Heritage Environmental
Non-Transient non-community system in Cook County, Illinois, serving 45 people from ground water. 2 rules violated in the past three years. Privately owned.
Quarterly compliance history
2023
2023
2024
2024
2024
2024
2025
2025
2025
2025
2026
2026
2026
Rules violated in the past three years
Jul to Sep 2023 to Jul to Sep 2026
Volatile Organic Chemicals
Maximum Contaminant Level ViolationMonitoring and Reporting
Health-based
22 violations, Jul 2023 to Dec 2024 · 21 contaminants · 0.016 MG/L
Volatile Organic Chemicals
Maximum Contaminant Level ViolationMonitoring and Reporting Health-based22 violations, Jul 2023 to Dec 2024 · 21 contaminants · 0.016 MG/L
Maximum Contaminant Level Violation, health-based: 1 violation, Jul 2023 to Dec 2024. A sample exceeded the maximum contaminant level EPA allows in drinking water.
Monitoring and Reporting: 21 violations, Oct 2023 to Mar 2024. The system did not complete required monitoring, or did not report the results on time. This does not show that a contaminant was found.
Limit 0.002 MG/L · Jul to Sep 2023
Contaminants on the record: 1,2,4-Trichlorobenzene, cis-1,2-Dichloroethylene, Xylenes, Total, Dichloromethane (Methylene Chloride), o-Dichlorobenzene, p-Dichlorobenzene, Vinyl Chloride, 1,1-Dichloroethylene, trans-1,2-Dichloroethylene, 1,2-Dichloroethane, 1,1,1-Trichloroethane, Carbon Tetrachloride, 1,2-Dichloropropane, Trichloroethylene (TCE), 1,1,2-Trichloroethane, Tetrachloroethylene (PCE), Chlorobenzene, Benzene, Toluene, Ethylbenzene, Styrene.
1,2,4-Trichlorobenzene, health effects: Chronic exposure to 1,2,4-trichlorobenzene is associated with changes in adrenal gland function and liver and kidney effects in animal studies. EPA classifies it as a possible human carcinogen (Group C). Long-term exposure above the MCL is the primary concern for public water system violations. Limit: 0.07 mg/L (70 ppb)
cis-1,2-Dichloroethylene, health effects: Chronic exposure to cis-1,2-dichloroethylene is associated with liver, nervous system, and immune system effects in animal studies. EPA has not classified it as a human carcinogen based on available data. Its detection in water often signals the presence of more acutely toxic parent compounds such as TCE or vinyl chloride. Limit: 0.07 mg/L (70 ppb)
Xylenes, Total, health effects: Short-term exposure above the MCL can cause nervous system effects including headache, dizziness, and impaired coordination. Chronic exposure is associated with liver and kidney damage. EPA has not classified total xylenes as human carcinogens. The general population is at risk; children may be more sensitive to neurological effects. Limit: 10 mg/L (10,000 ppb)
Public Notice Rule and Revised PN Rule
Other Violation
2 violations, Oct 2023 to Nov 2023 · Public Notification Rule
Public Notice Rule and Revised PN Rule
Other Violation2 violations, Oct 2023 to Nov 2023 · Public Notification Rule
Other Violation: 2 violations, Oct 2023 to Nov 2023. A requirement other than monitoring, reporting, or a contaminant limit, such as public notice or the annual water quality report.
Contaminant on the record: Public Notification Rule.
Lead and copper at the tap
The 90th percentile of the tap samples the system collected in its latest monitoring period, against EPA's action level. Levels vary between homes.
Action level 0.015 mg/L · Jan 2017 to Dec 2019
Action level 1.3 mg/L · Jan to Dec 2013
About this data
Rules violated and the list above come from EPA's SDWIS violation records, one row per violation and contaminant, grouped by the rule each row belongs to. A violation counts when its non-compliance period ended on or after Jul 1, 2023, the start of the thirteen quarters ECHO's three-year figures cover, or is still open; it is unresolved when it was still open at EPA's data refresh on Oct 7, 2026. EPA's rule code 500, "Not Regulated", is left out, as in ECHO's counts. Each rule's violation count is EPA's, and one rule can carry several: a missed monitoring round for a group of contaminants is one violation per contaminant and period. Category names are EPA's violation categories.
ECHO's own summary count of rules violated agrees with this grouping for 98.8% of active systems nationally, and its count of rules being violated for 98.7%; where they differ, the figures here follow the rows listed.
A measured value shown with a rule is the sample result EPA recorded with that violation (SDWIS viol_measure), against the limit EPA recorded on the same row (state_mcl), both in EPA's unit as written; violations without a recorded value, such as missed monitoring, show none. Other measured contaminant levels are not part of this record; each system publishes them in its annual Consumer Confidence Report.
Lead and copper are the newest 90th-percentile results in EPA's SDWA data download (LCR_SAMPLES, codes PB90 and CU90), retrieved on Oct 12, 2026: for each monitoring period a system reports the 90th-percentile value of its tap samples, which EPA compares with its action level of 0.015 mg/L for lead and 1.3 mg/L for copper (40 CFR 141.80). A result is not a measurement of any one tap.
Service area from EPA's Public Water System Service Area Boundaries dataset: location confidence HIGHER. The system's location is the centre of the service area EPA publishes for the system.
Source: the U.S. EPA's Enforcement and Compliance History Online system (ECHO), which publishes the federal Safe Drinking Water Information System. EPA's terms and values are shown as published. The Illinois records are from EPA's data refresh of Oct 7, 2026; EPA refreshes this data quarterly, and states report to EPA with a lag of three to six months, so the newest violations may not appear yet. Retrieved from ECHO on Oct 11, 2026.