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

QUICK SUMMARY:

Overall Rating: Good
Top Contaminants of Concern: Disinfection byproducts (trihalomethanes and haloacetic acids) from chlorinating Lake Erie surface water, and lead leaching from older service lines and premise plumbing
Recommended Filter Type: A certified carbon under-sink filter that covers both chlorine byproducts and lead — see the best under-sink water filters and best water filters for lead removal guides
Water Hardness: Moderately hard to hard — roughly 7 to 8 grains per gallon from Lake Erie source water

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Cleveland Water draws from one of the largest freshwater sources on the continent, treats it at four plants, and tests it nearly 200,000 times a year. The utility has run an orthophosphate corrosion-control program since 1997, and it shows in the numbers: the water that leaves the plant is essentially lead-free, and the system has stayed in compliance with every federal and Ohio EPA standard. If you live in Cleveland or one of the dozens of suburbs the regional system serves, the honest starting point is that your water is treated well and meets the law.

Here’s what nobody tells you, though: “meets the law” and “nothing worth filtering” are not the same sentence. Two contaminants define Cleveland’s profile, and they come from opposite ends of the system. The first is disinfection byproducts — trihalomethanes and haloacetic acids — formed when chlorine reacts with the natural organic matter in Lake Erie water. They run well under federal limits but above the stricter health-based guidelines. The second never comes from the lake at all. Lead enters the water on the last leg of its trip, leaching from the older service lines and household plumbing between the water main and your faucet. Cleveland is still mapping where those lead lines are.

The rest of this report works through each contaminant with the numbers attached, drawn from the Cleveland Water Department’s most recent Water Quality Report and the EPA’s monitoring data.

Where Does Cleveland Get Its Water?

Cleveland Water gets all of its drinking water from Lake Erie. Four intakes pull water from the lake’s Central Basin — some reaching three to five miles offshore to draw from deeper, cleaner water — and send it to four treatment plants: Garrett A. Morgan, Baldwin, Nottingham, and Crown. Together they serve the city and a large regional district of roughly 80 suburban communities across Greater Cleveland, making it one of the larger municipal systems in the country.

That single surface-water source shapes the whole contaminant profile. Lake Erie is a surface water, which means it carries the dissolved organic matter — decayed leaves, algae, runoff — that any lake or river accumulates. When Cleveland Water disinfects that water with chlorine to kill pathogens, the chlorine reacts with that organic matter and forms disinfection byproducts. This is the central trade-off of surface-water treatment: chlorination is what makes the water microbiologically safe, and disinfection byproducts are its unavoidable residue. The treatment process layers coagulation, sedimentation, filtration, fluoridation, and chlorination, and the utility adds orthophosphate to coat the inside of pipes and suppress lead corrosion. The lake water is the reason byproducts exist; the aging pipes between the plant and your home are the reason lead does.

What Contaminants Are in Cleveland Tap Water?

The table below draws on the Cleveland Water Department’s Water Quality Report, the EWG Tap Water Database, and EPA standards. One column needs explaining first. The EPA’s Maximum Contaminant Level (MCL) is the legal limit — the number 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. The gap between the two is where most of the meaningful risk lives, because several federal legal limits have not been updated in decades.

Contaminant	Detected Level	EPA MCL	Health Concern
Total trihalomethanes (TTHMs)	~24 ppb (system average)	80 ppb	Cancer (bladder), fetal development
Haloacetic acids (HAA5)	~14 ppb (system average)	60 ppb	Cancer, reproductive harm
Lead (90th percentile)	~2.1 ppb	15 ppb action level	Neurological harm, especially in children
Chromium (hexavalent)	~0.1 ppb	no separate federal MCL	Carcinogen at higher doses
Nitrate	low, well under limit	10 ppm	Oxygen transport in infants
PFAS	low / non-detect (UCMR5)	4 ppt (PFOA/PFOS)	Below federal limit

Read the disinfection byproducts first, because they are the most consistently elevated regulated contaminants in Cleveland water. Total trihalomethanes average around 24 ppb across the system and haloacetic acids around 14 ppb — comfortably under the 80 ppb and 60 ppb federal ceilings, and lower than many big-city surface-water systems, but still well above the near-zero health-based guideline. These are not violations. They are the ordinary residue of chlorinating lake water, and they are exactly what a point-of-use carbon filter is built to reduce. The reason they top the list is not that the numbers are alarming — they’re moderate — but that they are the contaminant present in every Cleveland tap, every day, by design.

