Gary, Indiana was purpose-built by U.S. Steel in 1906 as an industrial city. For most of the 20th century, it was one of the most productive steel cities in the world, employing tens of thousands and filling Lake Michigan’s southern shore with blast furnaces, coke ovens, and slag heaps. Today, Gary is a city in economic distress — population has fallen from a peak of over 175,000 to around 70,000 — and the environmental legacy of steel production is one of the most consequential things it’s inherited from its industrial past. Water quality is central to that story.
Steel Industry Environmental Legacy
The steel plants that defined Gary discharged for decades into the Grand Calumet River and the Indiana Harbor Ship Canal, two waterways that run through the industrial corridor between Gary and East Chicago. These waterways were subjected to some of the most intensive industrial discharges in the Great Lakes region — heavy metals, polycyclic aromatic hydrocarbons (PAHs), cyanide compounds, ammonia, and other byproducts of coke production and steelmaking.
The Grand Calumet River is an EPA Superfund site. The Indiana Harbor and Ship Canal, which borders East Chicago, is also an area of concern under the Great Lakes Water Quality Agreement. Sediment contamination in these waterways remains a significant environmental problem. Fish consumption advisories for the Grand Calumet and Indiana Harbor have been in place for years, warning residents against eating most species of fish from these waterways due to PCBs, lead, and other contaminants in fish tissue. [NEEDS VERIFICATION: current IDEM fish consumption advisory status for Grand Calumet]
Airborne emissions from the steel mills historically contributed lead and other heavy metals to soil throughout the Gary area. Decades of industrial air deposition have elevated metal concentrations in soil, particularly near the plants and along prevailing wind corridors. This soil contamination matters for children who play outdoors and for urban gardening, but it also affects the groundwater beneath the most contaminated areas.
Gary’s Drinking Water System and Lead
Gary’s drinking water comes from Lake Michigan, treated at the Gary Sanitary District’s water treatment facilities. Lake Michigan is a high-quality source water, particularly compared to the polluted local rivers. The treatment process involves conventional methods — coagulation, sedimentation, filtration, and disinfection. This source water advantage matters.
The more acute concern in Gary is lead in the distribution system and in household plumbing. Gary, like most older industrial cities, has a legacy infrastructure with lead service lines connecting many homes — particularly those built before 1986. Lead service lines are pipes running from the water main to the household connection, and when water is corrosive or when lines are disturbed, they can leach lead into drinking water.
Lead has no safe level of exposure for children. Even low-level exposure is associated with developmental impacts, reduced IQ, behavioral problems, and other serious health effects. Gary’s demographics — a predominantly Black city with high poverty rates and aging housing stock — mean that lead exposure risks fall disproportionately on children who already face other health and developmental challenges.
The Indiana Finance Authority and state programs have provided some assistance for lead service line replacement in Gary, but the scale of the problem and the city’s limited fiscal capacity have made comprehensive replacement a long-term project. Indiana’s lead service line replacement requirements, updated in line with EPA’s revised Lead and Copper Rule, create a timeline, but implementation depends on funding and utility capacity.
What Testing Has Found
Under the Lead and Copper Rule, Gary’s water system conducts lead and copper testing at the tap in high-risk homes. Results have shown detections that, in some years and at some sample sites, have exceeded the EPA’s action level of 15 parts per billion. When action levels are exceeded, utilities must take specific steps including public notification, corrosion control optimization, and accelerated service line replacement. [NEEDS VERIFICATION: most recent Gary lead testing results and action level compliance status]
The utility has implemented corrosion control treatment — adjusting water chemistry to reduce the tendency of water to leach lead from pipes. This is effective but not a complete solution, particularly in homes with heavily leaded plumbing or old lead service lines.
Beyond lead, Gary’s CCR data has shown other contaminants consistent with a Lake Michigan surface water source: some disinfection byproducts from treatment, and trace levels of various industrial compounds that reach even the open lake from the regional industrial complex. Radium has been detected at very low levels, as is common in Great Lakes utilities drawing from deeper water. [NEEDS VERIFICATION: current radium levels in Gary finished water]
Environmental Justice Context
Gary is one of the most prominent examples of environmental justice concerns in the Great Lakes region. The concentration of industrial pollution, the legacy of redlining and disinvestment, and the resulting health burden on a predominantly Black community have been documented by researchers, journalists, and advocacy groups for decades.
Organizations including the Hoosier Environmental Council have tracked Gary’s environmental health landscape. The EPA’s Environmental Justice mapping tools (EJSCREEN) show Gary ranking in high percentiles for environmental burden indicators including air quality, proximity to hazardous waste facilities, and water quality concerns.
The legacy of U.S. Steel’s corporate decisions — including where to build industrial facilities, how to manage waste, and what protections to provide to the surrounding community — has been studied as a textbook case in environmental justice literature.
What Residents Can Do
- Test your tap for lead. This is the most important immediate action. Contact Gary’s water utility for information on lead testing assistance, or hire an independent certified laboratory. Testing is especially important in homes built before 1986.
- Use a certified lead filter. While testing is arranged, run water through an NSF/ANSI 53-certified filter rated for lead removal before drinking or cooking. Pitchers like ZeroWater and Brita have certified models, but under-sink carbon block filters are more reliable.
- Run cold water and flush the tap. Before drinking in the morning or after water has sat in pipes, flush the tap for 30 seconds to 2 minutes. Use cold water, not hot — hot water draws more lead from pipes.
- Check fish consumption advisories. If you fish in the Grand Calumet River, Indiana Harbor, or other local waterways, consult Indiana Department of Environmental Management (IDEM) advisories before eating your catch.
- Read the CCR. The Consumer Confidence Report will tell you what Gary’s system has detected and at what levels. Pay particular attention to lead test results and whether any action level exceedances occurred.
Water Treatment Options
For lead, the most effective point-of-use options are:
- Reverse osmosis systems: Highly effective at removing lead and many other contaminants.
- NSF/ANSI 53-certified carbon block filters: Must be specifically certified for lead reduction. Not all carbon filters are effective for lead.
For disinfection byproducts, activated carbon filtration handles TTHMs and HAAs well.
Gary’s challenges are real and they’re tied to deep structural issues — decades of industrial pollution, economic disinvestment, and aging infrastructure — that individual water filters can’t fully solve. But for residents living with these conditions now, point-of-use treatment is a meaningful protection while the larger work continues.
If you are concerned about your water quality, a certified water treatment professional can test your water and advise on solutions.