Raleigh Water Quality Report 2026: What’s in Your Tap Water

QUICK SUMMARY:

Overall Rating: Fair to Good
Top Contaminants of Concern: Disinfection byproducts (trihalomethanes and haloacetic acids formed when chloramine meets the organic matter in the Falls Lake supply), plus hexavalent chromium
Recommended Filter Type: Reverse osmosis for drinking water — the one technology that reduces the byproducts and chromium-6 together — paired with a catalytic-carbon whole-house filter for the chloramine at every tap. See the best reverse osmosis systems and best whole house water filters guides.
Water Hardness: Soft — low single-digit grains per gallon

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The City of Raleigh Public Utilities department — the utility most residents know as Raleigh Water — tests its supply for well over a hundred substances and reported compliance with federal health-based standards for the most recent reporting period. That much is accurate, and it is the part most residents already assume when they turn on the tap.

Here’s what the data actually shows beyond the compliance headline. The disinfection byproducts that form when Raleigh chloraminates its surface water — the trihalomethanes and haloacetic acids — are genuinely low relative to other surface-water systems, but they are present in every tap, they are the most consistently detected regulated group, and they sit above the stricter, health-based benchmarks the Environmental Working Group derives from cancer-risk research. Hexavalent chromium is detected at a low but persistent level that carbon filters cannot touch. None of these is a legal violation. All of them sit above the health-based guidelines, and the gap between “legal” and “free of health concern” is exactly what a well-chosen filter is built to close.

Where Does Raleigh Get Its Water?

Raleigh is a surface-water city. Most of its drinking water begins in Falls Lake, the reservoir on the Neuse River north of the city, and is treated at the E.M. Johnson Water Treatment Plant. A second source, Lake Benson, feeds the Dempsey E. Benton Water Treatment Plant, which serves the southern part of the service area. Both are impounded surface waters drawn from the Neuse River basin, and the system operates under the single public water system identifier NC0392010.

The source matters because it shapes the contaminant list. Surface water is rich in dissolved organic matter — decaying leaves, algae, and runoff that a lake and its watershed accumulate — which is harmless in itself but serves as the raw material for the disinfection byproducts discussed below. That same surface-water origin is why Raleigh’s water is soft rather than hard: it has not spent long enough moving through mineral-rich rock to pick up the calcium and magnesium that define a groundwater system like Phoenix or San Antonio.

How Raleigh Disinfects: Chloramine, With a Spring Chlorine Conversion

This is the detail that determines which filter you need. Raleigh disinfects with chloramine — chlorine combined with a small amount of ammonia — as its year-round residual, rather than with free chlorine alone. Chloramine is more stable across a long distribution network and forms fewer regulated byproducts, which is why many large surface-water systems use it. It is also the source of the flat, faintly chemical taste that many residents notice.

There is a seasonal exception worth planning around. Once a year, Raleigh Water temporarily converts its system from chloramine to free chlorine — a maintenance practice sometimes called a “chlorine burn” — typically from about the last week of February through the first week of April. The conversion clears the distribution mains, but it also raises the chlorine residual for several weeks and can push disinfection byproducts higher during that window. Washington, DC and Philadelphia run the same annual free-chlorine period, and the practical takeaway is the same in all three: taste and byproduct levels tend to peak in that late-winter-to-spring stretch.

That disinfection choice has one consequence for filtration: chloramine is harder to remove than free chlorine. Ordinary activated carbon, which strips free chlorine easily, reduces chloramine slowly and incompletely. To address it at the whole-house level you want catalytic carbon — a carbon media processed to speed the reaction that breaks chloramine apart. This is not an optional refinement here; it is the difference between a filter that works on Raleigh’s water and one that mostly does not. Our explainer on chloramine vs chlorine in tap water covers why the disinfectant choice changes both the byproduct picture and the filter that fits.

What Contaminants Are in Raleigh Tap Water?

The table below draws on the EWG Tap Water Database, which compiles the utility’s own reported test data, alongside Raleigh Water’s annual Consumer Confidence Report. One column needs explaining first. The EPA’s Maximum Contaminant Level (MCL) is the legal limit — the figure a utility cannot exceed without a violation. The EWG Health Guideline is a stricter, health-based benchmark, generally set at a one-in-one-million lifetime cancer risk and, in several cases here, derived from the California Office of Environmental Health Hazard Assessment’s public health goals. The gap between the two columns is where most of the meaningful risk lives, because several of these federal legal limits were set decades ago and have not been revisited since.