Lead is the contaminant that behaves differently, and it deserves the most attention even though the system average is low. Cleveland Water’s 90th-percentile lead result is about 2.1 ppb, far below the 15 ppb action level, and the water leaving all four plants is lead-free. But that system figure is an average across sampled homes, and lead is not a source-water problem — it forms inside individual pipes. Cleveland is an old city. Lead service lines, lead solder, and brass fixtures remain common in homes built before 1986, and the corrosion-control orthophosphate that suppresses lead leaching is doing real, continuous work to keep that 90th-percentile number low. The city submitted its lead service-line map to Ohio EPA under House Bill 512, the state law requiring utilities to identify where lead lines are. If your home is older, the pipe between the main and your kitchen is the variable the system average cannot capture.

The remaining detections are reassuring. Hexavalent chromium appears at roughly 0.1 ppb — a tiny absolute amount, well below California’s 10 ppb benchmark. Nitrate is low, as you’d expect from a Great Lakes source rather than an agricultural watershed. And PFAS, which Cleveland Water tested for across all four plants under the EPA’s fifth Unregulated Contaminant Monitoring Rule (UCMR5), came back low to non-detect — below the new 4 ppt federal limits. For a city its size, that’s a clean emerging-contaminant result.

The Lead Question in Cleveland

Lead gets its own section because it is the contaminant where the system average is most misleading, and because the fix is specific. Disinfection byproducts are predictable — they’re in everyone’s water at similar levels, and any certified carbon filter handles them. Lead is the opposite: it’s near zero in most homes and meaningfully elevated in a few, and which group you’re in depends entirely on the age of your house and the material of your service line.

The reassuring part is real. Cleveland Water’s orthophosphate corrosion control has held the 90th-percentile result around 2 ppb for years, the treated water is lead-free, and most homes are not at risk. The reason lead still warrants attention is the same reason it warrants attention in every older Northern industrial city: the protective coating inside the pipe is a treatment, not a cure, and disturbances — a service-line repair, a plumbing change, water sitting stagnant overnight — can temporarily raise lead at an individual tap. The population most vulnerable to lead has the smallest margin for error: there is no blood-lead level considered safe for young children, and the American Academy of Pediatrics regards the 15 ppb federal action level as too high to be protective.

If your home was built before 1986, the practical move is twofold. First, check Cleveland Water’s lead service-line map, now public under HB512, to see whether your address is known or likely to have a lead line. Second, if you have or might have a lead line, use a filter certified specifically for lead removal — NSF/ANSI Standard 53 — at the tap you drink and cook from. That is the only step that addresses lead forming inside your own plumbing, which no amount of treatment at the plant can reach. A standard carbon pitcher that isn’t certified for lead does not count; the certification is the whole point.

Cleveland Water Hardness

Cleveland’s water is moderately hard to hard — roughly 7 to 8 grains per gallon, the natural mineral content of Lake Erie water. That puts it in the middle of the range for American cities: harder than the soft mountain-snowmelt supplies of the Pacific Northwest, but far gentler than the limestone-aquifer water of the desert Southwest or Florida.

In practical terms, expect light-to-moderate scale on fixtures, in kettles, and inside water heaters over time, and a modest effect on soap lather — noticeable, but rarely a nuisance worth engineering around. Hardness is not a health concern, and at Cleveland’s levels most households will not find a whole-house water softener worth the cost. If scale is a persistent problem in your home — older water heater, spotty glassware — our hard water guide and solutions explains when a softener earns its keep. For most Cleveland residents, the filtration budget is better aimed at the two contaminants that actually matter here: disinfection byproducts and lead.

