EnerSys Energy Products recorded 227 lead emission control failures at a single Missouri factory over three years, then reported zero of them to the government.

Three Factories. 283 Hidden Failures. Three Years of Silence.

EnerSys Energy Products manufactures lead acid batteries at three Missouri plants. Lead acid battery manufacturing is one of the most regulated industrial processes in the country because it involves lead, a heavy metal with zero safe exposure level for children, and one that causes irreversible neurological damage at any detectable blood concentration.

Federal law requires these plants to use baghouses: sealed fabric filter systems that trap lead particles before they escape into the air. Operators must monitor the pressure drop across these filters every single day, and they must file semi-annual reports with the EPA disclosing every time the filter operates outside its safe range and what they did to fix it.

EnerSys monitored the filters. They recorded the failures. Then they filed reports that left those failures out entirely.

The Warrensburg Plant: The Worst of the Three

The Warrensburg facility, located at 617 North Ridgeview Drive, recorded the most severe compliance breakdown. From January 1, 2020 to December 31, 2022, EnerSys documented its lead emission filters operating outside safe pressure ranges on at least 227 separate occasions. These were not glitches in a spreadsheet. Each instance represents a moment when the equipment designed to keep lead out of the air was not functioning as required by law.

Despite this, the company filed four consecutive semi-annual monitoring reports covering that entire three-year window without disclosing a single one of those 227 incidents or the corrective actions taken. Four reports. Three years. Two hundred and twenty-seven buried failures.

Springfield Plants: The Pattern Repeats

The two Springfield plants followed the same playbook over a shorter window. At 4000 East Continental Way (Springfield No. 1), EnerSys recorded at least 46 out-of-range pressure events between August 18, 2022 and December 31, 2022, and reported none of them. At 1320 North Alliance Avenue (Springfield No. 2), there were at least 10 additional unreported incidents during the same period.

All three facilities used the same control technology. All three facilities produced the same type of paperwork failures. This was a corporate-wide pattern, across every Missouri facility EnerSys operated.

The Non-Financial Ledger: What the Fine Doesn’t Cover

A $430,500 fine (roughly what a family of four needs to live for 8 to 10 years in most Missouri cities) gets paid once, and then it’s over for EnerSys. What doesn’t end is the exposure. Lead, once it enters a community, does not leave. It settles in soil. It accumulates in the bodies of children who play outside. It lodges in the bloodstreams of workers who spend eight hours a day inside these facilities. There is no settlement check that reverses lead poisoning.

The communities surrounding these three Missouri plants never got a warning. Warrensburg is a city of roughly 20,000 people. The two Springfield plants sit in a metro area of over 400,000. For up to three years, from January 2020 through December 2022, any time a baghouse at the Warrensburg plant failed one of its 227 documented pressure thresholds, lead-contaminated air had a pathway to move through or past the filter and into the surrounding environment. EnerSys knew, because they recorded it. The neighborhood did not know, because EnerSys told regulators nothing.

The workers inside these facilities deserve special attention in this ledger. Lead acid battery manufacturing plants are classified as area sources of hazardous air pollutants precisely because the lead exposure risk is significant enough to require federal regulation. Workers operating inside these plants during periods of filter failure faced the most direct and concentrated exposure. Federal workplace exposure limits for lead exist because the science is unambiguous: occupational lead exposure causes kidney damage, cardiovascular disease, reproductive harm, and cognitive decline in adults. EnerSys’s workers were not just employees during this period. They were unwarned participants in an uncontrolled experiment.

The deeper betrayal in this case is the paperwork. EnerSys did not simply fail to fix broken filters. The EPA’s own findings confirm that the company recorded each out-of-range pressure event, then chose to file official government monitoring reports that omitted those records entirely. That is a two-step act: first, internal documentation of a problem; second, a deliberate decision to keep that documentation away from the regulators whose entire job is to protect public health. Families living near these plants trusted that the system was working. The system was not working. EnerSys made sure regulators couldn’t see that.