Contaminant	Detected Level	EPA MCL	EWG Guideline	Health Concern
Total trihalomethanes (TTHMs)	~15.5 ppb (Johnson) / ~14.3 ppb (Benton)	80 ppb	0.15 ppb	Cancer (bladder), fetal development
Haloacetic acids (HAA5)	~19.0 ppb (Johnson) / ~14.0 ppb (Benton)	60 ppb	0.1 ppb	Cancer, reproductive harm
Chromium-6 (hexavalent)	~0.056 ppb (56 ppt)	— (100 ppb total Cr)	0.02 ppb	Cancer
Lead (90th percentile)	~3 ppb	15 ppb (action level)	0 ppb	Neurological damage

Read the disinfection byproducts first, because they define Raleigh’s water. Total trihalomethanes (TTHMs) — a family of four compounds formed when disinfectant reacts with organic matter — run at roughly 15.5 parts per billion at the E.M. Johnson plant and about 14.3 ppb at Dempsey Benton. The regulated haloacetic acids (HAA5) run about 19.0 ppb at Johnson and 14.0 ppb at Benton. Here the distinction matters. These numbers are genuinely low: they sit at roughly a fifth of the 80 ppb TTHM ceiling and a quarter to a third of the 60 ppb HAA5 ceiling, well below what many surface-water systems report. They are still present system-wide and above EWG’s health guidelines, and they rise seasonally in warm months and during the spring free-chlorine conversion. The honest framing is that these are the contaminant present in every tap and the most consistently detected regulated group, comfortably within legal limits but above the health-based benchmarks — not a system running near its limits.

Hexavalent chromium behaves differently, because carbon does not remove it. Chromium-6 — the compound made famous by the Hinkley, California case — is detected at about 0.056 ppb (56 parts per trillion) in independent EWG data. There is no separate federal limit for it, only a 100 ppb limit for total chromium, so it is far within the law, but it runs close to three times EWG’s 0.02 ppb health guideline. It is reduced by reverse osmosis rather than by carbon, which is why the filter section below leads with RO. For the chemistry behind it, see our guide to chromium-6 in drinking water. You can review the full contaminant list for the system at the EWG Tap Water Database entry for Raleigh.

A note on PFAS, the “forever chemicals” many readers now ask about: North Carolina carries a statewide PFAS concern, and the Cape Fear region around Wilmington and Fayetteville has documented some of the highest levels in the country. Raleigh sits in a different river basin, and while it does have PFAS detections, they run lower than the Cape Fear systems, and the city currently meets the federal PFAS limits finalized in 2024. It is a contaminant worth watching as monitoring data accumulates, but on the current regulated data it is not the headline concern for Raleigh’s treated supply.

What About Lead in Raleigh?

Lead deserves a separate, brief note because it behaves differently from everything above. The disinfection byproducts and chromium-6 are in the water as it leaves the treatment plant. Lead is not — it enters water after treatment, by leaching from lead service lines, lead solder, and brass fixtures inside older buildings, and it does not appear in a system-wide average in a way that tells you what is happening at your own tap.

Raleigh’s most recent 90th-percentile lead result was about 3 ppb, well under the 15 ppb federal action level, and the water leaves the treatment plants essentially lead-free. The variable is your own building. Homes and buildings constructed before the 1986 federal ban on lead solder can still contain lead in their internal plumbing, and any remaining lead service lines — which North Carolina utilities are now cataloging under the state-required service line inventory — are the other unknown. The only way to know your exposure is to test at your own faucet. Our lead in drinking water guide covers the sources and the removal options.

Raleigh Water Hardness

Raleigh’s water is soft. Because the supply is surface water from Falls Lake and Lake Benson rather than mineral-rich groundwater, reported hardness runs in the low single digits of grains per gallon — a world away from the very hard groundwater of Texas and Florida. Hardness is not a health concern in either direction; the EPA does not regulate it.

At this softness you will see little scale on fixtures or inside your water heater, and soap lathers easily. A whole-house softener is not something most Raleigh homes need, which simplifies the decision here: the case for whole-house treatment in this city is about the chloramine and its byproducts, not about hardness. Our hard water guide and solutions explains where softening does and does not earn its cost.

