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Non-Transient Non-Community Water System · PWS MA3051011

Assurance Technology Corp.

Carlisle, Massachusetts 01741 - drinking water served from groundwater sources to 75 people, tracked in EPA SDWIS and UCMR5.

75
People served
104
EPA violations
15
Health-based
Untested
UCMR5 result

The verdict

EPA records 104 drinking-water violations at Assurance Technology Corp., 14% of them health-based - above the Massachusetts per-system average.

104
Total EPA violations on record
14%
Health-based (MCL / treatment failure)
75
People served by this system
N/A
PFAS compounds detected (UCMR5)

Water Quality Snapshot: Assurance Technology Corp.

Assurance Technology Corp. is a private-owned non-transient non-community water system that delivers drinking water to 75 residents in Carlisle, Massachusetts (Middlesex County) through 1 service connections. Its water is drawn from groundwater sources. EPA's Safe Drinking Water Information System records 104 total violations for this system , of which 15 (14%) are health-based, meaning a contaminant exceeded an EPA Maximum Contaminant Level or a required treatment technique failed. A further 85 monitoring and reporting violations are on file. The most recent violation on record dates to 2023.

The most frequently cited contaminant at this system is Lead and Copper Rule, recorded in 13 violations (TT, health-based). This system has not yet been sampled under EPA's UCMR5 PFAS monitoring program, so no PFAS detection data is available here.

Across Massachusetts, EPA tracks 1,599 public water systems serving 10,332,845 people, with 73,886 cumulative violations and 7,389 health-based violations on record. About 95% of systems in the state carry at least one violation, and state-wide the average per system is 46.2 violations. Statewide, 143 of 263 UCMR5-tested systems have reported PFAS detections (54.4%).

Assurance Technology Corp.'s 104 violations sit above the Massachusetts average.

All figures above are sourced directly from EPA SDWIS and UCMR5 public data releases and are updated as EPA publishes new reporting cycles.

Population Served
75
Total Violations
104
Health-Based Violations
15
Water Source
Groundwater

System Details

System Type
Non-Transient Non-Community
Owner Type
Private
Connections
1
County
Middlesex
School/Daycare
No
MCL Violations
2
Monitoring Violations
85
Treatment Tech Violations
13

Violation History

Contaminant violations recorded by EPA.

Contaminant Category Count Latest
Lead and Copper Rule TT 13 2023
Lead and Copper Rule MR 7 2005
Coliform (TCR) MR 5 2009
Carbofuran MR 2 2009
Chlordane MR 2 2009
ETHYLENE DIBROMIDE MR 2 2009
Heptachlor MR 2 2009
Toxaphene MR 2 2009
Methoxychlor MR 2 2009
BHC-GAMMA MR 2 2009
Total Polychlorinated Biphenyls (PCB) MR 2 2009
Benzo(a)pyrene MR 2 2009
Di(2-ethylhexyl) phthalate MR 2 2009
Dinoseb MR 2 2009
Diquat MR 2 2009
Glyphosate MR 2 2009
HEXACHLOROBENZENE MR 2 2009
1,2-DIBROMO-3-CHLOROPROPANE MR 2 2009
Hexachlorocyclopentadiene MR 2 2009
Heptachlor epoxide MR 2 2009
Di(2-ethylhexyl) adipate MR 2 2009
Coliform (TCR) MCL 2 2010
Atrazine MR 2 2009
Pentachlorophenol MR 2 2009
Endrin MR 2 2009
Picloram MR 2 2009
Endothall MR 2 2009
Simazine MR 2 2009
LASSO MR 2 2009
OXAMYL MR 2 2009

Verify This Water System

The figures above are aggregated from EPA's public databases. To verify the underlying records, or to file a complaint, request a Consumer Confidence Report, or check current monitoring status, go directly to the federal and state regulators that enforce the Safe Drinking Water Act for Assurance Technology Corp..

Federal Source of Truth

EPA SDWIS, Federal Reports

EPA's Safe Drinking Water Information System (SDWIS) holds the federal compliance record for every regulated public water system. Open the system-level report by PWS ID:

View PWS ID MA3051011 on SDWIS

Source: EPA SDWIS Federal Reports Search

State Regulator

Massachusetts Drinking Water Authority

MassDEP, Drinking Water Program is the primacy agency that licenses and inspects Assurance Technology Corp. under EPA-delegated authority.

Open MA regulator portal

Source: MassDEP, Drinking Water Program

Violation Timeline

Each row links to the EPA SDWIS public record for verification. Cross-reference the contaminant code on EPA's federal report to see violation dates, return-to-compliance status, and enforcement actions.

