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Teledyne Energy Systems,Inc.

General Industrial Machinery, Hunt Valley, Maryland. NPDES permit MD0065901 expired Jul 31, 2026; its limits still apply. Last 12 months: over a limit 2 times (last May 2026). Source: EPA ECHO, Oct 22, 2026.

Reports due
About 58 days after each period: form A quarterly (18 values)
Last report on file
August 2026
Oct 2024 – Sep 2025
0 values over a limit, 18 required values missing, 2 of 12 reports late

Last 12 months (Oct 1, 2025 – Sep 30, 2026)

Period endingParameterReportedLimitOver by
May 2026Chlorine, total residual, daily maximum.6 mg/L≤ .1 mg/L500%
May 2026Chlorine, total residual, monthly average.35 mg/L≤ .1 mg/L250%

Limits in force (18)

ParameterStatisticLimitMonths
Oxygen, dissolved [DO]instantaneous minimum≥ 5 mg/Lall year
Oxygen, dissolved [DO]instantaneous minimum≥ 5 mg/Lall year
Oxygen, dissolved [DO]monthly average minimum≥ 6 mg/Lall year
Oxygen, dissolved [DO]monthly average minimum≥ 6 mg/Lall year
pHminimum≥ 6 SUall year
pHminimum≥ 6 SUall year
pHmaximum≤ 9 SUall year
pHmaximum≤ 9 SUall year
Temp. diff. between up/down stream deg. Fdaily maximum≤ 0 deg Fall year
Temp. diff. between up/down stream deg. Fdaily maximum≤ 0 deg Fall year
Flow, in conduit or thru treatment plantmonthly averagereport only (gal/d)all year
Flow, in conduit or thru treatment plantmonthly averagereport only (gal/d)all year
Flow, in conduit or thru treatment plantdaily maximumreport only (gal/d)all year
Flow, in conduit or thru treatment plantdaily maximumreport only (gal/d)all year
Chlorine, total residualmonthly average≤ .1 mg/Lall year
Chlorine, total residualmonthly average≤ .1 mg/Lall year
Chlorine, total residualdaily maximum≤ .1 mg/Lall year
Chlorine, total residualdaily maximum≤ .1 mg/Lall year

How strict are these limits?

Cited limits by parameter: Maryland's rules and the federal ones.

Same industry: the 3 Industrial and Commercial Machinery and Computer Equipment permits in Maryland.

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On EPA ECHO: Facility report · DMR history

Your permit document is the final word. As JSON: /api/v1/permits/MD0065901 · MCP: https://passage-data.com/mcp