Best Water Filters for Raleigh Residents

Raleigh’s profile points to a clear priority. The dominant issue is disinfection byproducts, which both catalytic carbon and reverse osmosis reduce — but chromium-6 sits alongside them, and carbon does not remove it. That combination makes reverse osmosis the most complete single answer for drinking water, supported by whole-house catalytic carbon for the chloramine and byproducts that reach every tap.

The options below are matched to that profile, not copied from a default list. Each carries third-party certification to a specific NSF/ANSI standard from an accredited certifier. Certification is listed by model, not by brand, so verify the exact model in the certifier’s database before buying.

Reverse Osmosis: Waterdrop G3P800

Reverse osmosis is the strongest match for Raleigh because the semipermeable RO membrane rejects dissolved contaminants broadly — which is what lets it reduce chromium-6, the contaminant carbon leaves behind, alongside the trihalomethanes and haloacetic acids. The Waterdrop G3P800 is certified by IAPMO R&T to NSF/ANSI Standards 58, 42, 53, and 372 — Standard 58 being the reverse osmosis standard that governs total dissolved solids reduction, and Standard 372 covering lead-free materials. IAPMO R&T is an accredited certifier to the NSF/ANSI standards; because the certification is IAPMO’s rather than NSF International’s, it is a genuine certification but will not appear in NSF’s own database. Its tankless design fits under a standard sink and produces water faster than older tank-based units.

The trade-offs are inherent to the technology, not flaws in this model. Reverse osmosis strips beneficial minerals along with contaminants, so the water tastes flat to some people; it sends a portion of feed water to the drain as concentrate, a real consideration on a metered municipal supply; and it needs an electrical outlet under the sink. One installation note worth following: connect the drain and feed line with compression fittings rather than a self-piercing saddle valve, which a growing number of local plumbing codes now discourage because of long-term leak risk. Consumer Reports’ testing consistently ranks reverse osmosis highest for breadth of contaminant removal, and this model’s certifications can be confirmed in the IAPMO R&T product database rather than taken from marketing copy. For comparisons, see our best reverse osmosis systems guide.

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Countertop Reverse Osmosis: AquaTru Classic

For renters and households that cannot or do not want to modify their plumbing, a countertop reverse osmosis unit delivers the same breadth of reduction without an installation — and the AquaTru Classic is an unusually exact fit for Raleigh. It is certified by IAPMO R&T to NSF/ANSI Standards 42, 53, 58, and 401, and its certified contaminant list specifically names hexavalent chromium, along with lead, fluoride, PFOA, and PFOS. That matters here because chromium-6 is on Raleigh’s documented detection list, and relatively few certified consumer units name that contaminant explicitly. To be precise about the label: this is an IAPMO certification, not an NSF International one, so it will not appear in NSF’s own database even though it is a genuine certification to the NSF/ANSI standards.

The limitations are real. The AquaTru is a countertop appliance with a footprint to match, so it occupies counter space and holds a finite reservoir rather than plumbing into your faucet. Like all reverse osmosis, it produces some wastewater, and its filters carry a recurring replacement cost that is higher per gallon than a simple carbon pitcher. For households weighing other no-plumbing options, our best countertop water filters guide covers the category.

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Whole House: SpringWell CF+

Because Raleigh’s chloramine and its byproducts reach every tap — and because trihalomethanes can be inhaled during a hot shower, not just ingested — a whole-house carbon system has real justification here, and it earns its keep most clearly during the late-winter free-chlorine conversion, when residual and byproducts climb. The critical detail is the media: the SpringWell CF+ uses catalytic carbon, which is the type that meaningfully reduces chloramine, where ordinary activated carbon would struggle. That makes it a better structural match for a chloramine city than a standard carbon tank. Its components are certified to NSF/ANSI 61 and 372 (the materials-safety and lead-free-materials standards); the complete system is tested to NSF standards for performance rather than holding a system-level performance certification, so the honest framing is “tested to,” not “certified” for contaminant removal. That is an accurate description of where SpringWell’s documentation stands, and it is a different and lesser claim than the model-specific certifications behind the two reverse osmosis picks above.

Two real limitations. First, a carbon system reduces chloramine and byproducts and improves taste, but it does not remove chromium-6 — so in Raleigh it is best paired with a reverse osmosis unit at the kitchen sink for that metal in drinking water. Second, whole-house systems require installation on your main line and periodic media service, a larger commitment than a point-of-use filter. Households that want a certified whole-house chloramine option specifically can also look at dealer-sold systems such as the Kinetico CRS, which is WQA-certified to NSF/ANSI 42 for chloramine, though it has no online affiliate path. Our best whole house water filters guide covers sizing.