Best Water Filters for Cleveland Residents

Cleveland’s profile points to one combined target: a filter that reduces chlorine disinfection byproducts and is certified for lead. That pairing is the whole job here. Because Cleveland has no nitrate problem and a clean PFAS result, you do not need reverse osmosis to cover this city — a certified carbon filter does both jobs at lower cost and higher flow. The deciding factor is your living situation: a homeowner can plumb in an under-sink unit; a renter needs something that requires no plumbing.

The three options below are matched to that profile and chosen on merit. Each carries third-party certification to a specific NSF/ANSI standard from an accredited certifier. A note on labels: there are three legitimate certifiers to the NSF/ANSI standards — NSF International, WQA Gold Seal, and IAPMO R&T — and a product certified by WQA or IAPMO will not appear in NSF International’s own database even though its certification is genuine. Verify the exact model in the certifying body’s database before buying.

Under-Sink: Aquasana Claryum 3-Stage (AQ-5300+)

For a Cleveland homeowner, a carbon-block under-sink system is the most complete single answer, covering both of the city’s contaminants at a dedicated tap with good flow and no wastewater. The Aquasana Claryum 3-Stage is certified by the Water Quality Association — an accredited body that certifies to the NSF/ANSI standards — to Standards 42, 53, and 401. That covers chlorine taste and odor (Standard 42), lead and other heavy metals (Standard 53), and a range of organic compounds including the precursors and byproducts of disinfection (Standard 401). Because Cleveland uses free chlorine rather than chloramine, the chlorine-reduction certification is well matched here, and the lead certification is exactly what an older Cleveland home needs.

The trade-offs are worth knowing. The cartridges are rated for roughly 800 gallons or about six months, and replacements run higher per gallon than a basic carbon filter — budget for the recurring cost. Flow drops gradually as the filters load up, which is your cue to replace them. And to label the certification correctly: this is a WQA certification to the NSF/ANSI standards, not an NSF International listing, so it will not appear in NSF’s own database even though it is genuine.

Buy Direct from Aquasana | Check on Amazon

No-Plumbing / Renters: ProOne Big+ Gravity Filter

Cleveland’s older housing stock means a lot of the people most exposed to lead are renters who can’t install anything under the sink. For them, a gravity countertop filter that needs no plumbing is the right tool — and the ProOne Big+ is the one with the certification to back a lead claim. It is certified by IAPMO R&T to NSF/ANSI Standard 53 for both lead and total PFAS, plus Standard 401 for emerging contaminants. That makes it one of the few no-plumbing filters that can genuinely claim certified lead removal, which is exactly the contaminant a Cleveland renter in a pre-1986 building needs covered.

The limitations are the usual gravity-filter ones. It’s a countertop appliance with a real footprint, you refill the top chamber by hand, and flow is slow — gravity, not water pressure, does the work, so it filters at its own pace rather than on demand. The elements need periodic cleaning and eventual replacement. But for a renter who wants certified lead and byproduct reduction without touching the plumbing, no under-sink system competes. To be precise about the label: this is an IAPMO certification to the NSF/ANSI standards, not an NSF International listing.

Check on Amazon

Budget: ZeroWater 10-Cup Pitcher

If you want certified lead reduction at the lowest entry price — or you’re a renter who wants something even simpler than a gravity unit — a certified pitcher is the budget answer. The ZeroWater pitcher is certified by IAPMO R&T to NSF/ANSI Standards 42 and 53, including lead and PFOA/PFOS, which makes it a genuine certified-lead option rather than a taste-only carbon pitcher. For Cleveland’s combination of chlorine byproducts and tap-formed lead, that certification is the feature that matters.

Be honest with yourself about the trade-off, because it’s the reason a lot of people abandon this pitcher. ZeroWater’s five-stage filter strips out nearly everything, including the dissolved minerals that make water taste like water — the result tastes flat, and some people find it slightly metallic. The filters also exhaust relatively quickly in harder water like Cleveland’s, so the per-gallon cost climbs faster than a basic carbon pitcher. A filter you don’t refill because the water tastes off isn’t protecting anyone, so if flat taste bothers your household, spend up to one of the systems above. To label the certification correctly: this is an IAPMO certification to the NSF/ANSI standards, not an NSF International listing.

