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Attica Water Treatment Plant

Water Supply, Attica, Ohio. NPDES permit OH0141861, in force until Sep 30, 2029. Last 12 months: over a limit 9 times (last August 2026). Source: EPA ECHO, Oct 22, 2026.

Reports due: About 20 days after each period: form A monthly (13 values)
Last report on file: August 2026
Oct 2024 – Sep 2025: 16 values over a limit, 44 required values missing, 3 of 12 reports late

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

Period ending	Parameter	Reported	Limit	Over by
December 2025	Iron, suspended, monthly average	1120	≤ 1000 ug/L	12%
February 2026	Iron, suspended, daily maximum	9950	≤ 2000 ug/L	398%
February 2026	Iron, suspended, monthly average	9423	≤ 1000 ug/L	842%
April 2026	Iron, suspended, daily maximum	3280	≤ 2000 ug/L	64%
April 2026	Iron, suspended, monthly average	2110	≤ 1000 ug/L	111%
May 2026	Iron, suspended, monthly average	1440	≤ 1000 ug/L	44%
July 2026	Iron, suspended, monthly average	1230	≤ 1000 ug/L	23%
August 2026	Iron, suspended, daily maximum	9820	≤ 2000 ug/L	391%
August 2026	Iron, suspended, monthly average	7890	≤ 1000 ug/L	689%

Limits in force (13)

Parameter	Statistic	Limit	Months
Flow rate	monthly average	report only (gal/d)	all year
Flow rate	daily maximum	report only (gal/d)	all year
pH	daily minimum	≥ 6.5 SU	all year
pH	daily maximum	≤ 9 SU	all year
Solids, total suspended	monthly average	≤ 30 mg/L	all year
Solids, total suspended	daily maximum	≤ 45 mg/L	all year
Iron, suspended	monthly average	≤ 1000 ug/L	all year
Iron, suspended	daily maximum	≤ 2000 ug/L	all year
Manganese, suspended	monthly average	≤ 1000 ug/L	all year
Manganese, suspended	daily maximum	≤ 2000 ug/L	all year
Chlorine, total residual	daily maximum	≤ .019 mg/L	all year
Microcystin	monthly average	report only (ug/L)	all year
Microcystin	daily maximum	report only (ug/L)	all year

How strict are these limits?

Chlorine, total residual, daily maximum .019 mg/L — stricter than 27% of 877 other minor industrial and other permits in Ohio; 72% have the same limit
Solids, total suspended, daily maximum 45 mg/L — stricter than 16% of 559 other minor industrial and other permits in Ohio; 66% have the same limit

Cited limits by parameter: Ohio's rules and the federal ones.

Same industry: the 147 Water Supply permits in Ohio.

Check this month's numbers Email me before each report is due

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On EPA ECHO: Facility report · DMR history

Your permit document is the final word. As JSON: /api/v1/permits/OH0141861 · MCP: https://passage-data.com/mcp