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Ogallala WWTF

Sewage treatment plant, major discharger, Ogallala, Nebraska. NPDES permit NE0040045, in force until Sep 30, 2029. Last 12 months: over a limit 45 times (last June 2026), 3 required values missing, 8 of 25 reports late. Source: EPA ECHO, Oct 22, 2026.

Reports due
About 28 days after each period: outfall 001 form A yearly (10 values), outfall 001 form M quarterly (24 values), outfall 001 form Q quarterly (2 values), outfall 001 form R yearly (8 values), outfall 001 form S twice a year (8 values), outfall INF form M quarterly (1 value), and 2 more forms
Last report on file
June 2026
Oct 2024 – Sep 2025
20 values over a limit, 12 required values missing, 10 of 37 reports late

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

All 45 values over a limit
Period endingParameterReportedLimitOver by
October 2025Nitrogen, ammonia total [as N], daily maximum15 mg/L≤ 1.09 mg/L1276%
October 2025Nitrogen, ammonia total [as N], daily maximum18.71 kg/d≤ 2.11 kg/d787%
October 2025Nitrogen, ammonia total [as N], monthly average4.04 mg/L≤ .54 mg/L648%
October 2025Nitrogen, ammonia total [as N], monthly average5.04 kg/d≤ 1.05 kg/d380%
November 2025Nitrogen, ammonia total [as N], daily maximum19.89 kg/d≤ 16.02 kg/d24%
November 2025Nitrogen, ammonia total [as N], monthly average13.34 kg/d≤ 6.29 kg/d112%
November 2025Nitrogen, ammonia total [as N], monthly average6.84 mg/L≤ 4.56 mg/L50%
December 2025Nitrogen, ammonia total [as N], daily maximum32.7 mg/L≤ 11.59 mg/L182%
December 2025Nitrogen, ammonia total [as N], daily maximum65.27 kg/d≤ 16.02 kg/d307%
December 2025Nitrogen, ammonia total [as N], monthly average11.85 mg/L≤ 4.56 mg/L160%
December 2025Nitrogen, ammonia total [as N], monthly average23.65 kg/d≤ 6.29 kg/d276%
January 2026Nitrogen, ammonia total [as N], monthly average12.49 kg/d≤ 6.29 kg/d99%
January 2026Nitrogen, ammonia total [as N], monthly average6.04 mg/L≤ 4.56 mg/L32%
February 2026Nitrogen, ammonia total [as N], daily maximum20.24 kg/d≤ 16.02 kg/d26%
February 2026Nitrogen, ammonia total [as N], monthly average4.84 mg/L≤ 4.56 mg/L6%
February 2026Nitrogen, ammonia total [as N], monthly average9.51 kg/d≤ 6.29 kg/d51%
March 2026Nitrogen, ammonia total [as N], daily maximum28.9 mg/L≤ 13.04 mg/L122%
March 2026Nitrogen, ammonia total [as N], daily maximum59.64 kg/d≤ 24.7 kg/d141%
March 2026Nitrogen, ammonia total [as N], monthly average24.66 mg/L≤ 6.5 mg/L279%
March 2026Nitrogen, ammonia total [as N], monthly average50.89 kg/d≤ 12.31 kg/d313%
March 2026Oil and grease, hexane extr method, daily maximum12.4 mg/L≤ 10 mg/L24%
March 2026Solids, total suspended, monthly average41.5 mg/L≤ 30 mg/L38%
April 2026BOD, carbonaceous [5 day, 20 C], monthly average118.22 kg/d≤ 83.3 kg/d42%
April 2026BOD, carbonaceous [5 day, 20 C], monthly average50.28 mg/L≤ 25 mg/L101%
April 2026BOD, carbonaceous [5 day, 20 C], weekly average141.06 kg/d≤ 133.2 kg/d6%
April 2026BOD, carbonaceous [5 day, 20 C], weekly average60 mg/L≤ 40 mg/L50%
April 2026Nitrogen, ammonia total [as N], daily maximum27.7 mg/L≤ 13.04 mg/L112%
April 2026Nitrogen, ammonia total [as N], daily maximum65.13 kg/d≤ 24.7 kg/d164%
April 2026Nitrogen, ammonia total [as N], monthly average25.28 mg/L≤ 6.5 mg/L289%
April 2026Nitrogen, ammonia total [as N], monthly average59.44 kg/d≤ 12.31 kg/d383%
April 2026Solids, total suspended, weekly average167.63 kg/d≤ 149.9 kg/d12%
April 2026Solids, total suspended, weekly average71.3 mg/L≤ 45 mg/L58%
May 2026Nitrogen, ammonia total [as N], daily maximum31.4 mg/L≤ 13.04 mg/L141%
May 2026Nitrogen, ammonia total [as N], monthly average14.1 kg/d≤ 12.31 kg/d15%
May 2026Nitrogen, ammonia total [as N], monthly average30.58 mg/L≤ 6.5 mg/L370%
May 2026Solids, total suspended, monthly average48.9 mg/L≤ 30 mg/L63%
May 2026Solids, total suspended, weekly average94.9 mg/L≤ 45 mg/L111%
June 2026BOD, carbonaceous [5 day, 20 C], weekly average135.5 kg/d≤ 133.2 kg/d2%
June 2026Nitrogen, ammonia total [as N], daily maximum171.16 kg/d≤ 2.11 kg/d8012%
June 2026Nitrogen, ammonia total [as N], daily maximum28.3 mg/L≤ 1.09 mg/L2496%
June 2026Nitrogen, ammonia total [as N], monthly average155.4 kg/d≤ 1.05 kg/d14700%
June 2026Nitrogen, ammonia total [as N], monthly average25.7 mg/L≤ .54 mg/L4659%
June 2026Solids, total suspended, monthly average193.8 kg/d≤ 99.9 kg/d94%
June 2026Solids, total suspended, monthly average32.05 mg/L≤ 30 mg/L7%
June 2026Solids, total suspended, weekly average202.6 kg/d≤ 149.9 kg/d35%

