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Hampton, City of

Sewage treatment plant, Hampton, Arkansas. NPDES permit AR0021873 expired Sep 30, 2025; its limits still apply. Last 12 months: over a limit 5 times (last February 2026), 2 of 12 reports late. Source: EPA ECHO, Oct 22, 2026.

Reports due
About 25 days after each period: form A monthly (19 values)
Last report on file
September 2026
Oct 2024 – Sep 2025
4 values over a limit, 0 required values missing, 3 of 12 reports late

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

Period endingParameterReportedLimitOver by
November 2025Chlorine, total residual, instantaneous maximum.06 mg/L≤ .011 mg/L445%
November 2025Solids, total suspended, monthly average94.15 mg/L≤ 90 mg/L5%
December 2025Chlorine, total residual, instantaneous maximum.04 mg/L≤ .011 mg/L264%
January 2026Chlorine, total residual, instantaneous maximum.03 mg/L≤ .011 mg/L173%
February 2026Chlorine, total residual, instantaneous maximum.08 mg/L≤ .011 mg/L627%

Limits in force (31)

ParameterStatisticLimitMonths
Oxygen, dissolved [DO]instantaneous minimum≥ 5 mg/Lall year
pHminimum≥ 6 SUall year
pHmaximum≤ 9 SUall year
Solids, total suspendedmonthly average≤ 90 mg/LJan, Feb, Mar, Apr, Nov, Dec
Solids, total suspendedmonthly average≤ 30 mg/LMay–Oct
Solids, total suspended7-day average≤ 135 mg/LJan, Feb, Mar, Apr, Nov, Dec
Solids, total suspended7-day average≤ 45 mg/LMay–Oct
Solids, total suspendedmonthly average≤ 225.2 lb/dJan, Feb, Mar, Apr, Nov, Dec
Solids, total suspendedmonthly average≤ 75.1 lb/dMay–Oct
Nitrogen, ammonia total [as N]monthly average≤ 6.1 mg/LApr
Nitrogen, ammonia total [as N]monthly average≤ 10 mg/LJan, Feb, Mar, Nov, Dec
Nitrogen, ammonia total [as N]monthly average≤ 5 mg/LMay–Oct
Nitrogen, ammonia total [as N]7-day average≤ 6.1 mg/LApr
Nitrogen, ammonia total [as N]7-day average≤ 15 mg/LJan, Feb, Mar, Nov, Dec
Nitrogen, ammonia total [as N]7-day average≤ 7.5 mg/LMay–Oct
Nitrogen, ammonia total [as N]monthly average≤ 15.3 lb/dApr
Nitrogen, ammonia total [as N]monthly average≤ 25 lb/dJan, Feb, Mar, Nov, Dec
Nitrogen, ammonia total [as N]monthly average≤ 12.5 lb/dMay–Oct
Flow, in conduit or thru treatment plantmonthly averagereport only (MGD)all year
Flow, in conduit or thru treatment plantdaily maximumreport only (MGD)all year
Chlorine, total residualinstantaneous maximum≤ .011 mg/Lall year
Coliform, fecal general30-day geometric mean≤ 1000 #/100mLall year
Coliform, fecal general7-day geometric mean≤ 2000 #/100mLall year
Overflowsmonthly totalreport only (occur/mo)all year
Overflow volume [SS0 volume, CSO volume]monthly totalreport only (gal)all year
BOD, carbonaceous [5 day, 20 C]monthly average≤ 20 mg/LMay–Oct
BOD, carbonaceous [5 day, 20 C]monthly average≤ 25 mg/LJan, Feb, Mar, Apr, Nov, Dec
BOD, carbonaceous [5 day, 20 C]7-day average≤ 30 mg/LMay–Oct
BOD, carbonaceous [5 day, 20 C]7-day average≤ 38 mg/LJan, Feb, Mar, Apr, Nov, Dec
BOD, carbonaceous [5 day, 20 C]monthly average≤ 50 lb/dMay–Oct
BOD, carbonaceous [5 day, 20 C]monthly average≤ 62.6 lb/dJan, Feb, Mar, Apr, Nov, Dec

How strict are these limits?

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

Check this month's numbers Email me before each report is due

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On EPA ECHO: Facility report · DMR history

Your permit document is the final word. As JSON: /api/v1/permits/AR0021873 · MCP: https://passage-data.com/mcp