90 Main Street LLC
Published drinking-water records and contacts for 90 Main Street LLC. System MA4052045. Review sources and dates; not a real-time water assessment.
- System ID
- MA4052045
- State or territory
- MA
- Published population served
- 30
- System type (source code)
- TNCWS
Published records and dates
- Lead and copper monitoring summaries: 17 — 2004-01-01 – 2024-12-31
- Massachusetts EEA PFAS monitoring results: 144 — 2021-12-28 – 2024-05-21
Missing records here do not mean the provider did not test. Published records are not a real-time assessment of your tap water.
Published testing results
Selected recent records are shown below. Different sampling locations and dates are not interchangeable. These excerpts are not a complete testing history.
“<” means below the stated reporting limit, not zero. A reported measurement alone is not a safety verdict. Read an example
Lead and copper: 90th-percentile summaries
These describe a monitoring period across sampled locations, not the result at your home. How to read the 90th percentile
| Substance | Published 90th percentile | Monitoring period | Source quarter |
|---|---|---|---|
| Lead (PB90) | 0.0043 mg/L | 2024-07-01 – 2024-12-31 | 2026Q3 |
| Copper (CU90) | 6.215 mg/L | 2024-01-01 – 2024-06-30 | 2026Q3 |
| Lead (PB90) | 0.0225 mg/L | 2024-01-01 – 2024-06-30 | 2026Q3 |
| Copper (CU90) | 4.15 mg/L | 2021-01-01 – 2023-12-31 | 2026Q3 |
| Lead (PB90) | 0.0155 mg/L | 2021-01-01 – 2023-12-31 | 2026Q3 |
| Lead (PB90) | 0.002 mg/L | 2017-01-01 – 2019-12-31 | 2026Q3 |
| Lead (PB90) | 0.003 mg/L | 2013-01-01 – 2015-12-31 | 2026Q3 |
| Lead (PB90) | 0.001 mg/L | 2012-01-01 – 2012-06-30 | 2026Q3 |
| Substance | Published result | Sample date | Location / source |
|---|---|---|---|
| 4,8-DIOXA-3H-PERFLUORONONANOIC ACID - ADONA | Below a limit; numeric threshold unavailable ng/L | 2024-05-21 | WELL # 1 - END 4/30/2024 / Massachusetts EEA PFAS monitoring results |
| PERFLUOROHEXANESULFONIC ACID-PFHXS | 1.89 J ng/L | 2024-05-21 | WELL # 1 - END 4/30/2024 / Massachusetts EEA PFAS monitoring results |
| PERFLUOROTETRADECANOIC ACID - PFTA | Below a limit; numeric threshold unavailable ng/L | 2024-05-21 | WELL # 1 - END 4/30/2024 / Massachusetts EEA PFAS monitoring results |
| PERFLUOROUNDECANOIC ACID - PFUNA | Below a limit; numeric threshold unavailable ng/L | 2024-05-21 | WELL # 1 - END 4/30/2024 / Massachusetts EEA PFAS monitoring results |
| PERFLUOROOCTANOIC ACID-PFOA | 7.82 ng/L | 2024-05-21 | WELL # 1 - END 4/30/2024 / Massachusetts EEA PFAS monitoring results |
| HEXAFLUOROPROPYLENE OXIDE DIMER ACID - HFPO-DA | Below a limit; numeric threshold unavailable ng/L | 2024-05-21 | WELL # 1 - END 4/30/2024 / Massachusetts EEA PFAS monitoring results |
| PERFLUORODECANOIC ACID - PFDA | Below a limit; numeric threshold unavailable ng/L | 2024-05-21 | WELL # 1 - END 4/30/2024 / Massachusetts EEA PFAS monitoring results |
| PERFLUOROHEXANOIC ACID - PFHXA | 7.65 ng/L | 2024-05-21 | WELL # 1 - END 4/30/2024 / Massachusetts EEA PFAS monitoring results |
| PERFLUORODODECANOIC ACID - PFDOA | Below a limit; numeric threshold unavailable ng/L | 2024-05-21 | WELL # 1 - END 4/30/2024 / Massachusetts EEA PFAS monitoring results |
| N-METHYL PERFLUOROOCTANESULFONAMIDOACETIC ACID - NMEFOSAA | Below a limit; numeric threshold unavailable ng/L | 2024-05-21 | WELL # 1 - END 4/30/2024 / Massachusetts EEA PFAS monitoring results |
| 9-CHLOROHEXADECAFLUORO-3-OXANONE-1-SULFONIC ACID-9CL-PF3ONS | Below a limit; numeric threshold unavailable ng/L | 2024-05-21 | WELL # 1 - END 4/30/2024 / Massachusetts EEA PFAS monitoring results |
| PERFLUOROHEPTANOIC ACID-PFHPA | 3.47 ng/L | 2024-05-21 | WELL # 1 - END 4/30/2024 / Massachusetts EEA PFAS monitoring results |
State sampling points can include untreated water. Publisher qualifiers and units are retained; consult the full source notes before interpreting a record.
Download state records with source notes (CSV)
Published compliance history
7 imported records. Status is as recorded in the source; historical records are not current advisories. Missing records do not establish that no violations occurred.
| Rule / record | Period | Recorded status | Health-based (EPA classification) | Source quarter |
|---|---|---|---|---|
| Revised Total Coliform Rule / Report Sample Result/Fail Monitor (RTCR) | 2023-04-11 – — | Resolved | No | 2026Q3 |
| Revised Total Coliform Rule / Monitoring, Routine (RTCR) | 2023-03-01 – 2023-03-31 | Archived | No | 2026Q3 |
| Lead and Copper Rule / Follow-up Or Routine LCR Tap M/R | 2022-06-01 – — | Resolved | No | 2026Q3 |
| Nitrate Rule / Monitoring, Regular | 2022-02-01 – 2022-02-28 | Archived | No | 2026Q3 |
| Revised Total Coliform Rule / Report Sample Result/Fail Monitor (RTCR) | 2020-09-11 – — | Resolved | No | 2026Q3 |
| Revised Total Coliform Rule / Monitoring, Routine (RTCR) | 2020-08-01 – 2020-08-31 | Archived | No | 2026Q3 |
| Lead and Copper Rule / Follow-up Or Routine LCR Tap M/R | 2018-10-01 – — | Resolved | No | 2026Q3 |
Source dates and refresh checks
A refresh check is not a sample date. Publication periods, sample dates and checks are shown separately.
- EPA SDWIS lead/copper summaries and service areas — source period: — – —; last checked: 2026-10-17
- EPA SDWIS contacts and compliance records — source period: — – —; last checked: 2026-10-17
- EPA UCMR 5 sample results — source period: 2023-01-03 – 2026-06-17; last checked: 2026-10-17
- Massachusetts EEA PFAS monitoring results — last successful check: 2026-10-12
Administrative contact (EPA filing)
Mahalo Holdings, LLC: 9145741590
An administrative filing contact may not be a customer-service line. Confirm current contact details with the provider.