Limits in force (83)

ParameterStatisticLimitMonthsOutfall
Temperature, water deg. fahrenheitmonthly averagereport only (deg F)all year001
Temperature, water deg. fahrenheitdaily maximumreport only (deg F)all year001
Oxygen, dissolved [DO]valuereport only (mg/L)all year001
Oxygen, dissolved [DO]minimum valuereport only (mg/L)all year001
pHdaily minimum≥ 6.5 SUall year001
pHdaily maximum≤ 9 SUall year001
Solids, total suspendedmonthly average≤ 30 mg/Lall year001
Solids, total suspendedweekly average≤ 45 mg/Lall year001
Solids, total suspendedmonthly average≤ 99.9 kg/dall year001
Solids, total suspendedweekly average≤ 149.9 kg/dall year001
Oil and grease, hexane extr methodmonthly averagereport only (mg/L)all year001
Oil and grease, hexane extr methoddaily maximum≤ 10 mg/Lall year001
Nitrogen, total [as N]monthly averagereport only (mg/L)all year001
Nitrogen, total [as N]daily maximumreport only (mg/L)all year001
Nitrogen, ammonia total [as N]monthly average≤ 4.56 mg/LJan, Feb, Nov, Dec001
Nitrogen, ammonia total [as N]monthly average≤ 6.5 mg/LMar–May001
Nitrogen, ammonia total [as N]monthly average≤ .54 mg/LJun–Oct001
Nitrogen, ammonia total [as N]daily maximum≤ 11.59 mg/LJan, Feb, Nov, Dec001
Nitrogen, ammonia total [as N]daily maximum≤ 13.04 mg/LMar–May001
Nitrogen, ammonia total [as N]daily maximum≤ 1.09 mg/LJun–Oct001
Nitrogen, ammonia total [as N]monthly average≤ 6.29 kg/dJan, Feb, Nov, Dec001
Nitrogen, ammonia total [as N]monthly average≤ 12.31 kg/dMar–May001
Nitrogen, ammonia total [as N]monthly average≤ 1.05 kg/dJun–Oct001
Nitrogen, ammonia total [as N]daily maximum≤ 16.02 kg/dJan, Feb, Nov, Dec001
Nitrogen, ammonia total [as N]daily maximum≤ 24.7 kg/dMar–May001
Nitrogen, ammonia total [as N]daily maximum≤ 2.11 kg/dJun–Oct001
Nitrogen, Kjeldahl, total [as N]valuereport only (mg/L)all year001
Nitrogen, Kjeldahl, total [as N]minimum valuereport only (mg/L)all year001
Nitrite + Nitrate total [as N]valuereport only (mg/L)all year001
Nitrite + Nitrate total [as N]minimum valuereport only (mg/L)all year001
Phosphorus, total [as P]monthly averagereport only (mg/L)all year001
Phosphorus, total [as P]daily maximumreport only (mg/L)all year001
Cadmium, dissolved [as Cd]monthly averagereport only (mg/L)all year001
Cadmium, dissolved [as Cd]daily maximumreport only (mg/L)all year001
Chromium, dissolved [as Cr]monthly averagereport only (mg/L)all year001
Chromium, dissolved [as Cr]daily maximumreport only (mg/L)all year001
Copper, dissolved [as Cu]monthly averagereport only (mg/L)all year001
Copper, dissolved [as Cu]daily maximumreport only (mg/L)all year001
Lead, dissolved [as Pb]monthly averagereport only (mg/L)all year001
Lead, dissolved [as Pb]daily maximumreport only (mg/L)all year001
Nickel, dissolved [as Ni]monthly averagereport only (mg/L)all year001
Nickel, dissolved [as Ni]daily maximumreport only (mg/L)all year001
Zinc, dissolved [as Zn]monthly average≤ 1.213 mg/LMar–May001
Zinc, dissolved [as Zn]monthly average≤ .256 mg/LJun–Oct001
