Pittsburgh's water quality story is more complicated than most cities: genuinely good news on one front, ongoing concern on another, and a third issue most residents don't know about.
Here's an honest look at what's in Pittsburgh's water right now.
The Good News: Lead Is at a 20-Year Low
Pittsburgh had a serious lead problem. For years, the city struggled with lead levels near and occasionally above federal action thresholds — a legacy of aging infrastructure and the massive stock of lead service lines installed when Pittsburgh was a steel and manufacturing center.
That's changed substantially. The 2024 Consumer Confidence Report from the Pittsburgh Water and Sewer Authority (PWSA) shows a 90th percentile lead level of 3.6 parts per billion (ppb) — well below the EPA action level of 15 ppb, and the lowest level in at least 20 years.
The improvement comes from two things the PWSA has done aggressively:
- Orthophosphate treatment: A food-grade additive applied at the treatment plant that creates a protective mineral coating inside pipe walls, reducing lead leaching.
- Lead service line replacement: The PWSA has replaced over 12,000 public lead service lines since 2016, at no cost to homeowners, with a target of full replacement by 2027.
The important caveat: Federal standards measure lead at the 90th percentile across a sample of high-risk taps — not at every tap in the city. If your home was built before 1986 and hasn't had its service line replaced, your personal risk may be higher than the citywide average. The PWSA offers free lead testing kits and, if your test comes back elevated, free filter pitchers.
→ Enter your ZIP at PureCity to see if your neighborhood is flagged as higher risk for lead based on housing age and infrastructure data.
The Concerning Issue: Chromium-6
Here's the water quality problem that doesn't get as much coverage as lead in Pittsburgh but warrants attention.
Pittsburgh's water has tested positive for hexavalent chromium (chromium-6) at approximately 535 parts per trillion (ppt). For context: the Environmental Working Group's health guideline for chromium-6 is 20 ppt. That means Pittsburgh's detected level is roughly 27 times higher than the EWG health threshold.
Why isn't this being regulated? There is currently no federal Maximum Contaminant Level (MCL) for chromium-6 specifically. The EPA regulates total chromium at 100 parts per billion (100,000 ppt) — a standard set decades ago that doesn't distinguish between trivalent chromium (less harmful) and hexavalent chromium (the carcinogenic form made famous by the Erin Brockovich case). California has its own stricter standard of 10 ppb for total chromium, but federal law hasn't been updated.
Pittsburgh's levels are well below the federal total chromium limit. But scientific consensus has shifted considerably on what level of chromium-6 represents an acceptable health risk — California set a chromium-6-specific standard of 10 ppt in 2024, far stricter than what Pittsburgh's water currently meets.
Chromium-6 is a known human carcinogen. Long-term exposure, particularly in drinking water, has been associated with increased risk of gastrointestinal and bladder cancers. The risk at 535 ppt is not zero, but it's also not the same risk as the levels seen in the Hinkley, California groundwater at the center of the Brockovich case (which reached tens of thousands of ppt).
The bottom line on chromium-6: Pittsburgh's water is legally compliant. But if you're pregnant, have young children, or simply want to minimize your risk given what the science currently suggests, a reverse osmosis filter at your kitchen tap will reduce chromium-6 to near-undetectable levels.
Disinfection Byproducts
Pittsburgh's source water — the Allegheny River — carries natural organic matter, and when that organic matter reacts with chlorine during treatment, it produces disinfection byproducts (DBPs): total trihalomethanes (TTHMs), haloacetic acids (HAA5s), chloroform, and bromodichloromethane.
These compounds are regulated, and Pittsburgh's water currently meets federal limits for all of them. But the EWG considers the federal limits for these compounds to be insufficiently protective. TTHMs have been associated with increased bladder cancer risk with long-term exposure; some haloacetic acids are classified as probable human carcinogens.
The levels in Pittsburgh are not unusual for a system treating river water with chlorine — this is a common tradeoff, as chlorine disinfection is essential for preventing microbial contamination. It's not a crisis, but it's a real reason to filter your drinking and cooking water.
Standard activated carbon filters (including pitchers like Brita Elite and faucet-mount filters) are effective at reducing chlorine and most disinfection byproducts. Reverse osmosis removes them comprehensively.
What Filter to Use in Pittsburgh
Given the combination of potential lead risk in older homes, chromium-6 above health guidelines, and elevated disinfection byproducts, a point-of-use filter for drinking and cooking water is a reasonable investment for most Pittsburgh residents.
For most households:
- Clearly Filtered Pitcher (~$90) — independently certified to remove lead, chromium, PFAS, and 360+ contaminants; the most capable pitcher filter available without any installation
- Brita Everyday Elite (~$41) — certified for lead and chlorine/taste; a solid budget option if chromium-6 is your only additional concern (note: the Elite/blue filter, not the Standard/white filter)
For maximum protection (chromium-6, lead, DBPs, everything):
- APEC ROES-50 Under-Sink RO (~$215) — NSF 58 certified, removes chromium, lead, and all disinfection byproducts
- Bluevua RO100ROPOT-LITE Countertop RO (~$299) — for renters or anyone who doesn't want to drill; same RO performance without installation
For renters or apartments in pre-1986 buildings where lead pipes are still a risk in the internal building plumbing, a pitcher with NSF/ANSI 53 lead certification (at minimum) is strongly recommended. The PWSA also offers free filter pitchers to residents who test positive for lead — request one here.
Does Your Building Have Lead Pipes?
The PWSA's service line replacement program has focused on the public portion of lines — from the water main to your property line. The private portion, from your property line to your tap (including internal building plumbing), is your responsibility.
If your home or building was built before 1986:
- There's a meaningful chance your internal plumbing contains lead solder, brass fixtures with lead content, or lead supply lines.
- Orthophosphate treatment reduces (but doesn't eliminate) lead leaching from these internal sources.
- The PWSA offers free water testing at your tap — request a test kit at pgh2o.com.
Newer buildings (post-1986) and buildings that have been fully replumbed are substantially lower risk. If you're uncertain, test.
The Big Picture
Pittsburgh's water is genuinely improving and meets all current federal standards. The lead story is actually a good-news story — the city did the hard work of infrastructure investment and aggressive replacement, and it shows in the data.
The chromium-6 and disinfection byproduct situation is worth taking seriously — not because there's an emergency, but because the science has moved ahead of the regulations. A $40–$90 filter pitcher is a cheap hedge against long-term cumulative exposure.
If you live in an older building and haven't tested your tap, that's the most important first step. Get the free test kit from PWSA, and go from there.
Related Articles
- Does Your Water Filter Actually Remove Lead? What Brita Won't Tell You
- PFAS in Drinking Water: What It Is, Where It's Found, and How to Filter It
- Best Water Filter for Renters: No Drilling, No Landlord Drama
Sources: Pittsburgh Water and Sewer Authority Consumer Confidence Report 2024 · EWG Tap Water Database: Pittsburgh · PWSA Lead Service Line Replacement Program · EPA Chromium in Drinking Water · California Chromium-6 Standard, 2024 · NSF Certified Products Database