Lemont Water Quality
Illinois
According to EPA SDWIS, Lemont, Illinois is served by 3 community water systems covering about 18,095 people. The same extract lists 16 health-based violation records, most recently coded 5000 in 2025. Counts are historical EPA registry rows, not a current compliance or drinkability score.
Drinking water in Lemont, Illinois is delivered through 3 EPA-regulated community water systems serving an estimated 18,095 people. Each system is tracked in the EPA Safe Drinking Water Information System (SDWIS) under the Safe Drinking Water Act, which requires testing for regulated contaminants, consumer notification of violations, and publication of an annual Consumer Confidence Report.
PlainEnviro's health-based SDWIS extract shows 16 violation records across the 3 active community systems shown here. Monitoring and reporting records are not present in the extract. The records carry 4 distinct EPA contaminant codes: Lead and Copper Rule, LEAD AND COPPER RULE REVISIONS, Revised Total Coliform Rule, Combined Radium (-226 and -228). 6 TRI-reporting industrial facilities are also located within the city limits.
A past EPA health-based registry row does not describe water delivered today or current compliance status; utilities notify customers and remediate under state primacy oversight when required. For current water-quality status and treatment practices, review your local utility's most recent Consumer Confidence Report or contact the Illinois drinking water program. All records above reflect federal EPA SDWIS data and are not independently verified against state databases.
Community Water Systems
| System Name | Pop. Served | Violations | Status |
|---|---|---|---|
| LEMONT | 17,500 | 11 | Health |
| FRANCISCAN SISTERS OF CHICAGO | 505 | 0 | Clean |
| SHERWOOD SHORES CONDOMINIUMS | 90 | 5 | Health |
Does this city have health-based water violations?
These health-based records can represent Maximum Contaminant Level (MCL), Treatment Technique (TT), or Maximum Residual Disinfectant Level (MRDL) categories. A historical record does not establish that water is currently unsafe.
| Water system | Contaminant | Begin Date |
|---|---|---|
| LEMONT | Lead and Copper Rule | 2025-08-31 |
| SHERWOOD SHORES CONDOMINIUMS | LEAD AND COPPER RULE REVISIONS | 2024-10-17 |
| SHERWOOD SHORES CONDOMINIUMS | LEAD AND COPPER RULE REVISIONS | 2024-10-17 |
| SHERWOOD SHORES CONDOMINIUMS | Revised Total Coliform Rule | 2024-06-01 |
| SHERWOOD SHORES CONDOMINIUMS | Revised Total Coliform Rule | 2024-06-01 |
| SHERWOOD SHORES CONDOMINIUMS | Revised Total Coliform Rule | 2024-06-01 |
| LEMONT | Combined Radium (-226 and -228) | 2015-10-01 |
| LEMONT | Combined Radium (-226 and -228) | 2015-10-01 |
| LEMONT | Combined Radium (-226 and -228) | 2015-07-01 |
| LEMONT | Combined Radium (-226 and -228) | 2015-07-01 |
| LEMONT | Combined Radium (-226 and -228) | 2015-04-01 |
| LEMONT | Combined Radium (-226 and -228) | 2015-04-01 |
| LEMONT | Combined Radium (-226 and -228) | 2015-01-01 |
| LEMONT | Combined Radium (-226 and -228) | 2015-01-01 |
| LEMONT | Combined Radium (-226 and -228) | 2015-01-01 |
| LEMONT | Combined Radium (-226 and -228) | 2015-01-01 |
What are Lemont's health-based records for?
Lemont's health-based violation records carry 4 distinct EPA codes: some name a substance, others the drinking-water rule that was breached. Counts are records on file in the EPA SDWIS extract, not current test results.
| Contaminant | Records | Systems |
|---|---|---|
| Combined Radium (-226 and -228) | 10 | 1 |
| Revised Total Coliform Rule | 3 | 1 |
| Lead and Copper Rule Revisions | 2 | 1 |
| Lead and Copper Rule | 1 | 1 |
TRI Facilities in Lemont
| Facility | Total Releases |
|---|---|
| Citgo Petroleum Corp Lemont Refinery | 1.1M lbs |
| U.S. Doe Argonne National Laboratory | 151.1K lbs |
| Cci Manufacturing Il Corp | 39.6K lbs |
| K.a. Steel Chemicals Inc. D/b/a Olin Chlor Alkali Products & | 486 lbs |
| Oxbow Midwest Calcining LLC | 304 lbs |
| Ozinga Il Rmc Lemont | 0 lbs |
Frequently Asked Questions
What does EPA SDWIS list for drinking water in Lemont, Illinois? ▼
How many water violations does Lemont have in this EPA extract? ▼
What contaminants were found in Lemont water? ▼
How many water systems serve Lemont? ▼
Where does Lemont get its drinking water? ▼
Are there pollution sources near Lemont? ▼
How does Lemont compare in Illinois?
Of the 1,034 Illinois places with at least one community water system on file, Lemont ranks #95 by number of systems (3).
Either side of it: Lake Villa (3), Lake Zurich (3), Lincoln (3), Melrose Park (3)
About This Data
Figures here are the current EPA SDWIS extract joined to the 3 community water systems whose service area lists Lemont, ranked against the 1,034 Illinois places with at least one system on file. Data current as of 2026-08-25.
Water system data comes from the EPA's Safe Drinking Water Information System (SDWIS). PlainEnviro's violation fetch is restricted upstream to records EPA flags as health-based and then joined to active community water systems. Monitoring and reporting violations are not included.
A health-based violation row in this extract is a historical EPA registry entry. It does not describe water delivered today or current compliance status. Many records are later resolved, and public water systems notify customers when required. For current conditions, contact your local water utility or the state drinking water program.
TRI facility data comes from the EPA Toxic Release Inventory. Facilities shown are those that self-report to the TRI program. PlainEnviro presents this data without advocacy framing.
Read our methodology - how this data is sourced, computed, and verified.