Is Wichita, KS Tap Water Safe to Drink?

Where Does Wichita Get Its Water?

Wichita's drinking water is supplied by seven water systems serving the metro area. The primary utility is the City of Wichita, supported by smaller surrounding systems including the City of Bel Aire, the City of Haysville, the City of Park City, Sedgwick County Rural Water District 2, Sedgwick County Rural Water District 3, and Butler County Rural Water District 5.

The City of Wichita operates a main treatment plant that processes water before it is distributed through the system. Interconnections with neighboring communities allow water sharing across the metro, which is reflected in the multiple system connections documented in EPA records.

The area's water supply draws on regional sources, and treated water moves through a network of storage towers and interconnections to reach homes across Sedgwick County and surrounding areas.

How Is Wichita Tap Water Treated?

Wichita's water goes through several treatment steps before reaching your tap. The process includes filtration and chemical treatment stages designed to remove particles and reduce contaminants, along with softening processes that address hardness minerals common in Kansas groundwater sources.

Disinfection uses a combination of methods including ozone and free chlorine to kill bacteria and viruses. Ozone is applied as an initial disinfection stage, and chlorine is added to maintain protection as water travels through the distribution pipes to your home.

The treatment system is designed to meet federal drinking water standards for regulated contaminants. Some contaminants, like lithium, do not have an enforceable federal limit, so treatment decisions for those are guided by non-regulatory health benchmarks rather than legal requirements.

What's in Wichita Tap Water?

The most notable finding in Wichita's water is lithium. EPA testing found lithium at levels up to 22.7 micrograms per liter (µg/L), more than double EPA's health reference level of 10 µg/L. This elevated reading was detected across all 26 ZIP codes in the area. Importantly, there is no enforceable federal maximum for lithium in drinking water; the 10 µg/L figure is a non-regulatory screening benchmark.

Several PFAS compounds were also detected, including PFTrDA, HFPO-DA, PFBA, and 6:2 FTS. The highest measured values for each were at or near the reporting detection threshold of 0.005 to 0.007 µg/L. None of these detections exceeded current applicable guidelines, and all 26 ZIPs showed detections, consistent with the broad screening that recent EPA monitoring has undertaken nationwide.

Lithium occurs naturally in some groundwater and surface water sources, particularly in parts of the central United States. PFAS compounds are synthetic chemicals that have been widely distributed in the environment and can enter water supplies through multiple pathways. Their presence at low levels in municipal water systems has become a common finding in recent EPA testing programs.

Health Risk Profile for Wichita

Lithium is the primary concern in Wichita's tap water. The peak detected level of 22.7 µg/L is more than twice EPA's health reference level of 10 µg/L. This reference level is a non-regulatory screening benchmark, not an enforceable federal standard, meaning the water is not in legal violation. However, the benchmark exists because elevated lithium exposure over time has been associated with potential effects on the kidneys and thyroid.

Pregnant individuals, infants, and people with kidney or thyroid conditions may be at greater risk from elevated lithium exposure and should consult a healthcare provider about whether additional precautions are appropriate. The PFAS compounds detected are at very low levels and currently fall within applicable guidelines, but ongoing science continues to evaluate health effects of PFAS mixtures.

For households concerned about lithium or PFAS, a reverse osmosis filter certified to NSF/ANSI 58 is the most effective option. NSF/ANSI certification is an independent third-party label that verifies a filter actually removes what it claims to remove; look for it on the product box or the manufacturer's website. For PFAS specifically, also look for NSF/ANSI P473 certification.

Standard pitcher filters certified only to NSF/ANSI 42 improve taste and reduce chlorine but are not designed to remove lithium or PFAS. If cost or installation is a barrier, a countertop or under-sink reverse osmosis unit certified to NSF/ANSI 58 is the next best option for addressing both categories of concern found in Wichita's water.