Hillsborough's Water Bill Problem Lives on One Side of the Town Line

Two homes can both have a Hillsborough address and both get water from the Town of Hillsborough. At average household use, one pays about $112 a month for water and sewer and the other pays about $219. The difference is whether the parcel sits inside the town limits, and the mailing address won't tell you. The town says so directly: "Many people have a Hillsborough mailing address but do not live in town limits," and the town limits don't match the planning jurisdiction or the water and sewer service area. If you're comparing Hillsborough with Chapel Hill or Carrboro, start with that line. The town's reputation for high utility bills makes more sense once you do.

What the Town Line Does to a Monthly Bill

Hillsborough's rates for fiscal year 2027 took effect July 1, 2026. Inside town limits, water costs $26.64 for the first 2,000 gallons and $13.32 for each 1,000 gallons after that. Sewer costs $37.50 for the first 2,000 gallons and $18.75 for each additional 1,000. Outside town limits, the same service costs $51.94 and $25.97 for water and $73.12 and $36.56 for sewer. According to the town's water and sewer rates page, outside customers pay 1.95 times the in-town rate. Average residential use from July 2025 through June 2026 was about 3,500 gallons a month.

The table below runs those schedules at two usage levels and adds the comparison most Hillsborough shoppers make, which is OWASA, the utility for Chapel Hill and Carrboro. OWASA's schedule took effect October 1, 2026. For a standard 5/8-inch residential meter, it charges a $26.74 water service charge and a $21.83 sewer service charge. Water costs $0.00479 per gallon for the first 2,000 gallons and $0.01162 per gallon from 2,001 to 5,000. Sewer costs $0.01179 per gallon.

These figures are calculated from the published schedules. They leave out other fees and any OWASA surcharges.

At the town's average usage, an in-town Hillsborough bill comes in slightly below OWASA's. At 5,000 gallons the order reverses, because Hillsborough charges a flat rate per 1,000 gallons past the minimum while OWASA's rate rises in steps. Either way, the in-town gap is under $10 a month. The outside-town bill is the one that stands apart, at almost double either of the others.

Why a Small System Charges What It Charges

The higher costs come from how the system is built. Hillsborough serves about 6,910 accounts and an estimated 13,995 people as of the start of fiscal year 2027. That's a small base for covering treatment plants, a reservoir and miles of pipe. The town sits near the start of the Eno River, where the drainage basin is small. The town says partnering with a neighbor isn't practical: Chapel Hill and Carrboro are in a different river basin, and an earlier evaluation found a Durham partnership too expensive.

Bills also carry debt, which the town lists on its rates page:

• $17.8 million for wastewater treatment plant upgrades, with payments through 2034
• $10.2 million for the West Fork Eno Reservoir expansion completed in 2021, with payments through 2042
• $3.3 million for the roads project tied to that expansion, with payments through 2030

Water and sewer regulations add more cost. Hillsborough's watershed drains to Falls Lake, so its treated wastewater has to meet state limits that the town describes as the strictest in the nation. Stage 2 of those rules is expected in 2036 and will likely require more plant upgrades. The town's hilly terrain also means it runs 25 sewage pump stations in about 5 square miles. The town says most were built by developers, are old, and weren't built to today's standards.

These costs are spread across every customer. The town gives four reasons outside customers pay more: cost of service, growth management, investment risk, and equity. Serving homes farther from the treatment plants takes more travel and pumping, and fewer customers share those costs. When the town borrows for projects like the reservoir, it pledges its rate-setting authority as collateral, and in-town customers carry that risk. In-town owners also pay municipal property taxes that fund staff supporting the utility. The town also says lower in-town rates "can make annexation more desirable."

The Bills Are Not Done Rising

These cost pressures explain why rates keep going up. WRAL reported in March 2026 that the consulting firm Raftelis recommended 7.5% rate increases over the next three fiscal years so the town could keep covering its debt. The firm also found maintenance costs were about 20% higher than the previous fiscal year. The same WRAL report said Tropical Storm Chantal in July 2025 knocked out the town's river pump station and damaged other water infrastructure. It also noted that the town had approved a 7.5% increase about a month before the storm. In the same WRAL story, Raftelis's Vanessa Bryant called it "an industry-wide trend," adding, "We're facing some pretty high capital costs."

The adopted budget followed that recommendation for this year. The town's July 1, 2026 announcement lists a 7.5% water and sewer increase, a residential stormwater fee raised by $15 to $120 a year, and no change to the property tax rate of 51.3 cents per $100 of value. A later town notice estimated that a household using 4,000 gallons a month would pay about $9 more in town and about $17.50 more outside town. The rates page says the fiscal 2026 rate study showed increases are needed "in Fiscal Year 2027 and in future years" to keep up debt coverage and 365 days of cash on hand.

