Raleigh Water Quality Guide: Tap Water, Wells and Filters

Where does Raleigh's tap water come from?

Raleigh Water (public water system ID NC0392010) draws from two reservoirs. Its 2025 report lists Falls Lake in northern Wake County and Lake Benson in Garner, and says the utility serves about 650,000 residents. The report's state source water assessment rates both sources as having High susceptibility to contamination (assessed September 9, 2020). That is a measure of potential exposure to nearby land uses, not a statement that the finished water is poor.

• Falls Lake: treated at the E.M. Johnson Water Treatment Plant, which Raleigh says averages about 41 million gallons a day (maximum capacity 86 MGD). Most of the city's supply comes from Falls Lake.
• Lake Benson: treated at the Dempsey E. Benton Water Treatment Plant, which averages about 10 MGD (maximum 20 MGD). Its process includes ozone, coagulation and settling, two-stage filtration, and UV plus chloramine disinfection, and it supplies customers in Raleigh and Garner.

Raleigh's report covers the system as a whole rather than street by street. Raleigh's monthly finished-water reports and annual report are the best way to see system-wide results.

How is Raleigh water treated: chlorine or chloramine?

Raleigh uses chloramine (chlorine combined with ammonia) as its main disinfectant, with a planned seasonal switch. According to Raleigh Water's report page, the utility usually switches from chloramine to chlorine from the last week of February through the first week of April. Some customers notice a stronger chlorine smell during that window.

In the 2025 report, chloramines averaged 2.80 ppm and chlorine 2.26 ppm, both under the 4 ppm limit. Fluoride averaged 0.71 ppm. Total trihalomethanes averaged 34.2 ppb (limit 80) and haloacetic acids 22.0 ppb (limit 60). The EPA says water with chloramines that meets its standards is safe for drinking, cooking and bathing.

How hard is Raleigh water?

Soft. The 2025 report lists total hardness averaging 25.2 ppm as calcium carbonate (range 21.9 to 35.3), roughly 1.5 grains per gallon, and Raleigh's own materials describe it as typically 25 to 30 mg/L. The utility says a softener is not necessary for its water. Hardness can differ in other systems and on wells, so see whole-house filter vs. water softener before buying either.

How to read Raleigh's annual water quality report

1. Open the Raleigh Water Reports page. It links the annual Consumer Confidence Report (CCR) and monthly finished-water reports.
2. Check the report year. A CCR covers the previous calendar year.
3. In the contaminant table, compare the detected level with the MCL (the legal limit) and the MCLG (the health goal). Pay attention to the units: ppm, ppb and ppt differ by factors of 1,000.
4. Look at lead and copper. Raleigh tested 85 sites in 2025; the 90th-percentile lead result was non-detect and no site exceeded the 15 ppb action level.
5. Check disinfection byproducts (TTHMs and HAA5) and the disinfectant levels.
6. Look for hardness, pH and sodium in the other-results section, then visit the utility's PFAS page, since the CCR itself notes PFAS testing is voluntary and posts results online.

If you live in Cary, Morrisville or the RTP area, use Cary's 2025 water quality report instead. Apex has its own water quality page.

Is there PFAS in Raleigh's drinking water?

Raleigh Water says PFAS have been found at very low levels, in parts per trillion, in untreated water and in some cases in treated water. Its PFAS page reports monitoring since 2013, typical results ranging from non-detect up to about 4 ppt for PFOA, 5.5 ppt for PFOS and 3.5 ppt for PFBS, and a reported hazard index of 0.0017. The utility says it is currently meeting the 4 ppt limit for PFOA and PFOS and is optimizing powdered activated carbon treatment. It also states that source-water PFAS levels appear to be decreasing, and that its most recent quarterly sampling event came back below detection limits.

Federal rules are in flux. The EPA's PFAS page says the 2024 rule set 4 ppt limits for PFOA and PFOS, with compliance due by 2029. Proposals dated May 18, 2026 would keep the PFOA and PFOS limits, let systems request two more years (to 2031), and rescind limits for PFHxS, PFNA, HFPO-DA and the mixture hazard index. These are proposals, so check the EPA page for the current status.

Cary reports its own results from Jordan Lake. Its 2025 report lists an average PFOA of 1.3 ppt (range non-detect to 3.9) and notes powdered activated carbon has been used since 2018. For background, see PFAS in drinking water: what homeowners should know.

Why does Raleigh water sometimes taste earthy or musty?

