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Northlake Partners, LTD.

Mobile Home Site Operators, Denton County, Texas. NPDES permit TX0120022, in force until Nov 4, 2026. Last 12 months: over a limit 9 times (last May 2026). Source: EPA ECHO, Oct 22, 2026.

Reports due: About 20 days after each period: form A monthly (13 values), form Q quarterly
Renewal application due: May 8, 2026 · 180 days before expiry; your permit may set another date
Last report on file: August 2026
Oct 2024 – Sep 2025: 3 values over a limit, 0 required values missing, 0 of 16 reports late

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

Period ending	Parameter	Reported	Limit	Over by
October 2025	Solids, total suspended, daily average	17.8 mg/L	≤ 15 mg/L	19%
October 2025	Solids, total suspended, single grab sample	74 mg/L	≤ 60 mg/L	23%
November 2025	E. coli, single grab sample	2420 CFU/100mL	≤ 399 CFU/100mL	507%
November 2025	Flow, in conduit or thru treatment plant, daily average	.031 MGD	≤ .025 MGD	24%
May 2026	BOD, 5-day, 20 deg. C, daily average	11.75 mg/L	≤ 10 mg/L	18%
May 2026	BOD, 5-day, 20 deg. C, single grab sample	41 mg/L	≤ 35 mg/L	17%
May 2026	Solids, total suspended, daily average	3.22 lb/d	≤ 3.1 lb/d	4%
May 2026	Solids, total suspended, daily average	47 mg/L	≤ 15 mg/L	213%
May 2026	Solids, total suspended, single grab sample	182 mg/L	≤ 60 mg/L	203%

Limits in force (15)

Parameter	Statistic	Limit	Months
Oxygen, dissolved [DO]	monthly minimum	≥ 4 mg/L	all year
BOD, 5-day, 20 deg. C	daily average	≤ 10 mg/L	all year
BOD, 5-day, 20 deg. C	single grab sample	≤ 35 mg/L	all year
BOD, 5-day, 20 deg. C	daily average	≤ 2.1 lb/d	all year
pH	minimum	≥ 6 SU	all year
pH	maximum	≤ 9 SU	all year
Solids, total suspended	daily average	≤ 15 mg/L	all year
Solids, total suspended	single grab sample	≤ 60 mg/L	all year
Solids, total suspended	daily average	≤ 3.1 lb/d	all year
Flow, in conduit or thru treatment plant	daily average	≤ .025 MGD	all year
Flow, in conduit or thru treatment plant	daily maximum	report only (MGD)	all year
Chlorine, total residual	monthly minimum	≥ 1 mg/L	all year
Chlorine, total residual	monthly maximum	≤ 4 mg/L	all year
E. coli	daily average	≤ 126 CFU/100mL	all year
E. coli	single grab sample	≤ 399 CFU/100mL	all year

How strict are these limits?

BOD, 5-day, 20 deg. C, daily average 10 mg/L — stricter than 58% of 272 other minor industrial and other permits in Texas; 41% have the same limit
BOD, 5-day, 20 deg. C, single grab sample 35 mg/L — stricter than 47% of 205 other minor industrial and other permits in Texas; 52% have the same limit
Solids, total suspended, daily average 15 mg/L — stricter than 35% of 777 other minor industrial and other permits in Texas; 60% have the same limit

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

Same industry: the 78 Real Estate permits in Texas.

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On EPA ECHO: Facility report · DMR history

Your permit document is the final word. As JSON: /api/v1/permits/TX0120022 · MCP: https://passage-data.com/mcp