Triangle Water Quality Report 2026
Utility-by-utility data on hardness, disinfectants, PFAS detections, and lead service lines across 30 Triangle cities.
Most people in the Triangle don't know what's in their water beyond "it tastes a little weird sometimes." That's not your fault — utilities publish Consumer Confidence Reports (CCRs) every year, but they're 30-page PDFs written for the EPA, not for homeowners. We're reading those CCRs across 30 Triangle utilities and turning them into something you can actually use.
The published report covers City of Raleigh Public Utilities, Town of Cary, City of Durham Water Management, OWASA, Town of Apex, Town of Wake Forest, Town of Holly Springs, Town of Morrisville, Town of Garner, Town of Knightdale, Fuquay-Varina, and the rest of the 30-city authority area — plus the well-water profile for rural Wake, Durham, Orange, and Johnston counties. Hardness ranges, disinfectant type, PFAS detection history, lead service line inventory status. Full report Q2 2026.
The 30 utilities serving the Triangle
The Triangle gets its water from roughly 30 utilities depending on where you draw the boundary. The big three — City of Raleigh, OWASA (Chapel Hill), and the Cary/Apex Water Treatment Facility — supply most municipal demand. Durham operates separately. Then there are smaller systems serving Wake Forest, Holly Springs, Garner, Knightdale, Wendell, Zebulon, Pittsboro, Hillsborough, Carrboro, and the rural areas between.
All of them source from surface water — primarily Falls Lake (Raleigh), Jordan Lake (Cary/Apex/Morrisville), Cane Creek + University Lake (OWASA), and Lake Michie + Little River Reservoir (Durham). The Triangle is a surface-water region. Wells exist but only dominate in rural pockets — south Apex, parts of Holly Springs, the eastern edges of Wake County, and most of Chatham + Orange outside the OWASA service area.
Each utility publishes an annual Consumer Confidence Report (CCR) documenting contaminant levels, treatment methods, and detection events. The CCRs are dense and not designed for homeowner decisions. This report distills the 2024 CCRs across all 30 utilities into the four questions that actually matter: what's in your water, how hard it is, what disinfectant it's treated with, and whether your home has lead-related risk.
Hardness across the Triangle: city-by-city
Triangle water is soft. That's the headline. Despite older references suggesting hardness in the 5-8+ GPG range, primary-source data from utilities, the Raleigh Home Brewers Association, and USGS hardness maps confirm Triangle municipal water consistently tests at 1.0-2.7 GPG (very soft to slightly hard).
Specifically: Raleigh sits at 1.4-1.7 GPG (Falls Lake source). Cary and Apex test at 1.5-1.8 GPG (Jordan Lake). Durham is among the softest in the Triangle at 1.0-1.5 GPG. Chapel Hill (OWASA) is slightly higher at 1.8-2.2 GPG — still classified as slightly hard.
Practical implication: most Triangle homeowners don't need a dedicated water softener for hardness alone. A standalone softener at this hardness level is mostly overkill. The bigger water-quality wins in the Triangle come from removing disinfectants (chloramine/chlorine), addressing PFAS at the drinking-water tap, and filtering out disinfection byproducts (THMs, HAA5).
The exception: well water. Triangle wells frequently test at 10-20+ GPG with concurrent iron, manganese, and acid pH issues. If you're on a well, your situation is entirely different — see section 6.
Disinfectant types and what they taste like
Public water systems in the Triangle disinfect with either chloramine (chlorine + ammonia) or free chlorine. Both kill pathogens. Both leave a residual in your tap water. They taste, smell, and filter differently.
Chloramine cities: Raleigh, Cary, Apex, Morrisville, Wake Forest, Garner, Knightdale, Holly Springs, Fuquay-Varina, Rolesville, Wendell, Zebulon. Most of the Wake County urban core uses chloramine because it's more stable through long distribution lines and produces fewer disinfection byproducts than free chlorine. The downside: chloramine has a flatter, slightly sweet smell that some people describe as 'pool water'. It's also harder to remove than chlorine — standard carbon filters don't fully strip it. You need catalytic activated carbon (CAC) or a longer contact time to handle chloramine.
Free chlorine cities: Durham, Chapel Hill (OWASA), Hillsborough, Pittsboro, Carrboro. These utilities have shorter distribution loops or different operational preferences. Free chlorine produces a sharper bleach-like taste at higher concentrations and dissipates if water sits out. It's also easier to filter — standard activated carbon removes it efficiently.
Both disinfectants commonly come paired with trihalomethanes (THMs) and haloacetic acids (HAA5) — byproducts that form when chlorine reacts with organic matter in source water. These are tracked separately on the CCR and need carbon filtration to remove.
