Kansas City
MO

Is Kansas City, MO Tap Water Safe to Drink?

Kansas City, MO tap water has a qualified safety concern. Lithium has been detected above EPA's drinking water guideline in all 54 ZIP codes covered by recent EPA testing, while several PFAS compounds were found at low levels that remain below current guidelines. The water meets federal rules in most respects, but the lithium readings are worth paying attention to, especially for sensitive groups.

9Water systems
54ZIP codes
100%ZIPs above EPA guideline
Metro areaKansas City, MO-KS
Latest data2025-01-13

Where Does Kansas City Get Its Water?

Kansas City, MO is served by nine public water systems that together cover all 54 ZIP codes in the metro area. The primary provider is Kansas City Public Water, alongside North Kansas City Public Water, Gladstone Public Water, Raytown Water Company, and several county-level districts including Clay County Public Water Supply District 6, Jackson County Public Water Supply District 2, Platte County Consolidated Public Water Supply District 1, and Platte County Public Water Supply District 4.

A ninth system, Thomas Hill Public Water Supply District 1, also appears in EPA records for this area. Because the aggregate data does not break down source water type by system, the specific rivers, reservoirs, or aquifers feeding each utility cannot be confirmed from available data alone.

Each of these utilities operates under Missouri state oversight and is required to monitor and report water quality to the EPA. The ZIP codes in the data are a reporting and mapping convenience; finished tap water quality differences between neighborhoods are not documented in the underlying data.

How Is Kansas City Tap Water Treated?

The utilities serving Kansas City collectively use a wide range of treatment steps. These include coagulation, direct filtration, slow sand filtration, granular activated carbon, powdered activated carbon, and adsorption processes. Additional steps include air stripping, disinfection filtration, and pressure sand filtration, which together address sediment, organic compounds, and other contaminants before water reaches your tap.

Disinfection across the systems includes free chlorine, chloramines, and in some cases ozone and ultraviolet light. Free chlorine and chloramines are the most common approaches and are used to kill bacteria and viruses throughout the distribution system, ensuring water stays safe as it travels through pipes to your home.

Some systems also apply no disinfection at certain points or use embedded membrane processes, reflecting the varied infrastructure across nine separate utilities. The treatment codes in EPA records indicate that groundwater-dependent sources and infiltration methods are also part of the regional supply picture.

What's in Kansas City Tap Water?

The standout finding in recent EPA testing is lithium. The highest detected level was 54 micrograms per liter, which is more than five times the EPA drinking water guideline of 10 micrograms per liter. All 54 ZIP codes in the dataset recorded detections, and all 54 showed levels above that guideline. The most recent sample was collected in October 2024.

Several PFAS compounds were also detected across all 54 ZIP codes. PFBA reached a peak of 0.0073 micrograms per liter, while PFTrDA, HFPO-DA, and 6:2 FTS were each detected at or near their reporting limits. None of these PFAS readings exceeded current EPA guidelines, and all values remain low relative to established thresholds.

Lithium in drinking water typically comes from natural geological sources, as it occurs in rock and soil that surface water or groundwater passes through. PFAS compounds are synthetic chemicals that can enter water supplies from industrial sites, firefighting foam, and consumer product runoff. The data does not identify the specific sources for Kansas City's readings.

ContaminantPeak detectedEPA guidelineZIPs detectedStatus
lithium 54 µg/L 10 µg/L 54 ZIPs Above guideline
PFBA 0.0073 µg/L — 4 ZIPs Within guideline
PFTrDA 0.007 µg/L — 0 ZIPs Within guideline
HFPO-DA 0.005 µg/L — 0 ZIPs Within guideline
6:2 FTS 0.005 µg/L — 0 ZIPs Within guideline

Health Risk Profile for Kansas City

Lithium is the primary concern here. The EPA has set a drinking water guideline of 10 micrograms per liter, and Kansas City's peak detected level of 54 micrograms per liter is well above that benchmark. It is important to note that this guideline is a non-enforceable health reference value, not a federal maximum contaminant level, so utilities are not legally required to reduce lithium below it. That said, the gap between the measured level and the guideline is significant.

