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Montebello W.T.P.

Water Supply, Baltimore, Maryland. NPDES permit MD0003042 expired May 31, 2024; its limits still apply. Last 12 months: over a limit 4 times (last August 2026). Source: EPA ECHO, Oct 22, 2026.

Reports due: About 28 days after each period: form A monthly (9 values)
Last report on file: August 2026
Oct 2024 – Sep 2025: 0 values over a limit, 0 required values missing, 0 of 12 reports late

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

Period ending	Parameter	Reported	Limit	Over by
February 2026	Chlorine, total residual, maximum	.136 mg/L	≤ .1 mg/L	36%
July 2026	Solids, total suspended, maximum monthly average	71.5 mg/L	≤ 20 mg/L	258%
July 2026	Solids, total suspended, maximum daily average	272 mg/L	≤ 30 mg/L	807%
August 2026	Solids, total suspended, maximum daily average	37.6 mg/L	≤ 30 mg/L	25%

Limits in force (9)

Parameter	Statistic	Limit	Months
pH	minimum	≥ 6.5 SU	all year
pH	maximum	≤ 8.5 SU	all year
Solids, total suspended	maximum monthly average	≤ 20 mg/L	all year
Solids, total suspended	maximum daily average	≤ 30 mg/L	all year
Aluminum, total recoverable	maximum monthly average	≤ 1 mg/L	all year
Aluminum, total recoverable	maximum daily average	≤ 2 mg/L	all year
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
Chlorine, total residual	maximum	≤ .1 mg/L	all year

How strict are these limits?

Solids, total suspended, maximum monthly average 20 mg/L — stricter than 72% of 99 other minor industrial and other permits in Maryland; 18% have the same limit
pH, minimum at least 6.5 SU — stricter than 15% of 145 other minor industrial and other permits in Maryland; 84% have the same limit

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

Same industry: the 18 Water Supply 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/MD0003042 · MCP: https://passage-data.com/mcp