Is Peoria Tap Water Safe to Drink in 2025?

If you have been wondering whether Peoria tap water is safe to drink, you are not alone. Residents across Peoria, East Peoria, and surrounding Tazewell County communities have been raising the same question — and the data from public water quality reports gives them good reason to ask. Peoria Water Filtration compiled the key facts here so you can make an informed decision about what your household is drinking.

The short answer: Peoria's tap water meets many federal legal standards, but "legal" and "safe" are not the same thing. Multiple contaminants detected in local water supplies exceed health-based guidelines set by independent researchers and public health groups, even when those levels fall below EPA regulatory thresholds.

What the EWG Report Says About Peoria Tap Water Quality

The Environmental Working Group (EWG) operates an independent tap water quality database that evaluates municipal water systems against health-based guidelines — limits derived from current science rather than outdated regulatory thresholds. Their assessment of Peoria's water supply gave the city a D+ overall grade.

That grade reflects a gap between what is legally permitted and what health researchers consider safe for long-term consumption. The EWG grades systems based on how many contaminants exceed health guidelines, not just legal limits — and by that measure, Peoria's water falls in the bottom tier.

East Peoria fares even worse in the EWG data. The East Peoria water system has 14 contaminants detected above health-based guidelines, along with 73 documented violations. For a community of this size, that violation count is significant and warrants close attention from residents in East Peoria and nearby areas like Morton and Washington.

Key Contaminants Found in Peoria Water

Understanding what is in your water starts with knowing which contaminants are most commonly detected in the Peoria area supply. The following are the primary concerns documented in public water quality reports:

Lead. Lead contamination is the most urgent issue for Peoria residents right now. Illinois American Water issued a lead contamination advisory specifically for Peoria District customers in 2025. Lead enters drinking water primarily through older pipes, service lines, and household plumbing fixtures — not from the water source itself. This means treatment at the tap, such as a certified lead-reducing filter, is the most effective solution. There is no safe level of lead exposure for children, and long-term exposure in adults is linked to cardiovascular and kidney problems.

PFAS (Per- and Polyfluoroalkyl Substances). Known as "forever chemicals" because they do not break down in the environment or the human body, PFAS compounds have been detected in water systems across Illinois. These chemicals have been used in industrial processes, firefighting foam, and consumer products for decades. Long-term PFAS exposure is associated with immune system disruption, thyroid disorders, and certain cancers. Conventional water treatment does not fully remove PFAS; reverse osmosis filtration and activated carbon block filters are among the more effective reduction methods.

Chlorine and Disinfection Byproducts. Illinois American Water uses chlorine and chloramine to disinfect the municipal supply — a necessary public health measure that eliminates bacteria and viruses. However, when chlorine reacts with naturally occurring organic matter in source water, it creates disinfection byproducts (DBPs) such as trihalomethanes (THMs) and haloacetic acids (HAAs). These compounds are detected at varying levels in Peoria area water and have been linked to increased cancer risk and reproductive health concerns with long-term exposure.

Water Hardness. While not a health contaminant, Peoria's high mineral content — calcium and magnesium dissolved from Central Illinois limestone geology — affects water quality in significant ways. Hard water damages appliances, leaves scale deposits, irritates skin and hair, and reduces the effectiveness of soaps and detergents. Read more about this in our guide to hard water problems in Peoria, IL.

Legal Compliance vs. Actual Safety: Understanding the Gap

One of the most common misunderstandings about tap water is equating legal compliance with safety. The EPA's Maximum Contaminant Levels (MCLs) — the regulatory limits that water utilities must meet — were established decades ago and have not been updated to reflect the latest public health research in many cases.

The EWG's health-based guidelines are set at levels where scientific research finds no meaningful increased risk of adverse health effects. In many cases, the EWG limit for a given contaminant is far lower than the EPA's legal limit. A water system can fully comply with all federal regulations and still deliver water that exceeds the health-based limits for multiple contaminants.

This is not a hypothetical concern — it is the situation in Peoria. The D+ grade from EWG reflects a system that meets legal standards while still delivering water that exceeds independent health benchmarks. For families with young children, pregnant women, or immunocompromised individuals, the distinction matters.

What Peoria Residents Can Do Right Now

Knowing your water has problems is only useful if you take action. Here is a practical approach for Peoria homeowners:

• Get a certified in-home water test. A professional test measures the actual levels of lead, PFAS, hardness, chlorine byproducts, and other contaminants at your specific tap. Results vary by home age, pipe materials, and location within the distribution system.
• Install a certified lead-reducing filter. If you are in the Illinois American Water Peoria District, a NSF/ANSI 53-certified filter that is rated for lead reduction should be installed at your primary drinking water tap immediately.
• Consider a whole-house filtration system. Point-of-entry systems treat all water entering your home, protecting you from contaminants in the shower, laundry, and cooking water as well as drinking water. Learn more in our complete guide to whole-house water filtration in Illinois.
• Run your tap before drinking. If you have older plumbing, run cold water for 30 to 60 seconds before drawing water for drinking or cooking. This flushes standing water that has been in contact with pipes and fixtures.
• Do not use hot tap water for drinking or cooking. Hot water dissolves lead and other contaminants from pipes more readily than cold water.

The most reliable solution for Peoria families is a multi-stage filtration system designed to address the specific contaminants documented in local water. Peoria Water Filtration provides free in-home water tests to identify exactly what is in your water before recommending a system.