The settlement itself adds one final insult to this ledger. EnerSys signed the Consent Agreement on May 20, 2024, with President Mark Matthews affixing his name. The company simultaneously “neither admits nor denies” the factual allegations. In plain language: EnerSys paid $430,500 (roughly what the average American worker earns over 8 to 9 years of full-time work at median wages), avoided a trial, avoided any admission of wrongdoing, and avoided any criminal referral. The communities near Warrensburg and Springfield received no direct remediation funds, no medical monitoring program, and no independent air quality assessment from this settlement.

Legal Receipts: What the Filing Actually Says

“From January 1, 2020 to December 31, 2022, Respondent recorded the differential pressure across the fabric filter outside of the normal operating range on at least 227 instances. Respondent failed to appropriately report these instances and associated corrective actions in the four semi-annual monitoring system performance reports covering that timeframe.”

EPA Consent Agreement and Final Order, Paragraph 31 — Warrensburg Facility Violations

“From August 18, 2022 to December 31, 2022, Respondent recorded the differential pressure across the fabric filter outside of the normal operating range on at least 46 instances. Respondent failed to appropriately report these instances and associated corrective actions in the semi-annual monitoring system performance report covering that timeframe.”

EPA Consent Agreement and Final Order, Paragraph 32 — Springfield Facility No. 1 Violations

“The CAA was promulgated ‘to protect and enhance the quality of the Nation’s air resources so as to promote the public health and welfare and the productive capacity of its population.'”

EPA Consent Agreement and Final Order, Paragraph 5 — Statutory Purpose of the Clean Air Act, citing 42 U.S.C. § 7401(b)(1)

“Respondent neither admits nor denies the specific factual allegations and allegations of violation stated herein.”

EPA Consent Agreement and Final Order, Paragraph 34(ii) — EnerSys’s Settlement Terms

“The allegations in this Consent Agreement and Final Order constitute ‘prior violations’ as that term is used in EPA’s Clean Air Act Stationary Source Civil Penalty Policy to determine Respondent’s ‘history of noncompliance.'”

EPA Consent Agreement and Final Order, Paragraph 47 — Future Enforcement Consequences

Societal Impact Mapping: Who Gets Hurt When Companies Lie to Regulators

Public Health: Lead in the Air Means Lead in the Body

Lead acid battery manufacturing plants are federally regulated as area sources of hazardous air pollutants under Section 112 of the Clean Air Act specifically because lead emissions from these facilities pose a documented, serious public health risk to surrounding communities. The EPA created the NESHAP for Lead Acid Battery Manufacturing, known as Subpart 6P, to establish minimum standards for controlling those emissions. The fabric filter systems, or baghouses, that EnerSys used at all three plants are the primary physical barrier between the lead generated inside those factories and the air breathed by people outside them.

When a baghouse operates outside its normal pressure differential range, that is the monitoring system’s way of signaling that the filter may not be capturing lead at full effectiveness. The requirement to record those events and report them to regulators exists so that enforcement agencies can verify that corrective actions actually happened and that exposure was minimized. EnerSys’s decision to record 283 such events internally while reporting zero of them to regulators eliminated that entire verification layer. The public health protection system that federal law built around these plants was effectively disabled by EnerSys’s paperwork choices, for up to three years.

The Warrensburg facility’s violation window runs from January 2020 through December 2022, a period that includes months of heightened public health vulnerability during the COVID-19 pandemic, when residents were spending more time at home and near their neighborhoods. Children, elderly residents, and anyone with a compromised respiratory system represent the population most acutely harmed by any additional lead exposure during this window. None of them were told. None of them could consent.

