Lawrence, City of — NPDES permit KS0038644: limits, due date and EPA's record

Sewage treatment plant, major discharger, Lawrence, Kansas. NPDES permit KS0038644, in force until Jul 31, 2029. Last 12 months: over a limit 3 times (last July 2026). Source: EPA ECHO, Oct 22, 2026.

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

Period ending	Parameter	Reported	Limit	Over by
December 2025	Nitrogen, ammonia total [as N], daily maximum	23.526 mg/L	≤ 17.4 mg/L	35%
January 2026	Solids, total suspended, maximum weekly average	102.25 mg/L	≤ 45 mg/L	127%
July 2026	Chlorine, total residual, daily maximum	400 ug/L	≤ 100 ug/L	300%

Limits in force (91)

Parameter	Statistic	Limit	Months	Outfall
Conductivity	monthly average	report only (umho/cm)	all year	001
Oxygen, dissolved [DO]	monthly average	report only (mg/L)	all year	001
BOD, nitrogen inhib 5-day [20 deg. C]	monthly average	≤ 25 mg/L	all year	001
BOD, nitrogen inhib 5-day [20 deg. C]	maximum weekly average	≤ 40 mg/L	all year	001
pH	daily minimum	≥ 6 SU	all year	001
pH	monthly average	report only (SU)	all year	001
pH	daily maximum	≤ 9 SU	all year	001
Solids, total suspended	monthly average	≤ 30 mg/L	all year	001
Solids, total suspended	maximum weekly average	≤ 45 mg/L	all year	001
Nitrogen, total [as N]	monthly average	report only (mg/L)	all year	001
Nitrogen, total [as N]	monthly average	report only (lb/d)	all year	001
Nitrogen, ammonia total [as N]	monthly average	≤ 12.9 mg/L	Apr	001
Nitrogen, ammonia total [as N]	monthly average	≤ 6.1 mg/L	Sep	001
Nitrogen, ammonia total [as N]	monthly average	≤ 17.4 mg/L	Jan	001
Nitrogen, ammonia total [as N]	monthly average	≤ 4.6 mg/L	Aug	001
Nitrogen, ammonia total [as N]	monthly average	≤ 8.7 mg/L	May	001
Nitrogen, ammonia total [as N]	monthly average	report only (mg/L)	all year	001
Nitrogen, ammonia total [as N]	monthly average	≤ 17.4 mg/L	Feb	001
Nitrogen, ammonia total [as N]	monthly average	≤ 16.9 mg/L	Nov	001
Nitrogen, ammonia total [as N]	monthly average	≤ 6 mg/L	Jun	001
Nitrogen, ammonia total [as N]	monthly average	≤ 17.4 mg/L	Dec	001
Nitrogen, ammonia total [as N]	monthly average	≤ 10.5 mg/L	Oct	001
Nitrogen, ammonia total [as N]	monthly average	≤ 17.4 mg/L	Mar	001
Nitrogen, ammonia total [as N]	monthly average	≤ 4.2 mg/L	Jul	001
Nitrogen, ammonia total [as N]	daily maximum	≤ 15.1 mg/L	Apr	001
Nitrogen, ammonia total [as N]	daily maximum	≤ 6.6 mg/L	Sep	001
Nitrogen, ammonia total [as N]	daily maximum	≤ 17.4 mg/L	Jan	001
Nitrogen, ammonia total [as N]	daily maximum	≤ 4.9 mg/L	Aug	001
Nitrogen, ammonia total [as N]	daily maximum	≤ 9.7 mg/L	May	001
Nitrogen, ammonia total [as N]	daily maximum	≤ 17.4 mg/L	Feb	001
Nitrogen, ammonia total [as N]	daily maximum	≤ 17.4 mg/L	Nov	001
Nitrogen, ammonia total [as N]	daily maximum	≤ 6.5 mg/L	Jun	001
Nitrogen, ammonia total [as N]	daily maximum	≤ 17.4 mg/L	Dec	001
Nitrogen, ammonia total [as N]	daily maximum	≤ 11.9 mg/L	Oct	001
Nitrogen, ammonia total [as N]	daily maximum	≤ 17.4 mg/L	Mar	001
Nitrogen, ammonia total [as N]	daily maximum	≤ 4.5 mg/L	Jul	001
Nitrogen, Kjeldahl, total [as N]	monthly average	report only (mg/L)	all year	001
Nitrite + Nitrate total [as N]	monthly average	report only (mg/L)	all year	001
Phosphorus, total [as P]	monthly average	report only (mg/L)	all year	001
Phosphorus, total [as P]	monthly average	report only (lb/d)	all year	001
Hardness, total [as CaCO3]	monthly average	report only (mg/L)	all year	001
Arsenic, total recoverable	monthly average	report only (ug/L)	all year	001
