What the one-year rule says
When a Rhode Island home served by a cesspool is sold or transferred, the cesspool must be removed and replaced with a septic system (an OWTS) or connected to public sewer within twelve months of the sale date. That is the core of R.I. Gen. Laws § 23-19.15-12, and it applies across the whole state.
RIDEM puts it more simply: "the cesspool must be removed from service within one year of the closing date" (RIDEM cesspool page). The requirement covers closings on or after January 1, 2016, according to the RIDEM Cesspool Act FAQ. Section 12 has three parts, and each one matters to a different person in the deal.
Subsection (a): replace or connect within 12 months
A cesspool serving a building that is sold or transferred "shall be removed and replaced with an OWTS or ... connected to a public sewer system within twelve (12) months of the date of sale or transfer." The clock starts at closing, not at listing or at the purchase and sale agreement.
Subsection (b): find out if there is a cesspool
If nobody knows how the building disposes of wastewater, "an inspection shall be conducted to determine if a cesspool is present." A system inspector does this before the sale or transfer. Older homes with no permit on file are the usual candidates.
Subsection (c): the buyer's inspection period
Purchase contracts must give buyers "a ten-day (10) period, unless the parties mutually agree upon a different period" to inspect the onsite system. The real estate disclosure law repeats this right, as covered further down this page.
What triggers a required cesspool upgrade
Four events force action on a Rhode Island cesspool: a sale or transfer, a failure, a location inside one of the 200-foot protection zones, and a sewer stub at the property line. There is no statewide deadline for every other cesspool, although RIDEM says all of them pre-date 1968 and must eventually go (RIDEM OWTS program).
The chapter history on the legislature's Cesspool Act index shows no amendments after 2015, so these four triggers are the current state rules. Your town may add a fifth trigger of its own, which we cover in the local rules section below.
| Trigger | What the law requires | Statute |
|---|---|---|
| Sale or transfer | Replace with an OWTS or connect to sewer within 12 months of closing | § 23-19.15-12 |
| Failed cesspool | Properly abandon within one year of discovery, sooner if a public health hazard | § 23-19.15-6 |
| Within 200 ft of tidal shoreline, a public well or a surface drinking water supply | Properly abandon by January 1, 2014 (deadline has passed) | §§ 23-19.15-5, -6 |
| Sewer stub available at the property | Connect to sewer by January 1, 2014 (deadline has passed) | § 23-19.15-6 |
Why the state targets cesspools
The legislature found "more than twenty-five thousand (25,000) cesspools within the state as of 2013" (§ 23-19.15-2). A cesspool does not treat sewage; it collects solids and lets liquid seep into the soil. In South County that matters because groundwater feeds both private wells and the salt ponds.
A 2007 University of Rhode Island study prepared for CRMC estimated that septic systems supplied about 85% of the nitrogen reaching groundwater around Point Judith Pond and about 80% around Potter Pond, and almost 75% of the nitrogen entering Green Hill Pond (CRMC nitrogen white paper). Those numbers explain why the coastal rules are stricter than the statewide minimum.
Who pays: the buyer or the seller
The Cesspool Act does not say whether the buyer or the seller pays for the upgrade. RIDEM's FAQ says the law "does not specify which party, buyer or seller, is responsible" and that the cost is "subject to negotiation" (RIDEM FAQ). What the law does fix is who gets cited if the work is late.
That person is the new owner. If the cesspool is still in service a year after closing, enforcement lands on the buyer, whatever the purchase contract said. In practice the parties settle it in the deal: the seller replaces the system before closing, the price comes down, or the seller gives a credit. Each approach shifts risk differently, so read the contract language closely.
This is general information, not legal or tax advice.
- Sellers: see our guide to selling a house with a cesspool in RI.
- Buyers: see our guide to buying a house with a cesspool in RI.
Foreclosures and bank-owned sales
Foreclosures are not exempt from the Rhode Island cesspool rule. RIDEM's FAQ says so directly, which means a bank sale or a foreclosure auction starts the same 12-month clock as an ordinary sale (RIDEM FAQ). Buyers of distressed properties should budget for a full replacement from day one.
Bank-owned homes are often sold as-is, with little history about the system. If the wastewater method is unknown, the inspection required by subsection (b) of the sale rule still applies, and the buyer still carries the one-year deadline after taking title.
Transfers that are exempt from the sale rule
Some transfers inside a family do not count as a "transfer" under the Cesspool Act, so they do not start the 12-month clock. The definition in § 23-19.15-4 carves out four kinds of transfers, and RIDEM's FAQ lists the same group. Every other sale or transfer, including a foreclosure, is covered.
