
    AKS80525-HVY SEPTIC, 1300 MISSOURI DUAL HEAVY (MO-25) 1300gal
    AKS95025-HVY SEPTIC, 1500 MISSOURI SINGLE HEAVY (MO-25) 1500gal
    AKS95225-HVY SEPTIC, 1500 MISSOURI DUAL HEAVY (MO-25) 1500gal

    Updated July 2025

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    Nebraska +
    • Approval status Approved (NE-27)
    • Capacity range approved 300 to 1000 gallons

    Certified Tanks

    Part Number Description Capacity
    AKS30227 SEPTIC, 300 NEBRASKA SINGLE STANDARD (NE-27) 300gal
    AKS40227 SEPTIC, 500 NEBRASKA SINGLE STANDARD (NE-27) 500gal
    AKS50227 SEPTIC, 750 NEBRASKA SINGLE STANDARD (NE-27) 750gal
    AKS70527 SEPTIC, 1000 NEBRASKA SINGLE STANDARD (NE-27) 1000gal
    AKS60427 SEPTIC, 1000 NEBRASKA DUAL STANDARD (NE-27) 1000gal
    AKS30227-HVY SEPTIC, 300 NEBRASKA SINGLE HEAVY (NE-27) 300gal
    AKS40227-HVY SEPTIC, 500 NEBRASKA SINGLE HEAVY (NE-27) 500gal
    AKS50227-HVY SEPTIC, 750 NEBRASKA SINGLE HEAVY (NE-27) 750gal
    AKS70527-HVY SEPTIC, 1000 NEBRASKA SINGLE HEAVY (NE-27) 1000gal
    AKS60427-HVY SEPTIC, 1000 NEBRASKA DUAL HEAVY (NE-27) 1000gal

    Updated July 2025

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    New Hampshire +
    • Approval status Approved (NH-29)
    • Capacity range approved 300 to 1000 gallons

    Certified Tanks

    Part Number Description Capacity
    AKS30229 SEPTIC, 300 NEW HAMPSHIRE SINGLE STANDARD (NH-29) 300gal
    AKS40229 SEPTIC, 500 NEW HAMPSHIRE SINGLE STANDARD (NH-29) 500gal
    AKS50229 SEPTIC, 750 NEW HAMPSHIRE SINGLE STANDARD (NH-29) 750gal
    AKS70529 SEPTIC, 1000 NEW HAMPSHIRE SINGLE STANDARD (NH-29) 1000gal
    AKS60429 SEPTIC, 1000 NEW HAMPSHIRE DUAL STANDARD (NH-29) 1000gal
    AKS30229-HVY SEPTIC, 300 NEW HAMPSHIRE SINGLE HEAVY (NH-29) 300gal
    AKS40229-HVY SEPTIC, 500 NEW HAMPSHIRE SINGLE HEAVY (NH-29) 500gal
    AKS50229-HVY SEPTIC, 750 NEW HAMPSHIRE SINGLE HEAVY (NH-29) 750gal
    AKS70529-HVY SEPTIC, 1000 NEW HAMPSHIRE SINGLE HEAVY (NH-29) 1000gal
    AKS60429-HVY SEPTIC, 100 NEW HAMPSHIRE DUAL HEAVY (NH-29) 100gal

    Updated July 2025

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    New Mexico +
    • Approval status undefined
    • Capacity range approved undefined

    Certified Tanks

    Part Number Description Capacity
    AKS60431 SEPTIC, 1000 NEW MEXICO DUAL STANDARD (NM-31) 1000gal
    AKS60431-HVY SEPTIC, 1000 NEW MEXICO DUAL HEAVY (NM-31) 1000gal

    Updated undefined

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    New York +
    • Approval status Approved (NY-32)
    • Capacity range approved 300 to 1500 gallons

    Certified Tanks

    Part Number Description Capacity
    AKS30232 SEPTIC, 300 NEW YORK SINGLE STANDARD (NY-32) 300gal
    AKS40232 SEPTIC, 500 NEW YORK SINGLE STANDARD (NY-32) 500gal
    AKS50232 SEPTIC, 750 NEW YORK SINGLE STANDARD (NY-32) 750gal
    AKS70532 SEPTIC, 1000 NEW YORK SINGLE STANDARD (NY-32) 1000gal
    AKS60432 SEPTIC, 1000 NEW YORK DUAL STANDARD (NY-32) 1000gal
    AKS50832 SEPTIC, 1050 NEW YORK SINGLE STANDARD (NY-32) 1050gal
    AKS90532 SEPTIC, 1300 NEW YORK SINGLE STANDARD (NY-32) 1300gal
    AKS95032 SEPTIC, 1500 NEW YORK SINGLE STANDARD (NY-32) 1500gal
    AKS30232-HVY SEPTIC, 300 NEW YORK SINGLE HEAVY (NY-32) 300gal
    AKS40232-HVY SEPTIC, 500 NEW YORK SINGLE HEAVY (NY-32) 500gal
    AKS50232-HVY SEPTIC, 750 NEW YORK SINGLE HEAVY (NY-32) 750gal
    AKS70532-HVY SEPTIC, 1000 NEW YORK SINGLE HEAVY (NY-32) 1000gal
    AKS60432-HVY SEPTIC, 1000 NEW YORK DUAL HEAVY (NY-32) 1000gal
    AKS50832-HVY SEPTIC, 1050 NEW YORK SINGLE HEAVY (NY-32) 1050gal
    AKS90532-HVY SEPTIC, 1300 NEW YORK SINGLE HEAVY (NY-32) 1300gal
    AKS95032-HVY SEPTIC, 1500 NEW YORK SINGLE HEAVY (NY-32) 1500gal