PFAS detection: where, when, and at what levels
PFAS — per- and polyfluoroalkyl substances, often called 'forever chemicals' — are the highest-profile water contaminant in the Triangle right now. They don't break down in the environment, accumulate in human tissue, and have been linked to immune system effects, hormone disruption, and certain cancers.
EPA finalized enforceable maximum contaminant levels in 2024: 4 parts per trillion (ppt) for PFOA and PFOS individually, 10 ppt for several other compounds. Utilities have until 2027 to comply. That deadline matters because most Triangle utilities currently detect PFAS at trace levels — some above 4 ppt — and will need treatment upgrades to meet the new standards.
OWASA (Chapel Hill) is the most-affected Triangle utility. Their 2024 testing program found 11 PFAS compounds in raw Cane Creek Reservoir water and 9 still present after standard treatment. OWASA is piloting advanced PFAS filtration — granular activated carbon (GAC) and ion exchange resin — to meet the 2027 deadline. Until those plant-level upgrades complete, the only reliable point-of-use protection is reverse osmosis (RO) with NSF P473 certification at your kitchen sink.
Raleigh, Durham, Cary, Apex all detect PFAS at lower trace levels (~9-12 ppt across various compounds). Below today's 4 ppt enforcement floor in some readings, above it in others. The Cape Fear basin sources — primarily Cary/Apex via Jordan Lake — carry upstream PFAS from Chemours operations in Fayetteville and historical Burlington / Greensboro wastewater. The further upstream the source, the more PFAS-exposed.
Practical move: if PFAS is a concern, install under-sink RO with NSF P473 certification. Whole-home carbon filtration alone does not consistently remove PFAS at the levels documented in finished Triangle water. The drinking-water tap is the leverage point.
Lead service lines: what the inventory says
Triangle utilities deliver lead-free water at the treatment plant — all four major systems (Raleigh, Durham, OWASA, Cary/Apex) test below 0.005 ppm at the meter. The 2023 EPA Lead and Copper Rule Revisions require all utilities to maintain a public Lead Service Line Inventory; you can look up your specific address through your utility's website.
The actual lead risk is in older home plumbing, not the supply. Pre-1986 homes commonly have lead solder in copper joints. Pre-1950s homes may have galvanized iron pipes that have leached lead from the supply line over decades. The Lead and Copper Rule sets the action level at 15 ppb for lead at the tap.
Triangle neighborhoods with concentrated pre-1986 housing stock: Five Points and Mordecai in Raleigh; Trinity Park, Old North Durham, and Walltown in Durham; the historic UNC-area neighborhoods in Chapel Hill; Cameron Village; downtown areas of every major city. If your home was built before 1986 and you've never tested the tap-level lead, a $25 home test kit from any hardware store is a worthwhile baseline.
Whole-home filtration does not remove lead — the filter sits BEFORE most of your home's plumbing. The reliable protection for older homes is point-of-use RO at the kitchen sink, which removes lead leached after the supply enters your home.
Wells in the Triangle: prevalence and common issues
Private wells serve roughly 12% of Triangle households — concentrated in southern Apex, rural Holly Springs, the eastern edges of Wake County (Wendell, Zebulon, parts of Knightdale), most of Chatham and Orange counties outside the OWASA service area, and the agricultural areas of southern Wake.
Common Triangle well issues (in rough order of prevalence): hardness (10-20+ GPG is normal — five to ten times harder than municipal supply), iron (orange/red staining), acid pH (5.0-6.5, corrodes copper plumbing), manganese (black staining), hydrogen sulfide (rotten-egg smell), sediment, and occasional bacterial concerns (E. coli, total coliform).
Well water is unregulated — there is no CCR for a private well. Your municipal-water neighbors get an annual testing report. You don't. The standard recommendation is to test your well every 12 months for the basics (bacteria, pH, hardness, iron, manganese, nitrates) and every 5-10 years for the longer panel (heavy metals, VOCs, pesticides if you're near agriculture).
Filtration for wells: a single system rarely handles every issue. The standard Triangle well-water setup is a sediment pre-filter, an iron/manganese oxidation stage, water softening for the hardness, optional UV sterilization for bacterial concerns, and often a separate under-sink RO for drinking water. Total cost runs $4,500-$7,500 installed depending on which issues your specific well presents.
If you're on a well in the Triangle and have never had your water professionally tested, that's where to start. We test for the relevant well-water markers as part of every free water report request, and we'll tell you whether a well-specific filtration package is actually needed for your situation.
Parker Smith
Founder, Raleigh Water Pros
Parker founded Raleigh Water Pros to bring clean, soft water to families across the Triangle. He works with NC-licensed plumbers on every install, lives in the area, and writes the newsletter himself.
Q2 2026 · Coming Soon
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Full report publishes Q2 2026 · Last updated May 26, 2026