An exempt transfer only postpones the question. When the property later sells to someone outside the exempt group, the one-year rule applies to that sale in the normal way.
| Exempt transfer | Example |
|---|---|
| Between current spouses | One spouse deeds the house to the other |
| Between parents and their children | A parent deeds the family home to a daughter |
| Between full siblings | A brother buys out his sister's share |
| Into a revocable or irrevocable trust whose beneficiaries are first-degree relatives | An owner moves the house into a trust for their children |
The 200-foot zones and sewer stubs
Cesspools close to sensitive water had earlier, fixed deadlines. Under § 23-19.15-5, cesspools within 200 feet of the inland edge of a tidal shoreline feature, a public drinking water well, or a surface drinking water impoundment had to be inspected by January 1, 2012, and abandoned by January 1, 2014.
Properties with a sewer stub had the same 2014 connection deadline under § 23-19.15-6. RIDEM says "all remaining cesspools in these areas are in violation of the Cesspool Act" (RIDEM). If a home near the shore still has a cesspool, the sale rule is not the only issue; it may already be out of compliance. Our sewer connection page covers tie-ins.
What counts as a failed cesspool
A failed cesspool must be abandoned within one year of discovery, and sooner if it is a public health hazard, whether or not the house is for sale. The definitions in § 23-19.15-4 list the signs that make a cesspool "failed," and several of them are easy for an owner to notice.
A cesspool is "any buried chamber other than an onsite wastewater treatment system" that collects solids and discharges liquid to the soil, including metal tanks, perforated concrete vaults and covered pits. The failure criteria include:
- Sewage at the ground surface
- Liquid within 6 inches of the inlet pipe's invert
- Pumping needed more than twice a year
- Contamination of a well or watercourse
- The bottom of the cesspool in contact with groundwater
Not sure what you have?
Our guide on how to tell if you have a cesspool walks through permit records and field clues, and the signs of septic failure guide covers symptoms.
The hardship waiver, and why it ends at sale
Owners facing the 200-foot zone deadlines could ask for a hardship waiver under § 23-19.15-7. It is limited to households at or below 80% of area median income whose cesspool has not failed, and it lasts at most five years. The waiver "shall expire upon transfer or sale," so it never helps at closing.
The waiver is tied to the schedule in section 6, not to the sale rule in section 12. A waiver does not pass to a buyer, and a buyer cannot use one to extend the 12-month deadline. Anyone buying a home with a waiver on file should treat the cesspool as due for replacement within a year.
Penalties and enforcement
An owner who misses a Cesspool Act deadline is in violation and can face RIDEM enforcement under § 23-19.15-9. That section points to the state's administrative penalty laws, including chapter 42-17.6, which allows expedited citations of up to $5,000. Each day of noncompliance "shall constitute a separate offense."
The expedited citation rule is in § 42-17.6-3. Because every day can count as a separate violation, a cesspool left in service long after the deadline can become far more expensive than the replacement itself. Towns with local programs can add their own fines on top, as North Kingstown does with fines of up to $500 per day for missed inspections (North Kingstown FAQ).
This is general information, not legal or tax advice.
Seller disclosure and the buyer's 10-day right
Rhode Island's seller disclosure form must carry a cesspool notice. Under § 5-20.8-2, the form states that "cesspools are a substandard and inadequate means of sewage treatment and disposal" and tells buyers about the Cesspool Act and their 10-day right to inspect the onsite system before they are bound.
The teeth are in § 5-20.8-13. If the purchase contract leaves out the inspection provision, or the seller withholds the results of a prior inspection, the buyer may "void the purchase and sale agreement" by written notice before title transfers. Sellers should disclose what they know and hand over past reports.
This is general information, not legal or tax advice.
South County towns with stricter local rules
Several South County towns go beyond the state law. Section 23-19.15-8 lets a town with an onsite wastewater ordinance phase out cesspools on its own risk-based schedule, and South Kingstown, Charlestown, North Kingstown and New Shoreham all run inspection programs that can force action before any sale.
South Kingstown requires a cesspool to be replaced "within 12 months after the sale of a property or within 5 years of the date of the first Maintenance (baseline) Inspection, whichever comes first." A failed cesspool, or one needing two or more pumpings in 12 months, must be replaced within 18 months of a notice of violation (South Kingstown cesspool rules).
