Louisville Zoological Garden — NPDES permit KY0057061: limits, due date and EPA's record

Louisville Zoological Garden

Botanical And Zoological Gardens, Louisville, Kentucky. NPDES permit KY0057061, in force until Sep 30, 2030. Last 12 months: over a limit 40 times (last August 2026), 18 of 28 reports late. Source: EPA ECHO, Oct 22, 2026.

Reports due

About 28 days after each period: outfall 001 form 1 monthly (8 values), outfall 002 form 1 monthly (8 values), outfall 001 form 2 quarterly, outfall 002 form 2 quarterly

Last report on file

August 2026

Oct 2024 – Sep 2025

0 values over a limit, 0 required values missing, 12 of 32 reports late

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

All 40 values over a limit

Period ending	Outfall	Parameter	Reported	Limit	Over by
October 2025	001	Chlorine, total residual, daily maximum	.78 mg/L	≤ .019 mg/L	4005%
October 2025	001	Chlorine, total residual, monthly average	.78 mg/L	≤ .011 mg/L	6991%
October 2025	002	Chlorine, total residual, daily maximum	.03 mg/L	≤ .019 mg/L	58%
October 2025	002	Chlorine, total residual, monthly average	.03 mg/L	≤ .011 mg/L	173%
November 2025	001	Chlorine, total residual, daily maximum	.5 mg/L	≤ .019 mg/L	2532%
November 2025	001	Chlorine, total residual, monthly average	.5 mg/L	≤ .011 mg/L	4445%
November 2025	002	Chlorine, total residual, daily maximum	.02 mg/L	≤ .019 mg/L	5%
November 2025	002	Chlorine, total residual, monthly average	.02 mg/L	≤ .011 mg/L	82%
December 2025	001	Chlorine, total residual, daily maximum	.31 mg/L	≤ .019 mg/L	1532%
December 2025	001	Chlorine, total residual, monthly average	.31 mg/L	≤ .011 mg/L	2718%
December 2025	002	Chlorine, total residual, daily maximum	.1 mg/L	≤ .019 mg/L	426%
December 2025	002	Chlorine, total residual, monthly average	.1 mg/L	≤ .011 mg/L	809%
January 2026	001	Chlorine, total residual, daily maximum	.66 mg/L	≤ .019 mg/L	3374%
January 2026	001	Chlorine, total residual, monthly average	.66 mg/L	≤ .011 mg/L	5900%
February 2026	001	Chlorine, total residual, daily maximum	1.12 mg/L	≤ .019 mg/L	5795%
February 2026	001	Chlorine, total residual, monthly average	1.12 mg/L	≤ .011 mg/L	10082%
March 2026	001	Chlorine, total residual, daily maximum	.93 mg/L	≤ .019 mg/L	4795%
March 2026	001	Chlorine, total residual, monthly average	.93 mg/L	≤ .011 mg/L	8355%
March 2026	002	Chlorine, total residual, daily maximum	.06 mg/L	≤ .019 mg/L	216%
March 2026	002	Chlorine, total residual, monthly average	.06 mg/L	≤ .011 mg/L	445%
April 2026	001	Chlorine, total residual, daily maximum	.19 mg/L	≤ .019 mg/L	900%
April 2026	001	Chlorine, total residual, monthly average	.19 mg/L	≤ .011 mg/L	1627%
April 2026	002	Chlorine, total residual, daily maximum	.14 mg/L	≤ .019 mg/L	637%
April 2026	002	Chlorine, total residual, monthly average	.14 mg/L	≤ .011 mg/L	1173%
May 2026	001	Chlorine, total residual, daily maximum	.41 mg/L	≤ .019 mg/L	2058%
May 2026	001	Chlorine, total residual, monthly average	.41 mg/L	≤ .011 mg/L	3627%
May 2026	002	Chlorine, total residual, daily maximum	.16 mg/L	≤ .019 mg/L	742%
May 2026	002	Chlorine, total residual, monthly average	.16 mg/L	≤ .011 mg/L	1355%
June 2026	001	Chlorine, total residual, daily maximum	.39 mg/L	≤ .019 mg/L	1953%
June 2026	001	Chlorine, total residual, monthly average	.39 mg/L	≤ .011 mg/L	3445%
June 2026	002	Chlorine, total residual, daily maximum	.08 mg/L	≤ .019 mg/L	321%
June 2026	002	Chlorine, total residual, monthly average	.08 mg/L	≤ .011 mg/L	627%
July 2026	001	Chlorine, total residual, daily maximum	.08 mg/L	≤ .019 mg/L	321%
July 2026	001	Chlorine, total residual, monthly average	.08 mg/L	≤ .011 mg/L	627%
July 2026	002	Chlorine, total residual, daily maximum	.09 mg/L	≤ .019 mg/L	374%
July 2026	002	Chlorine, total residual, monthly average	.09 mg/L	≤ .011 mg/L	718%
August 2026	001	Chlorine, total residual, daily maximum	.3 mg/L	≤ .019 mg/L	1479%
August 2026	001	Chlorine, total residual, monthly average	.3 mg/L	≤ .011 mg/L	2627%
August 2026	002	Chlorine, total residual, daily maximum	.11 mg/L	≤ .019 mg/L	479%
August 2026	002	Chlorine, total residual, monthly average	.11 mg/L	≤ .011 mg/L	900%