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How to Test Your Raleigh Tap Water

Raleigh Water’s Consumer Confidence Report is a system-wide picture, measured at the plant and across the distribution network. It is the right tool for understanding the source water and the utility’s treatment performance, and the wrong tool for understanding your specific tap — especially for lead, which forms inside your own plumbing. The system-wide figures above are averages across a large service area, not a measurement at your kitchen sink.

A certified home test closes that gap. For a broad screen, Tap Score (run by SimpleLab) sends samples to accredited laboratories and returns results you can read against the same EPA and health benchmarks used here, including disinfection byproducts and chromium-6, which most hardware-store test strips cannot detect. If you live in a home built before 1986, a lead-specific test is also worth running. Our how to test your water at home guide explains the options and what the results mean.

Get a Tap Score Test

Frequently Asked Questions

Is Raleigh tap water safe to drink?

Raleigh Water treats and delivers water that meets all federal and state drinking water standards, with compliance reported for the most recent period. That said, “compliant” is not the same as “free of all contaminants.” Disinfection byproducts are genuinely low here — a fraction of the legal ceiling — but they are present in every tap and sit above the stricter EWG health guidelines, and chromium-6 is detected a little above its EWG guideline as well. For most households the water is acceptable to drink, but a reverse osmosis filter meaningfully reduces the contaminants that remain — particularly chromium-6, which ordinary carbon filters do not address.

Why does Raleigh water taste different in spring?

Once a year, typically from the last week of February through the first week of April, Raleigh Water temporarily switches from its normal chloramine disinfection to free chlorine to clear the distribution system. This “chlorine burn” raises the chlorine residual for several weeks and can push disinfection byproducts higher, which is why taste and odor often peak in that late-winter-to-spring window. A catalytic-carbon filter reduces both the chloramine and the free-chlorine byproducts, so it smooths out that seasonal swing.

Does Raleigh water have PFAS?

On the current regulated data, Raleigh’s water meets the federal PFAS limits finalized in 2024. North Carolina carries a statewide PFAS concern, and the Cape Fear region near Wilmington and Fayetteville has documented some of the highest levels in the country — but Raleigh sits in a different river basin and its detections run lower than those systems. PFAS is not the headline concern for Raleigh’s treated supply at this time, though it remains worth watching as monitoring data accumulates. Households that want certainty can run a PFAS-specific lab test.

How hard is Raleigh water?

Soft — low single-digit grains per gallon, because the supply is surface water from Falls Lake and Lake Benson rather than mineral-rich groundwater. Soft water leaves little scale and lathers soap easily, so a whole-house softener is not something most Raleigh homes need. The case for whole-house treatment here is about the chloramine and its byproducts, not about hardness — and a softener would not address either of those.

Do I need a water filter in Raleigh?

For the broadest protection, a reverse osmosis system certified to NSF/ANSI 58 addresses Raleigh’s two main drinking-water issues — disinfection byproducts and chromium-6 — in one unit, and a certified countertop RO does the same for renters with no plumbing changes. A whole-house catalytic carbon system improves the chloramine taste and reduces byproducts at every tap, and it is especially useful during the spring free-chlorine conversion, but it does not remove chromium-6. The most efficient setup for most Raleigh homes is reverse osmosis for drinking water, plus whole-house catalytic carbon if shower-and-faucet taste is a concern.

Sources Cited

EWG Tap Water Database — City of Raleigh (PWSID NC0392010): https://www.ewg.org/tapwater/system.php?pws=NC0392010
City of Raleigh Public Utilities (Raleigh Water) — 2025 Consumer Confidence Report (PWSID NC0392010): source water (Falls Lake / Lake Benson), E.M. Johnson and Dempsey E. Benton treatment plants, disinfectant residual, lead and byproduct data
raleighnc.gov — Raleigh Water quality reports and notices: source water, chloramine disinfection, and the annual spring free-chlorine conversion schedule
US EPA, National Primary Drinking Water Regulations — Stage 2 Disinfectants and Disinfection Byproducts Rule (MCLs for trihalomethanes and haloacetic acids); total chromium MCL
US EPA Lead and Copper Rule — lead action level and 90th-percentile monitoring
US EPA PFAS National Primary Drinking Water Regulation — PFAS MCLs finalized 2024
IAPMO R&T product database (pld.iapmo.org) and NSF International certified product listings (info.nsf.org)

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