The Whitman Water System — EPA/MassDEP Public Water System ID MA4338000 — is operated by the Town of Whitman's Department of Public Works, Water and Sewer Division, out of 100 Essex Street. Whitman does not own a reservoir, well field, or treatment plant of its own for its main supply. Instead, it purchases essentially all of its drinking water wholesale from the City of Brockton's water system (PWS ID MA4044000).
Brockton treats surface water from Silver Lake, located in the Town of Pembroke, at the 24-million-gallon-per-day Silver Lake Water Treatment Plant, using activated carbon filtration with coagulation, flocculation, sedimentation, and chlorine disinfection. The Silver Lake reservoir is supplemented seasonally (October–May, by gravity diversion) with water from Furnace Pond in Pembroke and Monponsett Pond in Halifax; Pine Brook is an emergency-only source that has been used once since 1986. Treated water reaches Whitman through two connection points: a 12-inch main on Temple Street at the Brockton line, and a 16-inch main on Bedford Street at Peaceful Meadows. In 2024, Whitman purchased 286.69 million gallons from Brockton, down from 308.31 million gallons in 2023.
Population served: approximately 15,216 per aggregator estimates, consistent with the town's 2020 Census population of 15,121 and 2024 Census estimate of 15,295. Whitman's Water and Sewer Division has been in operation since the town's 1875 incorporation.
Early planning research for this site flagged a spreadsheet entry describing Whitman's primary water source as the "Abington/Rockland Joint System" — raising the possibility that Whitman shares the Abington-Rockland Joint Water Works (ARJWW), the same utility that serves Abington and Rockland and has its own well-documented PFAS treatment history. We checked this directly against primary sources before writing anything else on this site, and the honest answer is: mostly no, but there's a real, narrow exception worth knowing about.
Whitman's own 2023 and 2024 Annual Water Quality Reports describe the Brockton/Silver Lake supply chain in full detail and do not mention ARJWW, Abington, or Rockland anywhere. That's strong evidence the Brockton purchase is genuinely the town's entire primary supply, not a partial arrangement. However, Rockland's own public ARJWW page lists Whitman as one of several "Joint" customer communities (alongside Hingham, Hanson, and Pembroke) that receive water via interconnection, distinct from Abington and Rockland's full joint ownership. That interconnection became visible in practice during a May 2025 boil-water order, when ARJWW issued a Tier 1 total coliform/E. coli notice covering Abington, Rockland, Pembroke, Hanson, and specific customers in Whitman and Hingham — not those towns' entire populations. Reporting on the order identified the specific affected location in Whitman as Danecca Drive, comparable to how Hingham's affected area was limited to a stretch of Abington Street near the Rockland town line.
Put plainly: the overwhelming majority of Whitman households are on the Brockton-supplied system described above, which has its own separate, and currently clean, testing record. A small number of properties on or near Danecca Drive appear to be tied to the ARJWW system instead, and would be subject to that system's own PFAS and violation history — which is materially different from Whitman's main supply and is documented on Abington Water Watch's water data page. We were not able to independently confirm the exact number of Whitman properties on this interconnection, or whether it is a permanent daily-service connection versus an emergency-only backup link; if you live on or near Danecca Drive and know which system actually serves your address day-to-day, let us know.
Whitman's 2023 and 2024 Annual Water Quality Reports each report zero MCL (Maximum Contaminant Level) violations across every regulated category tested, including PFAS6, disinfection byproducts, lead and copper, and microbial indicators. The City of Brockton's 2024 Consumer Confidence Report, covering the Silver Lake source that actually supplies Whitman, likewise reports no violations for 2024. EPA's ECHO database shows the Whitman Water System as being in compliance with federal health-based standards for its most recently assessed quarter.