    Updated July 2025

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    North Carolina +
    • Approval status Approved (NC-33)
    • Capacity range approved 1050 gallons

    Certified Tanks

    Part Number Description Capacity
    AKS50833 SEPTIC, 1050 NORTH CAROLINA DUAL STANDARD (NC-33) 1050gal
    AKS50833-HVY SEPTIC, 1050 NORTH CAROLINA DUAL HEAVY (NC-33) 1050gal

    Updated July 2025

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    Ohio +
    • Approval status Approved (OH-35)
    • Capacity range approved 300 to 1500 gallons

    Certified Tanks

    Part Number Description Capacity
    AKS30235 SEPTIC, 300 OHIO SINGLE STANDARD (OH-35) 300gal
    AKS40235 SEPTIC, 500 OHIO SINGLE STANDARD (OH-35) 500gal
    AKS50235 SEPTIC, 750 OHIO SINGLE STANDARD (OH-35) 750gal
    AKS70535 SEPTIC, 1000 OHIO SINGLE STANDARD (OH-35) 1000gal
    AKS60435 SEPTIC, 1000 OHIO DUAL STANDARD (OH-35) 1000gal
    AKS50735 SEPTIC, 1050 OHIO SINGLE STANDARD (OH-35) 1050gal
    AKS50835 SEPTIC, 1050 OHIO DUAL STANDARD (OH-35) 1050gal
    AKS90535 SEPTIC, 1300 OHIO SINGLE STANDARD (OH-35) 1300gal
    AKS80535 SEPTIC, 1300 OHIO DUAL STANDARD (OH-35) 1300gal
    AKS95035 SEPTIC, 1500 OHIO SINGLE STANDARD (OH-35) 1500gal
    AKS95235 SEPTIC, 1500 OHIO DUAL STANDARD (OH-35) 1500gal
    AKS30235-HVY SEPTIC, 300 OHIO SINGLE HEAVY (OH-35) 300gal
    AKS40235-HVY SEPTIC, 500 OHIO SINGLE HEAVY (OH-35) 500gal
    AKS50235-HVY SEPTIC, 750 OHIO SINGLE HEAVY (OH-35) 750gal
    AKS70535-HVY SEPTIC, 1000 OHIO SINGLE HEAVY (OH-35) 1000gal
    AKS60435-HVY SEPTIC, 1000 OHIO DUAL HEAVY (OH-35) 1000gal
    AKS50735-HVY SEPTIC, 1050 OHIO SINGLE HEAVY (OH-35) 1050gal
    AKS50835-HVY SEPTIC, 1050 OHIO DUAL HEAVY (OH-35) 1050gal
    AKS90535-HVY SEPTIC, 1300 OHIO SINGLE HEAVY (OH-35) 1300gal
    AKS80535-HVY SEPTIC, 1300 OHIO DUAL HEAVY (OH-35) 1300gal
    AKS95035-HVY SEPTIC, 1500 OHIO SINGLE HEAVY (OH-35) 1500gal
    AKS95235-HVY SEPTIC, 1500 OHIO DUAL HEAVY (OH-35) 1500gal

    Updated July 2025

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    Oklahoma +
    • Approval status Approved (OK-36)
    • Capacity range approved 300 to 1000 gallons

    Certified Tanks

    Part Number Description Capacity
    AKS30236 SEPTIC, 300 OKLAHOMA SINGLE STANDARD (OK-36) 300gal
    AKS40236 SEPTIC, 500 OKLAHOMA SINGLE STANDARD (OK-36) 500gal
    AKS50236 SEPTIC, 750 OKLAHOMA SINGLE STANDARD (OK-36) 750gal
    AKS70536 SEPTIC, 1000 OKLAHOMA SINGLE STANDARD (OK-36) 1000gal
    AKS60436 SEPTIC, 1000 OKLAHOMA DUAL STANDARD (OK-36) 1000gal
    AKS30236-HVY SEPTIC, 300 OKLAHOMA SINGLE HEAVY (OK-36) 300gal
    AKS40236HVY SEPTIC, 500 OKLAHOMA SINGLE HEAVY (OK-36) 500gal
    AKS50236-HVY SEPTIC, 750 OKLAHOMA SINGLE HEAVY (OK-36) 750gal
    AKS70536-HVY SEPTIC, 1000 OKLAHOMA SINGLE HEAVY (OK-36) 1000gal
    AKS60436-HVY SEPTIC, 1000 OKLAHOMA DUAL HEAVY (OK-36) 1000gal

