Non-Compliance Clean Water Act

MAYNARD WASTEWATER TREATMENT FACILITY

Quick Summary

•Currently out of compliance in at least one environmental program (CAA, CWA, or RCRA).
•Assessed $0 in total penalties since records began.

Address: 18 PINE HILL RD
MAYNARD, MA 01754
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County: MIDDLESEX County
Total Penalties: $0
Registry ID: 110070946000

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.

Water (CWA)
Qtrs Non-Compliant

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
LC50 Static 48Hr Acute Pimephales promelas	DMR, Limited - Numeric Violation	77.40 %	100.00	+23%	Dec 2025	Open
Nitrogen, ammonia total [as N]	DMR, Limited - Numeric Violation	15.40 mg/L	12.00	+28%	Sep 2025	Open
E. coli	DMR, Limited - Numeric Violation	1,300.00 MPN/100mL	409.00	+218%	Aug 2025	Open
LC50 Static 48Hr Acute Ceriodaphnia dubia	DMR, Limited - Numeric Violation	48.00 %	100.00	+52%	Dec 2024	Open
LC50 Static 48Hr Acute Ceriodaphnia dubia	DMR, Limited - Numeric Violation	46.70 %	100.00	+53%	Sep 2024	Open
LC50 Static 48Hr Acute Ceriodaphnia dubia	DMR, Limited - Numeric Violation	51.80 %	100.00	+48%	Jun 2024	Open
LC50 Static 48Hr Acute Ceriodaphnia dubia	DMR, Limited - Numeric Violation	70.00 %	100.00	+30%	Sep 2023	Open

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