Year (latest) Contaminant Category Count EPA Record
2023 Lead and Copper Rule TT 13 SDWIS / MA3051011 / 5000
2010 Coliform (TCR) MCL 2 SDWIS / MA3051011 / 3100
2009 Coliform (TCR) MR 5 SDWIS / MA3051011 / 3100
2009 Carbofuran MR 2 SDWIS / MA3051011 / 2046
2009 Chlordane MR 2 SDWIS / MA3051011 / 2959
2009 ETHYLENE DIBROMIDE MR 2 SDWIS / MA3051011 / 2946
2009 Heptachlor MR 2 SDWIS / MA3051011 / 2065
2009 Toxaphene MR 2 SDWIS / MA3051011 / 2020
2009 Methoxychlor MR 2 SDWIS / MA3051011 / 2015
2009 BHC-GAMMA MR 2 SDWIS / MA3051011 / 2010
2009 Total Polychlorinated Biphenyls (PCB) MR 2 SDWIS / MA3051011 / 2383
2009 Benzo(a)pyrene MR 2 SDWIS / MA3051011 / 2306
2009 Di(2-ethylhexyl) phthalate MR 2 SDWIS / MA3051011 / 2039
2009 Dinoseb MR 2 SDWIS / MA3051011 / 2041
2009 Diquat MR 2 SDWIS / MA3051011 / 2032

How Assurance Technology Corp. Compares

Cross-reference this system's record against state averages and the federal MCL framework for context.

Metric Assurance Technology Corp. Massachusetts avg Federal benchmark
Total violations 104 46.2 SDWA compliance, any non-zero count is a recorded breach
Health-based violations 15 4.6 Indicates a contaminant exceeded a federal MCL
PFAS detection None 54.4% EPA final rule (2024): PFOA/PFOS MCL = 4.0 ppt
Population served 75 6,462 Sizing context for compliance burden

Sources: EPA SDWIS and EPA National Primary Drinking Water Regulations (40 CFR Part 141). State averages computed across 1,599 regulated public water systems in Massachusetts.

Federal MCL reference, Safe Drinking Water Act thresholds ▼
Contaminant Federal MCL / Action Level Note
Lead 0 mg/L (Action Level: 0.015 mg/L) Lead and Copper Rule treatment technique
Arsenic 0.010 mg/L (10 ppb) Health-based MCL since 2006
Total Coliform Treatment technique (RTCR) Indicator organism, monitoring trigger
PFOA / PFOS (PFAS) 4.0 ppt each (final 2024 rule) Compliance deadline 2029 (EPA proposed extending to 2031, not yet final as of May 2026)
Nitrate (as N) 10 mg/L Acute health risk for infants

Frequently Asked Questions

Is Assurance Technology Corp. water safe to drink? ▼
Assurance Technology Corp. (PWS ID: MA3051011) has 104 recorded violations in the EPA SDWIS database. No PFAS contamination was detected in UCMR5 testing. This system serves 75 people using Groundwater sources.
How many people does Assurance Technology Corp. serve? ▼
Assurance Technology Corp. serves 75 people in Carlisle, Massachusetts. It is a Private-owned system using Groundwater water sources with 1 service connections.
What type of violations does Assurance Technology Corp. have? ▼
Assurance Technology Corp. has 104 total violations: 15 health-based violations (MCL exceedances or treatment failures), 85 monitoring/reporting violations, and 13 treatment technique violations. Health-based violations indicate contaminant levels exceeded EPA safe limits.
Has PFAS been detected in Assurance Technology Corp. water? ▼
No PFAS testing data is available for Assurance Technology Corp. under the EPA's UCMR5 monitoring program.
What water source does Assurance Technology Corp. use? ▼
Assurance Technology Corp. uses Groundwater as its primary water source. It is classified as a Non-Transient Non-Community Water System, serving the same people for at least 6 months per year.
Where does this data come from? ▼
All data comes from the EPA Safe Drinking Water Information System (SDWIS) and the UCMR5 PFAS monitoring program. SDWIS tracks compliance for all public water systems regulated under the Safe Drinking Water Act.
Data Sources: EPA Safe Drinking Water Information System (SDWIS), Q4 2025. This data is provided for informational purposes only.

Read our methodology - how this data is sourced, computed, and verified.

Data sourced from EPA SDWIS and UCMR5 PFAS monitoring data. See our methodology for details. Retrieved and formatted by PlainWater Editorial

Every figure on PlainWater is rendered directly from EPA SDWIS drinking-water data, no number is typed in by an editor. This system's figures are rendered directly from EPA SDWIS data, no figure is typed in by an editor. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error.