Zinc, dissolved [as Zn]monthly average≤ .276 mg/LJan, Feb, Nov, Dec001
Zinc, dissolved [as Zn]daily maximum≤ 2.434 mg/LMar–May001
Zinc, dissolved [as Zn]daily maximum≤ .514 mg/LJun–Oct001
Zinc, dissolved [as Zn]daily maximum≤ .553 mg/LJan, Feb, Nov, Dec001
Selenium, dissolved [as Se]monthly averagereport only (mg/L)all year001
Selenium, dissolved [as Se]daily maximumreport only (mg/L)all year001
E. coli, MTEC-MFmonthly geometric mean≤ 126 #/100mLMay–Sep001
E. coli, MTEC-MFdaily maximum≤ 298 #/100mLMay–Sep001
Flow, in conduit or thru treatment plantmonthly averagereport only (MGD)all year001
Flow, in conduit or thru treatment plantdaily maximumreport only (MGD)all year001
Toxicity [acute], Ceriodaphnia dubiavalue≤ 1 tox acuteall year001
Toxicity [acute], Pimephales promelas [Fathead Minnow]value≤ 1 tox acuteall year001
Solids, total dissolvedvaluereport only (mg/L)all year001
Solids, total dissolvedminimum valuereport only (mg/L)all year001
Mercury, total [as Hg]monthly averagereport only (mg/L)all year001
Mercury, total [as Hg]daily maximumreport only (mg/L)all year001
BOD, carbonaceous [5 day, 20 C]monthly average≤ 25 mg/Lall year001
BOD, carbonaceous [5 day, 20 C]weekly average≤ 40 mg/Lall year001
BOD, carbonaceous [5 day, 20 C]monthly average≤ 83.3 kg/dall year001
BOD, carbonaceous [5 day, 20 C]weekly average≤ 133.2 kg/dall year001
pHvaluereport only (SU)all yearINF
Solids, total suspendedvaluereport only (mg/L)all yearINF
Flow, in conduit or thru treatment plantvaluereport only (MGD)all yearINF
BOD, carbonaceous [5 day, 20 C]valuereport only (mg/L)all yearINF
pHvaluereport only (SU)all yearSLG
Nitrate nitrogen, dry weightvaluereport only (mg/kg)all yearSLG
Selenium, sludge, total, dry weight [as Se]valuereport only (mg/kg)all yearSLG
Arsenic total, dry weight, sludgevaluereport only (mg/kg)all yearSLG
Molybdenum, sludge, total, dry weight [as Mo]valuereport only (mg/kg)all yearSLG
Zinc, sludge, total, dry weight [as Zn]valuereport only (mg/kg)all yearSLG
Lead, sludge, total, dry weight [as Pb]valuereport only (mg/kg)all yearSLG
Nickel, sludge, total, dry weight [as Ni]valuereport only (mg/kg)all yearSLG
Nitrogen, sludge, total, dry weight [as N]valuereport only (mg/kg)all yearSLG
Mercury, sludge, total, dry weight [as Hg]valuereport only (mg/kg)all yearSLG
Chromium, sludge, total, dry weight [as Cr]valuereport only (mg/kg)all yearSLG
Copper, sludge, total, dry weight [as Cu]valuereport only (mg/kg)all yearSLG
Cadmium, sludge, total, dry weight [as Cd]valuereport only (mg/kg)all yearSLG
Solids, sludge, total, dry weightvaluereport only (kg)all yearSLG
Nitrogen, ammonia, sludge, tot dry wgtvaluereport only (mg/kg)all yearSLG

How strict are these limits?

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

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On EPA ECHO: Facility report · DMR history

Your permit document is the final word. As JSON: /api/v1/permits/NE0040045 · MCP: https://passage-data.com/mcp