Charlestown's Chapter 210 classes cesspools as substandard, requires inspections at least every three years, and gives owners 60 days after a failed inspection to apply to RIDEM for a repair permit (Charlestown code). North Kingstown requires inspections at least every three years and tells cesspool owners to plan for replacement (North Kingstown). Our South County town septic rules guide compares all nine towns.
On Block Island, New Shoreham requires inspections at least once every three years under its wastewater ordinance, with fines for owners who ignore notices (New Shoreham code). RIDEM describes the island's cesspool phase-out as ongoing. Even where a town has no local deadline, the state sale rule and failure rule still apply in full.
Salt pond and Narrow River areas: nitrogen-reducing systems
In the Salt Pond and Narrow River Critical Resource Areas, a cesspool cannot simply be swapped for a conventional septic system. RIDEM says cesspools there must be replaced with "an advanced septic system that reduces nitrogen" (RIDEM OWTS program). These areas cover parts of Westerly, Charlestown, South Kingstown, Narragansett and North Kingstown.
The Salt Pond Region plan (650-RICR-20-00-3) covers Westerly, Charlestown, South Kingstown and Narragansett, and the Narrow River plan (650-RICR-20-00-4) covers Narragansett, North Kingstown and South Kingstown. Under the state OWTS rules, nitrogen-reducing technology must cut total nitrogen by at least 50% and reach 19 mg/l or less. Check your lot with RIDEM's critical resource area boundary tool, then read our salt pond nitrogen rules guide and the nitrogen-reducing septic systems page.
Costs, loans and next steps
RIDEM's published ranges put a cesspool-to-septic replacement at about $10,000 to $15,000 for a conventional system and $23,000 to $32,000 for an advanced nitrogen-reducing system (RIDEM OWTS program). The figures are undated, so treat them as a starting point; real quotes depend on soils, groundwater and lot size.
Most South County towns take part in the Community Septic System Loan Program. Under the RIIB SFY2026 plan, homeowners pay 1% per year on the balance plus a $300 origination fee, for up to 10 years. RIHousing says most programs cap loans at $25,000; Narragansett caps at $20,000 for failed systems, and Exeter is not listed as participating. Confirm current terms with your town or RIHousing before you plan around them.
The work itself follows a set order: a licensed designer prepares the plan, RIDEM issues the permit, and a licensed installer builds the system. Start with our cesspool replacement page, the cost guide and the septic loan program guide. When you are ready, call 401-535-7951 for a free estimate.
RIDEM reviews septic plans in three stages: site suitability, design review and installation inspections. The agency lists review times of about 1 to 2 weeks for repair applications and about 3 weeks for new construction or alterations (RIDEM OWTS program). Soil testing can add time, because seasonal high groundwater readings are taken in the wet season, January 1 through April 1 (OWTS rules). Owners facing a sale deadline should start early.
This is general information, not legal or tax advice.
Last verified 18 September 2026 against the Rhode Island General Laws, RIDEM, RIIB and RIHousing sources linked on this page.
Rhode Island cesspool law questions
Do all cesspools in Rhode Island have to be replaced now?
Not on a single statewide date. State law forces replacement at sale or transfer, when a cesspool fails, inside the 200-foot protection zones, and where a sewer stub is available. RIDEM says every cesspool in the state pre-dates 1968 and must eventually be replaced, and some towns, such as South Kingstown, set their own earlier deadlines. See the RIDEM OWTS program.
Does the one-year rule start at the purchase agreement or at closing?
At closing. The statute counts twelve months from the date of sale or transfer, and RIDEM describes it as one year from the closing date. The purchase and sale agreement controls who pays and how, but the enforcement clock runs from the day title changes hands.
Can I sell a house in Rhode Island that still has a cesspool?
Yes. The law does not block the sale. It requires the cesspool to be replaced or connected to sewer within 12 months after closing, and it leaves the question of who pays to the buyer and seller. The seller must still give the disclosure notice and allow the buyer's inspection period.
I inherited a house with a cesspool. Does the rule apply to me?
A transfer between a parent and child, between spouses, between full siblings, or into a trust for first-degree relatives does not count as a transfer under the Cesspool Act, so it does not start the one-year clock. The rule will apply when you later sell outside that group. See § 23-19.15-4.
What happens if the new owner misses the 12-month deadline?
The new owner is in violation and can face RIDEM enforcement. Expedited citations under chapter 42-17.6 can reach $5,000, and each day of noncompliance can count as a separate offense. Local towns may add their own fines. Starting the design and permit early is the simplest protection.