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Testing Laboratories, Naperville, Illinois. NPDES permit IL0045241, in force until May 31, 2029. Last 12 months: no values over a limit, 3 of 12 reports late. Source: EPA ECHO, Oct 22, 2026.
| Parameter | Statistic | Limit | Months |
|---|---|---|---|
| Temperature, water deg. fahrenheit | monthly maximum | ≤ 63 deg F | Jan, Feb, Mar, Dec |
| Temperature, water deg. fahrenheit | monthly maximum | ≤ 93 deg F | Apr–Nov |
| Flow, in conduit or thru treatment plant | monthly average | report only (MGD) | all year |
| Flow, in conduit or thru treatment plant | daily maximum | report only (MGD) | all year |
Cited limits by parameter: Illinois's rules and the federal ones.
Same industry: the 7 Engineering, Accounting, Research and Management Services permits in Illinois.
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On EPA ECHO: Facility report · DMR history
Your permit document is the final word. As JSON: /api/v1/permits/IL0045241 · MCP: https://passage-data.com/mcp