    Updated July 2025

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    Pennsylvania +
    • Approval status Approved (PA-38)
    • Capacity range approved 300 to 1000 gallons

    Certified Tanks

    Part Number Description Capacity
    AKS30238 SEPTIC, 300 PENNSYLVANIA SINGLE STANDARD (PA-38) 300gal
    AKS40238 SEPTIC, 500 PENNSYLVANIA SINGLE STANDARD (PA-38) 500gal
    AKS50238 SEPTIC, 750 PENNSYLVANIA SINGLE STANDARD (PA-38) 750gal
    AKS70538 SEPTIC, 1000 PENNSYLVANIA SINGLE STANDARD (PA-38) 1000gal
    AKS60438 SEPTIC, 1000 PENNSYLVANIA DUAL STANDARD (PA-38) 1000gal
    AKS30238-HVY SEPTIC, 300 PENNSYLVANIA SINGLE HEAVY (PA-38) 300gal
    AKS40238-HVY SEPTIC, 500 PENNSYLVANIA SINGLE HEAVY (PA-38) 500gal
    AKS50238-HVY SEPTIC, 750 PENNSYLVANIA SINGLE HEAVY (PA-38) 750gal
    AKS70538-HVY SEPTIC, 1000 PENNSYLVANIA SINGLE HEAVY (PA-38) 1000gal
    AKS60438-HVY SEPTIC, 1000 PENNSYLVANIA DUAL HEAVY (PA-38) 1000gal

    Updated July 2025

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    South Carolina +
    • Approval status Approved (SC-40)
    • Capacity range approved 500 to 750 gallons

    Certified Tanks

    Part Number Description Capacity
    AKS40240 SEPTIC, 500 SOUTH CAROLINA SINGLE STANDARD (SC-40) 500gal
    AKS50240 SEPTIC, 750 SOUTH CAROLINA SINGLE STANDARD (SC-40) 750gal
    AKS40240-HVY SEPTIC, 500 SOUTH CAROLINA SINGLE HEAVY (SC-40) 500gal
    AKS50240-HVY SEPTIC, 750 SOUTH CAROLINA SINGLE HEAVY (SC-40) 750gal

    Updated July 2025

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    Tennessee +
    • Approval status Approved (TN-42)
    • Capacity range approved 300 to 1500 gallons

    Certified Tanks

    Part Number Description Capacity
    AKS40242 SEPTIC, 500 TENNESSEE SINGLE STANDARD (TN-42) 500gal
    AKS50242 SEPTIC, 750 TENNESSEE SINGLE STANDARD (TN-42) 750gal
    AKS70542 SEPTIC, 1000 TENNESSEE SINGLE STANDARD (TN-42) 1000gal
    AKS60442 SEPTIC, 1000 TENNESSEE DUAL STANDARD (TN-42) 1000gal
    AKS50842 SEPTIC, 1050 TENNESSEE DUAL STANDARD (TN-42) 1050gal
    AKS80542 SEPTIC, 1300 TENNESSEE SINGLE STANDARD (TN-42) 1300gal
    AKS90542 SEPTIC, 1300 TENNESSEE SINGLE STANDARD (TN-42) 1300gal
    AKS95042 SEPTIC, 1500 TENNESSEE SINGLE STANDARD (TN-42) 1500gal
    AKS95242 SEPTIC, 1500 TENNESSEE DUAL STANDARD (TN-42) 1500gal
    AKS30242-HVY SEPTIC, 300 TENNESSEE SINGLE HEAVY (TN-42) 300gal
    AKS40242-HVY SEPTIC, 500 TENNESSEE SINGLE HEAVY (TN-42) 500gal
    AKS50242-HVY SEPTIC, 750 TENNESSEE SINGLE HEAVY (TN-42) 750gal
    AKS70542-HVY SEPTIC, 1000 TENNESSEE SINGLE HEAVY (TN-42) 1000gal
    AKS60442-HVY SEPTIC, 1000 TENNESSEE DUAL HEAVY (TN-42) 1000gal
    AKS50842-HVY SEPTIC, 1050 TENNESSEE DUAL HEAVY (TN-42) 1050gal
    AKS80542-HVY SEPTIC, 1300 TENNESSEE SINGLE HEAVY (TN-42) 1300gal
    AKS90542-HVY SEPTIC, 1300 TENNESSEE SINGLE HEAVY (TN-42) 1300gal
    AKS95042-HVY SEPTIC, 1500 TENNESSEE SINGLE HEAVY (TN-42) 1500gal

    Updated July 2025

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    Reminder: Confirm final requirements with your local Authority Having Jurisdiction or a licensed installer prior to purchase. Local enforcement can add rules beyond state approvals.
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