Because outside rates are a multiple of in-town rates, each percentage increase adds about twice as many dollars outside the line. OWASA's most recent increase, effective October 1, 2026, was 4%, which OWASA said averages $4.03 more per month for residential customers. If Hillsborough adds increases on the schedule Raftelis recommended, today's near-tie between in-town Hillsborough and OWASA may not hold.

The Trade That Flips With Home Value

Here the comparison gets more interesting. An outside-town home on town water and sewer pays more for utilities but doesn't pay Hillsborough's municipal property tax. An in-town home pays that tax and gets the lower rates, plus town services such as streets and police protection.

At 3,500 gallons a month, the outside-town premium for water and sewer is about $106.60 a month, or roughly $1,279 a year. Hillsborough's tax rate of 51.3 cents per $100 produces that same $1,279 at an assessed value of about $250,000. Comparing only those two costs, the town tax is the larger one above that value, and the utility premium is the larger one below it. On a home assessed at $400,000, the town tax is about $2,052 a year.

Many outside-town properties only get water from the town. Orange County's water and sewer agreement lists those outside areas as water service. For a water-only home at 3,500 gallons, the premium is about $44 a month, or roughly $531 a year. The town tax reaches that amount at an assessed value of about $104,000. For most homes on the market, that means water-only outside-town service costs less than in-town status on these two items.

This comparison covers costs only. It's a way to read a listing, and it doesn't put a value on what town services are worth to a particular household.

Where Outside-Town Service Exists, and Where It Will Not Grow

The 2024 Water and Sewer Management, Planning and Boundary Agreement among Orange County, Hillsborough, Carrboro, Chapel Hill and OWASA names existing Hillsborough water service outside its primary area. The listed areas include NC 86 South toward New Hope Church Road; Joppa Oaks, Byrdsville, Wyndfall and Strayhorn Hills; the area around Wayside Baptist Church; land across Strouds Creek Road from Mars Hill Baptist Church and Pathways Elementary; Orange Grove Road southwest of I-40; New Grady Brown School Road to Dimmocks Mill Road; and Old Grady Brown School Road.

In November 2025, Hillsborough also made its service area smaller. A November 24, 2025 resolution revised the Urban Service Boundary after staff raised concerns about wastewater capacity and Falls Lake nutrient limits. Under the new policy, the town won't extend new mains beyond the boundary or upsize existing mains outside it. New single-family homes, duplexes, triplexes and ADUs may still connect to existing water lines if no main extension is needed and pressure and water quality are adequate. For buyers looking at land or older homes on wells near that boundary, the main question is whether a town water line already reaches the property.

How to Read a Listing Before You Fall for It

The town's Services for Your Property page walks through the check on the Orange County interactive zoning map:

1. Search the parcel by street address, owner name or parcel ID.
2. Read the background shading. Dark gray means inside town limits. Light gray means outside town limits but inside the extraterritorial jurisdiction. A colored background means outside both.
3. Turn on the "Water Sewer Jurisdictional Boundary" layer. Primary Service Area means service may be available, though not everywhere. Long-Term Service Area means the area is not a current focus for expansion.
4. For a parcel-specific answer, use the town's water and sewer availability inquiry. Properties outside the town's area may be served by Orange County Environmental Health, the Orange-Alamance Water System or OWASA.

Orange County's GIS maps include a Municipal Boundary layer you can use as a second check. The town also notes that a home inside town limits gets town water and sewer only "if available," and connecting requires approval and fees. Being inside the limits doesn't prove a house is connected.

A Few Direct Questions

Is Hillsborough water more expensive than Chapel Hill's? Inside town limits, the two are close. With rates in effect in October 2026, an in-town Hillsborough bill at 3,500 gallons is about $112, compared with about $117 from OWASA. Hillsborough customers outside town limits pay about $219.

Can a home outside town limits annex to get in-town rates? The town says lower in-town rates can make annexation more desirable for areas that already have service. Its current pages don't describe a blanket annexation requirement, so the town is the place to ask about a specific parcel.

Can a house with a failing well connect to town water? Under the November 2025 policy, existing structures with failing wells may connect to existing mains when a county or state health agency requests it for a public health need and service standards can be met.

If you're weighing a Hillsborough listing against one in Chapel Hill or Carrboro and want help working out where the town line falls and what it means for monthly costs, Tana Widdows can pull the parcel maps and utility rates with you before you write an offer. Let's Connect.

This article is general information, not legal, tax or financial advice. Consult a qualified professional about your situation.