Selenium, total recoverable	monthly average	report only (ug/L)	all year	001
Thallium, total recoverable	monthly average	report only (ug/L)	all year	001
Beryllium, total recoverable [as Be]	monthly average	report only (ug/L)	all year	001
Nickel, total recoverable	monthly average	report only (ug/L)	all year	001
Silver total recoverable	monthly average	report only (ug/L)	all year	001
Zinc, total recoverable	monthly average	report only (ug/L)	all year	001
Cadmium, total recoverable	monthly average	report only (ug/L)	all year	001
Lead, total recoverable	monthly average	report only (ug/L)	all year	001
Chromium, total recoverable	monthly average	report only (ug/L)	all year	001
Copper, total recoverable	monthly average	report only (ug/L)	all year	001
Antimony, total recoverable	monthly average	report only (ug/L)	all year	001
Priority Pollutants	monthly average	report only (mg/L)	all year	001
Flow, in conduit or thru treatment plant	monthly average	report only (MGD)	all year	001
Chlorine, total residual	daily maximum	≤ 100 ug/L	all year	001
E. coli	monthly geometric mean	≤ 200 #/100mL	Jun	001
E. coli	monthly geometric mean	≤ 200 #/100mL	Jul	001
E. coli	monthly geometric mean	≤ 2000 #/100mL	Dec	001
E. coli	monthly geometric mean	≤ 2000 #/100mL	Jan	001
E. coli	monthly geometric mean	≤ 200 #/100mL	Apr	001
E. coli	monthly geometric mean	≤ 2000 #/100mL	Nov	001
E. coli	monthly geometric mean	≤ 200 #/100mL	Oct	001
E. coli	monthly geometric mean	≤ 2000 #/100mL	Mar	001
E. coli	monthly geometric mean	≤ 200 #/100mL	Sep	001
E. coli	monthly geometric mean	≤ 200 #/100mL	Aug	001
E. coli	monthly geometric mean	≤ 200 #/100mL	May	001
E. coli	monthly geometric mean	≤ 2000 #/100mL	Feb	001
E. coli	weekly geometric mean	≤ 4348 #/100mL	Jun	001
E. coli	weekly geometric mean	≤ 4348 #/100mL	Jul	001
E. coli	weekly geometric mean	report only (#/100mL)	Dec	001
E. coli	weekly geometric mean	report only (#/100mL)	Jan	001
E. coli	weekly geometric mean	≤ 4348 #/100mL	Apr	001
E. coli	weekly geometric mean	report only (#/100mL)	Nov	001
E. coli	weekly geometric mean	≤ 4348 #/100mL	Oct	001
E. coli	weekly geometric mean	report only (#/100mL)	Mar	001
E. coli	weekly geometric mean	≤ 4348 #/100mL	Sep	001
E. coli	weekly geometric mean	≤ 4348 #/100mL	Aug	001
E. coli	weekly geometric mean	≤ 4348 #/100mL	May	001
E. coli	weekly geometric mean	report only (#/100mL)	Feb	001
Nitrogen, Total As N	daily average	report only (mg/L)	all year	001
Nitrogen, Total As N	EPA's "DPD AVG"	report only (lb/d)	all year	001
Phosphorus, Total As P	daily average	report only (mg/L)	all year	001
Phosphorus, Total As P	EPA's "DPD AVG"	report only (lb/d)	all year	001
Mercury, total [as Hg]	monthly average	report only (ug/L)	all year	001
IC25 Static Renewal 7 Day Chronic Ceriodaphnia dubia	daily minimum	≥ 10 %	all year	001
IC25 Static Renewal 7 Day Chronic Pimephales	daily minimum	≥ 10 %	all year	001
BOD, 5-day, 20 deg. C	monthly average	report only (mg/L)	all year	002
Solids, total suspended	monthly average	report only (mg/L)	all year	002
Nitrogen, Kjeldahl, total [as N]	monthly average	report only (mg/L)	all year	002
Phosphorus, total [as P]	monthly average	report only (mg/L)	all year	002

New limits from Jan 1, 2028

Parameter	New limit	New or tighter	Median, last 12 months	× new limit
Phosphorus, Total As P, EPA's "DPD AVG"	104.4 lb/d	new	188 lb/d (11 values)	1.8×

How strict are these limits?

Your permit document is the final word. As JSON: /api/v1/permits/KS0038644 · MCP: https://passage-data.com/mcp