Is Omaha, NE Tap Water Safe to Drink?

Where Does Omaha Get Its Water?

Omaha's drinking water is supplied by Metropolitan Utilities District, the sole public water system serving the city. The utility draws from surface water sources in the region, delivering treated water across all 31 ZIP codes monitored in this dataset.

Metropolitan Utilities District operates three major treatment facilities: the Florence Treatment Plant, the Platte South Water Treatment Plant, and the Platte West Water Treatment Plant. Together these plants handle the full treatment and distribution workload for the Omaha service area.

Because one utility and one interconnected treatment system serve the entire city, finished water quality is largely consistent across ZIP codes. The ZIP-level data in EPA records reflects monitoring coverage, not meaningfully different water sources neighborhood to neighborhood.

How Is Omaha Tap Water Treated?

Water at Omaha's treatment plants goes through several steps before it reaches your tap. The process includes coagulation, direct filtration, and pressure sand filtration to remove particles and sediment, along with softening to manage hardness.

Disinfection uses both granular activated carbon contact and free chlorine to kill bacteria and viruses. Free chlorine remains in the distribution system as a residual disinfectant, which helps keep water safe as it travels through miles of pipe to your home.

Granular activated carbon is particularly relevant here because it can also help reduce certain organic compounds and some PFAS chemicals, depending on operating conditions. Whether it fully controls the PFAS concentrations detected in Omaha's water at current levels is not confirmed by the available data.

What's in Omaha Tap Water?

The most significant finding is lithium. EPA testing recorded a peak concentration of 68.7 µg/L, nearly seven times the 10 µg/L health reference level. Lithium was detected across all 31 monitored ZIP codes, making it the city-wide concern. Importantly, EPA has not set an enforceable federal maximum for lithium in drinking water; the 10 µg/L figure is a non-regulatory screening benchmark, not a legal limit.

Four PFAS compounds were also detected across the 31 ZIP codes: PFTrDA, HFPO-DA, 8:2 FTS, and PFBA. Each was measured at or at the reporting limit of 0.005 to 0.007 µg/L. None of these specific compounds exceeded current EPA guidelines, though their presence is worth noting for households with sensitive members.

Lithium in drinking water typically originates from natural geological sources, as it leaches from rock and sediment into surface water and groundwater. PFAS compounds have many industrial and consumer-product origins and are increasingly found in water supplies drawing from rivers in agricultural and industrial regions.

Health Risk Profile for Omaha

The lithium finding is the primary concern. The non-regulatory health reference level is 10 µg/L, and Omaha's water peaked at 68.7 µg/L in recent EPA samples. Because there is no federal enforceable maximum for lithium in drinking water, this does not constitute a legal violation, but EPA established the benchmark because elevated lithium exposure has been linked to potential effects on thyroid function and fetal development.

Pregnant individuals and developing fetuses are the most frequently cited sensitive group for lithium exposure. Infants fed formula mixed with tap water are also at higher potential exposure because formula concentrates the water content. Anyone on lithium-based medication should consult a doctor, since dietary lithium from water could interact with prescribed doses.

For Omaha households concerned about lithium or PFAS, a certified filter is the most practical step. Look for filters certified to NSF/ANSI 58 (reverse osmosis) for lithium reduction, or NSF/ANSI P473 for PFAS reduction. NSF/ANSI is an independent third-party certification program that verifies a filter actually performs as claimed. Check the product label or the NSF website to confirm certification before buying.

The PFAS detected in Omaha's water were at or near the reporting limit and below current EPA guideline values, so their risk contribution appears low based on current data. Science on lower-level PFAS mixtures continues to evolve, and EPA is expected to update standards over time.