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Aquatic Research Organisms Inc

Testing Laboratories, Hampton, New Hampshire. NPDES permit NH0022985 expired May 31, 2026; its limits still apply. Last 12 months: over a limit 3 times (last September 2026), 2 of 18 reports late. Source: EPA ECHO, Oct 22, 2026.

Reports due
About 15 days after each period: form A monthly (13 values), form Q quarterly (3 values), form T quarterly (9 values), form TA quarterly (9 values)
Last report on file
September 2026
Oct 2024 – Sep 2025
0 values over a limit, 0 required values missing, 0 of 18 reports late

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

Period endingParameterReportedLimitOver by
February 2026Solids, total suspended, daily maximum58 mg/L≤ 50 mg/L16%
June 2026Enterococci, daily maximum260 #/100mL≤ 104 #/100mL150%
September 2026Enterococci, daily maximum260 #/100mL≤ 104 #/100mL150%

Limits in force (34)

ParameterStatisticLimitMonths
Temperature, water deg. centigradedaily maximumreport only (deg C)Jul–Sep
pHminimum≥ 6.5 SUall year
pHmaximum≤ 8 SUall year
pHdaily maximumreport only (SU)Jul–Sep
Salinitydaily maximumreport only (ppt)Jul–Sep
Solids, total suspendedmonthly averagereport only (mg/L)all year
Solids, total suspendeddaily maximum≤ 50 mg/Lall year
Nitrogen, total [as N]daily maximumreport only (mg/L)all year
Nitrogen, ammonia total [as N]daily maximumreport only (mg/L)Jul–Sep
Nitrogen, ammonia total [as N]daily maximumreport only (mg/L)Jul–Sep
Phosphorus, total [as P]daily maximumreport only (mg/L)all year
Nickel, total recoverabledaily maximumreport only (mg/L)Jul–Sep
Nickel, total recoverabledaily maximumreport only (mg/L)Jul–Sep
Zinc, total recoverabledaily maximumreport only (mg/L)Jul–Sep
Zinc, total recoverabledaily maximumreport only (mg/L)Jul–Sep
Cadmium, total recoverabledaily maximumreport only (mg/L)Jul–Sep
Cadmium, total recoverabledaily maximumreport only (mg/L)Jul–Sep
Lead, total recoverabledaily maximumreport only (mg/L)Jul–Sep
Lead, total recoverabledaily maximumreport only (mg/L)Jul–Sep
Copper, total recoverabledaily maximumreport only (mg/L)Jul–Sep
Copper, total recoverabledaily maximumreport only (mg/L)Jul–Sep
Coliform, fecal - % samples exceeding limitdaily maximum≤ 10 %all year
Flow, in conduit or thru treatment plantmonthly average≤ 7000 gal/dall year
Flow, in conduit or thru treatment plantdaily maximum≤ 12000 gal/dall year
Chlorine, total residualmonthly average≤ .75 mg/Lall year
Chlorine, total residualdaily maximum≤ 1 mg/Lall year
Enterococcimonthly geometric mean≤ 35 #/100mLall year
Enterococcidaily maximum≤ 104 #/100mLall year
Formaldehydedaily maximumreport only (mg/L)all year
Coliform, fecal generalmonthly geometric mean≤ 14 #/100mLall year
Coliform, fecal generaldaily maximumreport only (#/100mL)all year
LC50 Static 48Hr Acute Americamysis bahia (formerly Mysidopsis bahia)monthly average minimum≥ 100 %Jul–Sep
LC50 Static 48Hr Acute Americamysis bahia (formerly Mysidopsis bahia)daily maximumreport only (%)Jul–Sep
LC50 Static 48Hr Acute Menidiamonthly average minimum≥ 100 %Jul–Sep

How strict are these limits?

Cited limits by parameter: New Hampshire'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/NH0022985 · MCP: https://passage-data.com/mcp