Raleigh Water has attributed musty tastes and odors to seasonal changes in Falls Lake. Temperature and sunlight can lead algae to release compounds that produce earthy or musty flavors. The utility describes the issue as purely aesthetic, says the water remains safe and meets regulatory standards, and says it increases activated carbon and ozone treatment when it happens. It adds that flushing through the distribution system can take a few days.

Taste and odor events are different from a health advisory. A carbon filter with NSF/ANSI 42 certification is the usual home approach for chlorine taste and odor. Chilled water with a lemon wedge also helps, per the utility.

Wake Forest, Garner, Cary, Apex, Wendell, Knightdale and Rolesville: who supplies your water?

The practical takeaway: homes in Raleigh, Garner, Wake Forest, Knightdale, Rolesville, Wendell and Zebulon share one report, while Cary and Apex water comes from a different lake and a different set of reports. Hardness, PFAS results and taste events can differ between those two groups.

Why do some Raleigh homeowners still filter their water?

• Taste and smell: chlorine in the spring switch window and earthy flavors during algae season.
• PFAS caution: even at low levels, some households prefer a filter certified for PFAS reduction.
• Chloramine: some people want it reduced for taste or for fish tanks.
• Older plumbing: lead can come from household fixtures or solder, not just the main.
• Private wells: where the need is greatest, because nobody tests the water for you.

Do older Raleigh homes have lead service lines?

Raleigh Water's 2025 report states that it has never found a lead pipe and that lead goosenecks are extremely rare. It says it replaces galvanized service lines that could carry lead from goosenecks. Cary reports no known lead service lines, though about 6,800 connections had a segment of unknown material still being verified.

Lead can still come from home plumbing. The EPA notes that brass faucets and lead solder are common culprits where service lines are not lead. Use cold water for drinking and cooking, flush after water sits, clean faucet aerators, and test if you are unsure.

Raleigh-area situations: city water, older homes and private wells

More than 40,000 Wake County households rely on private wells, according to a March 2025 county release. If you pay a Raleigh or Cary water bill, the utility tests your water. If you have a well, you are responsible.

If X, then do Y

• City water, no complaints: read the annual report and use a pitcher or faucet filter if you just want better taste.
• City water, musty or chlorine taste in spring: try a carbon filter certified to NSF/ANSI 42.
• Pre-1986 home or unknown plumbing: test for lead and consider a filter certified to NSF/ANSI 53 for lead.
• Private well, never tested or over five years: order the county's First Timer's Package.
• Private well in eastern Wake or near the county line: add the Rads Package and a radon-in-air test.
• Well with sulfur smell or staining: ask for sulfur or iron bacteria testing before buying equipment.
• Well in Johnston County: contact Johnston County Environmental Health at 919-989-5180; radionuclide testing there requires a private certified lab.

Wake County's well testing page lists a First Timer's Package (coliform bacteria, inorganics, VOCs, pesticides), a Rads Package (uranium, radon in water, gross alpha and a radon-in-air kit), and a trip fee when staff collect the sample. It recommends testing for bacteria every year and other contaminants about every five years. Johnston County's private well page describes its sampling options. Wake County does not certify treatment contractors.

When should you test your water?

• You are on a private well, which should be tested for bacteria yearly.
• You are buying or selling a home with a well.
• Your water changes in color, smell or taste outside the known spring windows.
• You have a new baby, or someone in the home is vulnerable, and your plumbing is old.
• After flooding, nearby construction or plumbing work.
• You plan to install treatment and want a baseline.

Use a lab certified by the N.C. Division of Public Health; do not rely on off-the-shelf kits for health decisions.

Which filter fits which concern?

NSF says PFAS reduction claims now sit under NSF/ANSI 53 and 58; the earlier P473 protocol was folded into those standards. For a comparison of costs and system types, see whole-house filter costs and do you need a whole-house filter.

What should you ask a water treatment installer?

1. Which lab results or utility report are you basing the recommendation on?
2. Which NSF/ANSI standards is the product certified to, and for which contaminant?
3. How often do cartridges or media need replacing, and what does that cost per year?
4. Is the system sized for my flow rate and household use?
5. Will you leave a written quote, warranty terms and a retest plan?
6. Do you hold the licenses and certifications required in North Carolina?

Compare water treatment companies in Raleigh and get more than one quote. Listings are informational, not endorsements. You can also request a free local water report for your area.