HARRIS COUNTY MUD 150 WWTP

Address

11621 C WALTERS ROAD
HOUSTON, TX 77056
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County

HARRIS County

Inspections

2 · last Feb 10, 2025

Total Penalties

$0 · last Mar 4, 2016

Registry ID

110002044118

Compliance Status (Last 12 Quarters)

Number of calendar quarters, out of the last 12, in which this facility was in violation of its permit. Zero means no recorded violations in that program over the past three years.

3

Water (CWA)
Qtrs Non-Compliant

Compliance Violations

Individual permit violations recorded by the EPA across air, water, and hazardous waste programs. Open violations are unresolved as of the most recent ECHO data update.

Program	Type	Violation Date	Return to Compliance	Status
cwa	Permit Violations - Violation Specified in Comment	Feb 10, 2025	Feb 10, 2025	Resolved
cwa	Permit Violations - Violation Specified in Comment	Mar 23, 2023	Apr 15, 2023	Resolved
cwa	Permit Violations - Violation Specified in Comment	Sep 17, 2015	—	Open
cwa	Permit Violations - Violation Specified in Comment	Sep 12, 2013	—	Open
cwa	Schedule Event achieved late but reported	Oct 30, 1995	—	Open
cwa	Effluent Violations - Unapproved Bypass	Feb 3, 1994	—	Open
cwa	Reporting Violations - Noncompliance with Section 308 Information Request	Sep 5, 1991	—	Open

Discharge Limit Exceedances

Instances where this facility's reported discharge monitoring results exceeded its permitted limits under the Clean Water Act. Exceedance percentage shows how far over the permit limit the discharge was.

Pollutant	Violation	Reported	Limit	Exceedance	Period	Status
E. coli	DMR, Limited - Numeric Violation	2,420.00 MPN/100mL	200.00	+1,110%	Feb 2026	Open
E. coli	DMR, Limited - Numeric Violation	2,420.00 MPN/100mL	200.00	+1,110%	Jan 2026	Open
E. coli	DMR, Limited - Numeric Violation	517.00 MPN/100mL	200.00	+159%	Nov 2025	Open
Nitrogen, ammonia total [as N]	DMR, Limited - Numeric Violation	10.60 mg/L	10.00	+6%	Jul 2024	Open
Flow, in conduit or thru treatment plant	DMR, Limited - Numeric Violation	4,861.00 MGD	4,556.00	+7%	Sep 2020	Open
E. coli	DMR, Limited - Numeric Violation	275.00 MPN/100mL	200.00	+38%	Jul 2020	Open
E. coli	DMR, Limited - Numeric Violation	234.00 MPN/100mL	200.00	+17%	Sep 2019	Open
Flow, in conduit or thru treatment plant	DMR, Limited - Numeric Violation	5,416.00 MGD	4,556.00	+19%	Sep 2019	Open
E. coli	DMR, Limited - Numeric Violation	3,470.00 MPN/100mL	200.00	+1,635%	Oct 2018	Open
E. coli	DMR, Limited - Numeric Violation	4,840.00 MPN/100mL	200.00	+2,320%	Mar 2018	Open
Flow, in conduit or thru treatment plant	DMR, Limited - Numeric Violation	5,903.00 MGD	4,556.00	+30%	Aug 2017	Open
E. coli	DMR, Limited - Numeric Violation	3,110.00 MPN/100mL	200.00	+1,455%	Oct 2015	Open
E. coli	DMR, Limited - Numeric Violation	651.00 MPN/100mL	200.00	+226%	May 2015	Open

Enforcement Actions

Formal enforcement cases brought by the EPA or state agencies, including administrative orders and civil penalties assessed. Penalty amounts reflect what was formally assessed, not necessarily what was collected.

State CWA Penalty AO

Clean Water Act · Case TX-2015-0172-MWD-E · Mar 4, 2016

$12,375

State CWA Non Penalty AO

Clean Water Act · Case TX-N00004058 · Jan 28, 2002

State CWA Non Penalty AO

Clean Water Act · Case TX-N00003428 · Oct 20, 2000

CWA 309A AO For Compliance

Clean Water Act · Case 06-1995-N431 · Sep 28, 1995

CWA 309A AO For Compliance

Clean Water Act · Case 06-1990-N560 · Dec 6, 1989

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