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Royce Silver Maples LLC

Mobile Home Site Operators, Concord, North Carolina. NPDES permit NC0047091, in force until Jul 31, 2029. Last 12 months: over a limit 12 times (last May 2026), 6 of 11 reports late. Source: EPA ECHO, Oct 22, 2026.

Reports due: About 31 days after each period: form M monthly (12 values)
Last report on file: August 2026
Oct 2024 – Sep 2025: 28 values over a limit, 26 required values missing, 12 of 12 reports late

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

Period ending	Parameter	Reported	Limit	Over by
December 2025	BOD, 5-day, 20 deg. C, 30-day average	28.4 mg/L	≤ 13 mg/L	118%
December 2025	BOD, 5-day, 20 deg. C, daily maximum	59 mg/L	≤ 19.5 mg/L	203%
January 2026	BOD, 5-day, 20 deg. C, 30-day average	18.8 mg/L	≤ 13 mg/L	45%
January 2026	BOD, 5-day, 20 deg. C, daily maximum	22 mg/L	≤ 19.5 mg/L	13%
February 2026	BOD, 5-day, 20 deg. C, 30-day average	20.45 mg/L	≤ 13 mg/L	57%
February 2026	BOD, 5-day, 20 deg. C, daily maximum	45 mg/L	≤ 19.5 mg/L	131%
March 2026	BOD, 5-day, 20 deg. C, 30-day average	19.325 mg/L	≤ 13 mg/L	49%
March 2026	BOD, 5-day, 20 deg. C, daily maximum	31 mg/L	≤ 19.5 mg/L	59%
April 2026	BOD, 5-day, 20 deg. C, 30-day average	21.08 mg/L	≤ 13 mg/L	62%
April 2026	BOD, 5-day, 20 deg. C, daily maximum	30 mg/L	≤ 19.5 mg/L	54%
May 2026	BOD, 5-day, 20 deg. C, 30-day average	13.5 mg/L	≤ 13 mg/L	4%
May 2026	BOD, 5-day, 20 deg. C, daily maximum	21 mg/L	≤ 19.5 mg/L	8%

Limits in force (12)

Parameter	Statistic	Limit	Months
Temperature, water deg. centigrade	daily maximum	report only (deg C)	all year
BOD, 5-day, 20 deg. C	30-day average	≤ 13 mg/L	all year
BOD, 5-day, 20 deg. C	daily maximum	≤ 19.5 mg/L	all year
pH	daily minimum	≥ 6 SU	all year
pH	daily maximum	≤ 9 SU	all year
Solids, total suspended	30-day average	≤ 30 mg/L	all year
Solids, total suspended	daily maximum	≤ 45 mg/L	all year
Nitrogen, ammonia total [as N]	daily maximum	report only (mg/L)	all year
Coliform, fecal MF, MFC broth, 44.5 C	monthly geometric mean	≤ 200 #/100mL	all year
Coliform, fecal MF, MFC broth, 44.5 C	daily maximum	≤ 400 #/100mL	all year
Flow, in conduit or thru treatment plant	30-day average	≤ .04 MGD	all year
Chlorine, total residual	daily maximum	≤ 28 ug/L	all year

How strict are these limits?

BOD, 5-day, 20 deg. C, 30-day average 13 mg/L — stricter than 77% of 380 other minor industrial and other permits in North Carolina
BOD, 5-day, 20 deg. C, daily maximum 19.5 mg/L — stricter than 77% of 374 other minor industrial and other permits in North Carolina

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

Same industry: the 66 Real Estate permits in North Carolina.

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Your permit document is the final word. As JSON: /api/v1/permits/NC0047091 · MCP: https://passage-data.com/mcp