Environmental Degradation: Lead Doesn’t Disappear When the Shift Ends

Lead emitted into the air from industrial sources does not stay airborne. It settles. It deposits on soil, on grass, on garden vegetables, on playground surfaces, and on the exterior and interior surfaces of nearby homes. The EPA’s own regulatory framework for lead acid battery manufacturing acknowledges this deposition pathway, which is why air emission controls are treated as the first and most critical line of defense. When those controls fail and the failures go unreported, the contamination that results is silent and cumulative.

Missouri retained state environmental authority over most air quality regulations, but the EPA explicitly notes in the settlement document that Subpart 6P has not been delegated to the State of Missouri. The EPA retains sole authority over this specific NESHAP in Missouri. That means Missouri state regulators had no independent mechanism to catch EnerSys’s reporting failures. The EPA’s federal enforcement program was the only check in place, and it could only function if EnerSys filed accurate reports. EnerSys filed inaccurate reports. The environmental protection system had a gap, and EnerSys ran straight through it for three years.

Economic Inequality: The Fine That Costs EnerSys Nothing Real

EnerSys Energy Products, Inc. is a subsidiary of EnerSys, a publicly traded global industrial battery manufacturer. The $430,500 (roughly the annual salary of 8 to 9 median-income Missouri workers) penalty assessed in this settlement represents a fraction of the operational revenue generated by three active manufacturing plants over a three-year period. The settlement document explicitly states that the penalty “shall not be deductible for purposes of Federal, State and local taxes,” meaning EnerSys cannot write it off. But a non-deductible penalty of $430,500 for three years of concealed emissions violations across three facilities is still an extraordinarily low cost of doing business.

The communities most directly exposed to the risk of these violations, residents near Warrensburg and the two Springfield plant neighborhoods, are predominantly working-class and working-poor households. Industrial manufacturing facilities do not locate in wealthy suburbs. They locate near communities that have less political power to resist their presence, less access to private healthcare to detect and treat lead-related illness, and less capacity to pursue independent legal action. The $430,500 fine flows to the U.S. Treasury, not to medical monitoring funds, not to soil remediation near the facilities, and not to the workers who spent years inside these plants.

The “Cost of a Life” Metric

What Now? Who to Watch and What to Demand

Named in the Document

• Mark Matthews, President, EnerSys Energy Products, Inc. — Signed the settlement agreement on May 20, 2024
• Jodi Bruno, Acting Director, EPA Region 7 Enforcement and Compliance Assurance Division — Signed for the EPA on May 22, 2024

Regulatory Bodies to Watch

• EPA Region 7 (Kansas City / Lenexa, Kansas): Sole enforcement authority for Subpart 6P in Missouri
• EPA Office of Enforcement and Compliance Assurance: National oversight of Clean Air Act enforcement priorities
• OSHA: Occupational lead exposure standards for workers inside these three plants
• Missouri Department of Natural Resources: State-level environmental monitoring adjacent to these facilities
• CDC / ATSDR (Agency for Toxic Substances and Disease Registry): Authority to conduct community health assessments near industrial lead sources

What the Settlement Actually Leaves Open

Paragraph 43 of the settlement document states that full payment of the penalty “shall only resolve Respondent’s liability for federal civil penalties for the violations alleged herein.” The EPA explicitly reserved the right to pursue further enforcement for any other violations. Paragraph 47 formally designates these violations as “prior violations” that count against EnerSys’s compliance history in any future enforcement action. EnerSys’s record is now officially worse than clean.

Organize Locally. Demand More.

If you live near a lead acid battery manufacturing facility anywhere in the country, you have the legal right to request the EPA’s inspection records and monitoring reports for that facility through a Freedom of Information Act request. Community air monitoring programs, often run through local environmental justice organizations, can provide independent data that regulators sometimes miss. Mutual aid networks in Warrensburg and Springfield can connect residents with legal aid organizations that specialize in environmental exposure claims. The settlement closed EnerSys’s federal penalty exposure. It did not close the community’s right to organize, to demand answers, and to push for the medical monitoring programs that this settlement failed to require.