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How to Test Your Cleveland Tap Water

Cleveland Water’s reporting is a system-wide picture, measured at four plants and across a sprawling distribution network. It’s the right tool for understanding the source water and the utility’s treatment performance — but lead, the contaminant that matters most here, forms inside your plumbing, and a system average measured at other people’s homes can’t tell you what’s happening at your tap.

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 above. If your home was built before 1986, a lead-specific test is the single most valuable thing you can do — it’s the only way to know whether your service line and plumbing are leaching, regardless of the low system average. 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 Cleveland tap water safe to drink?

Cleveland tap water meets all federal and Ohio EPA drinking water standards, and the utility tests it nearly 200,000 times a year. The two contaminants worth understanding are disinfection byproducts (trihalomethanes around 24 ppb and haloacetic acids around 14 ppb — both well under legal limits but above health guidelines) from chlorinating Lake Erie water, and lead, which forms in older service lines and household plumbing rather than in the source water. For most households the water is acceptable to drink as is; a filter certified to NSF/ANSI 53 reduces both the byproducts and any tap-formed lead, which matters most in homes built before 1986.

Does Cleveland water have lead?

The water leaving Cleveland’s four treatment plants is lead-free, and the system 90th-percentile result is about 2.1 ppb — far below the 15 ppb federal action level — thanks to an orthophosphate corrosion-control program in place since 1997. But lead is not a source-water problem; it leaches from lead service lines, solder, and brass fixtures in older homes. Cleveland has mapped its lead service lines under Ohio House Bill 512. If your home predates 1986, check that map and use a filter certified to NSF/ANSI 53 for lead at the tap, since no treatment at the plant can address lead forming inside your own plumbing.

Does Cleveland water have PFAS?

Cleveland Water tested for PFAS across all four treatment plants under the EPA’s fifth Unregulated Contaminant Monitoring Rule (UCMR5) and reported low to non-detect results — below the new 4 ppt federal limits for PFOA and PFOS. Drawing from deep, offshore Lake Erie intakes rather than a contaminated groundwater source works in the city’s favor here. PFAS is not currently a headline concern for Cleveland, though if you want a margin of safety, the lead-certified filters recommended above (ProOne Big+ and ZeroWater) are also certified for PFOA/PFOS.

How hard is Cleveland water?

Cleveland water is moderately hard to hard — roughly 7 to 8 grains per gallon, the natural mineral content of Lake Erie. At that level you can expect light-to-moderate scale on fixtures and in water heaters, and a modest effect on soap lather. Hardness is not a health concern, and most Cleveland households do not need a whole-house water softener. The more pressing filtration targets are disinfection byproducts and, for older homes, lead.

Do I need a water filter in Cleveland?

It depends on your home. If your house was built before 1986 — common across Cleveland and its older suburbs — a filter certified to NSF/ANSI 53 for lead is worth it, because lead can form in your own service line and plumbing regardless of the low system average. The same certified carbon filters also reduce the chlorine disinfection byproducts present in every Cleveland tap. You do not need reverse osmosis here: the city has no nitrate problem and a clean PFAS result, so a certified carbon under-sink filter (homeowners) or a certified gravity unit or pitcher (renters) covers Cleveland’s profile.

Sources Cited

Cleveland Water Department, Water Quality Report (Consumer Confidence Report), 2025: https://www.clevelandwater.com/your-water/water-quality
Cleveland Water Department — source water (Lake Erie intakes), four-plant treatment process, orthophosphate corrosion control, lead service-line mapping under Ohio HB512, and UCMR5 PFAS monitoring
US EPA, Safe Drinking Water Information System (SDWIS) — Cleveland Public Water System (PWSID OH1801212)
US EPA, National Primary Drinking Water Regulations — Stage 2 Disinfectants and Disinfection Byproducts Rule (TTHM 80 ppb, HAA5 60 ppb) and Lead and Copper Rule (15 ppb action level)
US EPA, Fifth Unregulated Contaminant Monitoring Rule (UCMR5) — PFAS results
EWG Tap Water Database — Cleveland Public Water System (OH1801212)
USGS, Water Hardness classification scale
NSF International certified product listings (info.nsf.org), WQA certified-product listings (find.wqa.org), and IAPMO R&T product database (pld.iapmo.org)

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