Infants, pregnant individuals, and people with kidney conditions or thyroid disorders are generally considered more sensitive to lithium exposure. Lithium at elevated concentrations has been studied in connection with thyroid and kidney effects, and health authorities recommend that these groups pay closer attention to their exposure. If you fall into one of these categories, consulting a healthcare provider about your tap water is a reasonable step.

A filter certified to NSF/ANSI 58 (reverse osmosis) is the most effective option for reducing both lithium and PFAS compounds. NSF/ANSI is an independent third-party certification that confirms a product actually removes what it claims to remove; look for the NSF mark on the filter packaging. For the PFAS compounds detected here, a filter also certified to NSF/ANSI P473 adds an additional layer of assurance targeting PFOA and PFOS and related chemicals.

The PFAS levels detected in Kansas City tap water are currently below EPA guidelines, so they represent a lower immediate concern than the lithium readings. However, science on long-term low-level PFAS exposure is still developing, and some researchers advocate for precautionary filtration even at sub-guideline levels. The lithium finding alone is a practical reason to consider point-of-use filtration.

Best Broad-Spectrum Filters for This Water Profile

This city profile includes PFAS detections, chlorine disinfection, and other dissolved contaminants. Reverse osmosis (RO) systems certified under NSF/ANSI 58 provide broad reduction coverage; for PFAS specifically, confirm NSF/ANSI P473 or equivalent PFAS reduction certification.

Waterdrop G3P600 Reverse Osmosis System
Under-sink RO system

8-stage tankless RO system certified to NSF/ANSI 58, reduces 1,000+ contaminants including PFAS, lead, arsenic, fluoride, and nitrates.

See recommendations matched to your exact address: choose your ZIP code below.

Frequently Asked Questions about Kansas City Tap Water

Is Kansas City tap water safe to drink?

Kansas City tap water meets most federal standards, but lithium has been detected at levels above EPA's non-enforceable drinking water guideline of 10 micrograms per liter, with a peak of 54 micrograms per liter recorded across all monitored ZIP codes. PFAS compounds were detected but remain below current guidelines. For most healthy adults the risk is low, but sensitive groups should take extra precautions.

What contaminants are in Kansas City tap water?

Recent EPA testing found lithium at a peak of 54 micrograms per liter, above the 10 micrograms per liter guideline, in all 54 monitored ZIP codes. PFAS compounds including PFBA (peak 0.0073 micrograms per liter), PFTrDA, HFPO-DA, and 6:2 FTS were also detected across all ZIP codes, but all four remain at or below current EPA guideline levels.

Where does Kansas City get its drinking water?

Kansas City, MO is served by nine public water systems. The largest is Kansas City Public Water, with additional service from North Kansas City Public Water, Gladstone Public Water, Raytown Water Company, and several county water districts in Clay, Jackson, and Platte counties. The available data does not specify the exact rivers, reservoirs, or aquifers each system draws from.

Do I need a water filter in Kansas City?

Given the lithium levels above EPA's guideline and the presence of PFAS compounds, a point-of-use filter is worth considering. A reverse osmosis system certified to NSF/ANSI 58 is effective against both lithium and PFAS. For PFAS specifically, also look for NSF/ANSI P473 certification. NSF/ANSI is an independent third-party label confirming the filter performs as claimed.

How often is Kansas City tap water tested?

The water systems serving Kansas City are monitored on a schedule set by EPA and Missouri regulators. The data shown here reflects EPA testing with the most recent samples collected as recently as January 2025 for PFAS and October 2024 for lithium. Utilities are also required to publish annual Consumer Confidence Reports detailing their own monitoring results.

What is the best water filter for Kansas City?

A reverse osmosis filter certified to NSF/ANSI 58 is the best match for Kansas City's contaminant profile, as it effectively reduces lithium and PFAS compounds. Adding NSF/ANSI P473 certification covers PFAS more specifically. For chlorine taste and odor, a filter with NSF/ANSI 42 certification handles that as well. Many under-sink or countertop reverse osmosis units carry multiple certifications.

Tap water reports by ZIP in Kansas City

Water utilities serving Kansas City, MO

Service area boundaries are approximate and based on state filings or modeled estimates. Contact your utility to confirm exact service at a specific address.

Modeled boundaries are shown with a dashed outline.

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