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World War II Memorial

Amusement Parks, Washington, the District of Columbia. NPDES permit DC0000345, in force until Feb 28, 2029. Last 12 months: over a limit 2 times (last March 2026), 2 required values missing, 4 of 12 reports late. Source: EPA ECHO, Oct 22, 2026.

Reports due: About 28 days after each period: form A monthly (14 values)
Last report on file: September 2026
Oct 2024 – Sep 2025: 4 values over a limit, 19 required values missing, 11 of 12 reports late

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

Period ending	Parameter	Reported	Limit	Over by
February 2026	pH, maximum	8.85 SU	≤ 8.5 SU	—
March 2026	Iron, total [as Fe], monthly average	1.74 mg/L	≤ 1.3 mg/L	34%

Limits in force (14)

Parameter	Statistic	Limit	Months
pH	minimum	≥ 6 SU	all year
pH	maximum	≤ 8.5 SU	all year
Solids, total suspended	monthly average	≤ 30 mg/L	all year
Solids, total suspended	daily maximum	≤ 60 mg/L	all year
Oil & Grease	monthly average	≤ 10 mg/L	all year
Oil & Grease	daily maximum	≤ 15 mg/L	all year
Iron, total [as Fe]	monthly average	≤ 1.3 mg/L	all year
Iron, total [as Fe]	daily maximum	≤ 4.2 mg/L	all year
Flow, in conduit or thru treatment plant	monthly average	report only (gal/d)	all year
Flow, in conduit or thru treatment plant	daily maximum	report only (gal/d)	all year
Chlorine, total residual	monthly average	≤ .1 mg/L	all year
Chlorine, total residual	daily maximum	≤ .1 mg/L	all year
E. coli	monthly average	report only (MPN/100mL)	all year
E. coli	daily maximum	report only (MPN/100mL)	all year

New limits from Mar 1, 2027

Parameter	New limit	New or tighter	Median, last 12 months	× new limit
E. coli, daily maximum	400 MPN/100mL	new	57.35 MPN/100mL (12 values)	0.143×
E. coli, monthly average	126 MPN/100mL	new	57.35 MPN/100mL (12 values)	0.455×

How strict are these limits?

pH, maximum 8.5 SU — stricter than 86% of 6,634 other minor industrial and other permits nationwide; 12% have the same limit
Iron, total [as Fe], monthly average 1.3 mg/L — stricter than 81% of 2,303 other minor industrial and other permits nationwide
Iron, total [as Fe], daily maximum 4.2 mg/L — stricter than 48% of 1,411 other minor industrial and other permits nationwide

Cited limits by parameter: the District of Columbia's rules and the federal ones.

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Your permit document is the final word. As JSON: /api/v1/permits/DC0000345 · MCP: https://passage-data.com/mcp