Limits in force (34)

Parameter	Statistic	Limit	Months	Outfall
Oxygen, dissolved [DO]	instantaneous minimum	≥ 7 mg/L	all year	001
pH	minimum	≥ 6 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, ammonia total [as N]	monthly average	≤ 2 mg/L	all year	001
Nitrogen, ammonia total [as N]	monthly average	≤ 5 mg/L	all year	001
Nitrogen, ammonia total [as N]	daily maximum	≤ 3 mg/L	all year	001
Nitrogen, ammonia total [as N]	daily maximum	≤ 7.5 mg/L	all year	001
Flow, in conduit or thru treatment plant	monthly average	report only (MGD)	all year	001
Flow, in conduit or thru treatment plant	daily maximum	report only (MGD)	all year	001
Chlorine, total residual	monthly average	≤ .011 mg/L	all year	001
Chlorine, total residual	daily maximum	≤ .019 mg/L	all year	001
E. coli	30-day geometric mean	≤ 130 #/100mL	all year	001
E. coli	7-day geometric mean	≤ 240 #/100mL	all year	001
BOD, carbonaceous [5 day, 20 C]	monthly average	≤ 10 mg/L	all year	001
BOD, carbonaceous [5 day, 20 C]	maximum weekly average	≤ 15 mg/L	all year	001
Oxygen, dissolved [DO]	instantaneous minimum	≥ 7 mg/L	all year	002
pH	minimum	≥ 6 SU	all year	002
pH	daily maximum	≤ 9 SU	all year	002
Solids, total suspended	monthly average	≤ 30 mg/L	all year	002
Solids, total suspended	maximum weekly average	≤ 45 mg/L	all year	002
Nitrogen, ammonia total [as N]	monthly average	≤ 2 mg/L	all year	002
Nitrogen, ammonia total [as N]	monthly average	≤ 5 mg/L	all year	002
Nitrogen, ammonia total [as N]	daily maximum	≤ 3 mg/L	all year	002
Nitrogen, ammonia total [as N]	daily maximum	≤ 7.5 mg/L	all year	002
Flow, in conduit or thru treatment plant	monthly average	report only (MGD)	all year	002
Flow, in conduit or thru treatment plant	daily maximum	report only (MGD)	all year	002
Chlorine, total residual	monthly average	≤ .011 mg/L	all year	002
Chlorine, total residual	daily maximum	≤ .019 mg/L	all year	002
E. coli	30-day geometric mean	≤ 130 #/100mL	all year	002
E. coli	7-day geometric mean	≤ 240 #/100mL	all year	002
BOD, carbonaceous [5 day, 20 C]	monthly average	≤ 10 mg/L	all year	002
BOD, carbonaceous [5 day, 20 C]	maximum weekly average	≤ 15 mg/L	all year	002

How strict are these limits?

Nitrogen, ammonia total [as N], monthly average 2 mg/L — stricter than 88% of 296 other minor industrial and other permits in Kentucky; 11% have the same limit

Nitrogen, ammonia total [as N], daily maximum 3 mg/L — stricter than 88% of 435 other minor industrial and other permits in Kentucky; 11% have the same limit

BOD, carbonaceous [5 day, 20 C], maximum weekly average 15 mg/L — stricter than 87% of 323 other minor industrial and other permits in Kentucky; 13% have the same limit

Your permit document is the final word. As JSON: /api/v1/permits/KY0057061 · MCP: https://passage-data.com/mcp