The United States Department of Interior National Park Service — NPDES permit CO0034622: limits, due date and EPA's record

Federal facility (Water Supply), Mesa Verde, Colorado. NPDES permit CO0034622 expired Dec 31, 2025; its limits still apply. Last 12 months: no values over a limit. Source: EPA ECHO, Oct 22, 2026.

Limits in force (23)

Parameter	Statistic	Limit	Months	Outfall
pH	minimum	≥ 6.5 SU	all year	001
pH	maximum	≤ 9 SU	all year	001
Solids, total suspended	30-day average	≤ 30 mg/L	all year	001
Solids, total suspended	7-day average	≤ 45 mg/L	all year	001
Oil & Grease	daily maximum	≤ 10 mg/L	all year	001
Chlorine, total residual	30-day average	≤ .011 mg/L	all year	001
Chlorine, total residual	daily maximum	≤ .019 mg/L	all year	001
Volume	total	report only (Mgal/qtr)	all year	001
Solids, total dissolved	daily maximum	report only (mg/L)	all year	001
Flow	30-day average	≤ .014 MGD	all year	001
Oil and grease visual	instantaneous maximum	report only (N=0;Y=1)	all year	001
pH	minimum	≥ 6.5 SU	all year	002
pH	maximum	≤ 9 SU	all year	002
Solids, total suspended	30-day average	≤ 30 mg/L	all year	002
Solids, total suspended	7-day average	≤ 45 mg/L	all year	002
Oil & Grease	daily maximum	≤ 10 mg/L	all year	002
Chlorine, total residual	30-day average	≤ .011 mg/L	all year	002
Chlorine, total residual	daily maximum	≤ .019 mg/L	all year	002
Volume	total	report only (Mgal/qtr)	all year	002
Solids, total dissolved	daily maximum	report only (mg/L)	all year	002
Flow	30-day average	≤ .014 MGD	all year	002
Oil and grease visual	instantaneous maximum	report only (N=0;Y=1)	all year	002
Solids, total dissolved	annual mass load	≤ 366 ton/yr	all year	SUM

How strict are these limits?

Your permit document is the final word. As JSON: /api/v1/permits/CO0034622 · MCP: https://passage-data.com/mcp