| Category | What the record shows | Violation? |
|---|---|---|
| PFAS6 (combined) | 2.83 ppt (2021 sampling, reported in 2023 CCR); 2.20 ppt (2024 CCR) | No |
| Total trihalomethanes (TTHM) | Running annual average 49 ppb in 2024 (MCL 80 ppb); one individual quarterly sample came in at 93 ppb, above the 80 ppb MCL threshold, though compliance is judged on the running annual average, which stayed under the limit | No (RAA-based) |
| Haloacetic acids (HAA5) | Running annual average 21 ppb (MCL 60 ppb) | No |
| Lead (tap sampling) | 90th percentile effectively non-detect (Action Level 15 ppb) | No |
| Total coliform / E. coli | Zero positive samples reported in Whitman's own 2023/2024 CCRs for the Brockton-supplied system | No |
We flag one honest limitation: we reviewed Whitman's and Brockton's two most recent published CCRs plus EPA ECHO's current compliance summary, rather than pulling a full multi-year violation history directly from SDWIS/ECHO's raw data export. If you're aware of an older violation not reflected in recent CCRs, we'd like to hear about it — contact us. Separately, and unrelated to the Silver Lake source that supplies Whitman: Brockton's own 2024 CCR discloses that its Woodland Avenue Water Treatment Plant, fed by the Brockton Reservoir in Avon, has been inactive since spring 2021 due to elevated PFAS6 levels found in that reservoir. Because Whitman's connections draw from the Silver Lake side of Brockton's system rather than the Brockton Reservoir side, this doesn't directly affect Whitman's own water quality — but it's a notable fact about the regional supply chain Whitman depends on.
Unlike the Abington-Rockland Joint Water Works, which has recorded genuine, repeated PFAS6 exceedances at its Hannigan plant since March 2021, the Brockton/Silver Lake system that supplies nearly all of Whitman has consistently tested well under both the Massachusetts and federal PFAS standards. We're reporting this as the clean result it is, rather than manufacturing concern the data doesn't support:
| Compound(s) | Result | Applicable limit |
|---|---|---|
| PFAS6 (combined), Silver Lake WTP | 2.20 ppt (2024); 2.83 ppt (2021 sampling) | 20 ppt (MA PFAS6 MCL) |
| PFOA / PFOS individually | Not broken out separately in Whitman's or Brockton's published CCRs — only the combined PFAS6 figure is reported | 4 ppt each (federal individual limit) |
| PFBA (UCMR5, 2024) | 0.0059 μg/L | 6 μg/L (EPA health-based reference) |
| PFBS (UCMR5, 2024) | 0.0032 μg/L | Not established |
| PFHxA (UCMR5, 2024) | 0.0038 μg/L | 3 μg/L (EPA health-based reference) |
| PFPeA (UCMR5, 2024) | 0.0038 μg/L | Not established |
A genuine limitation worth naming: Whitman's and Brockton's CCRs report a combined PFAS6 figure rather than individually broken-out PFOA and PFOS results, so we can't state Whitman's specific PFOA/PFOS numbers against the federal 4 ppt individual limits the way Abington's site can for the ARJWW system. Given that the combined PFAS6 figure (2.2–2.83 ppt) is already well under the 20 ppt combined state standard, it's arithmetically very unlikely any individual compound is anywhere near 4 ppt, but that's an inference, not a directly reported number. The four UCMR5 compounds Whitman does report individually are all near or below detection and far under their reference concentrations.
How the rules around PFAS in drinking water have actually changed over the past several years — and where they stand right now.
MassDEP finalized an enforceable Maximum Contaminant Level (MCL) of 20 parts per trillion (ppt) for the sum of six PFAS compounds ("PFAS6") — PFOS, PFOA, PFHxS, PFNA, PFHpA, and PFDA. This is the standard the Brockton/Silver Lake system that supplies Whitman has stayed comfortably under, most recently testing at 2.2 ppt in 2024.
The EPA's National Primary Drinking Water Regulation (NPDWR) set the first-ever enforceable federal limits for PFAS: 4 ppt each for PFOA and PFOS individually, 10 ppt each for PFHxS, PFNA, and HFPO-DA (GenX), plus a combined Hazard Index limit for mixtures of those and PFBS. Water systems were given until 2027 to complete initial monitoring and until 2029 to come into full compliance. Whitman's system doesn't publish individually broken-out PFOA/PFOS figures, but its combined PFAS6 result is low enough that compliance with the new individual limits looks very likely, not marginal.
On May 18, 2026, EPA proposed two changes. The first (Docket EPA-HQ-OW-2025-1742) would keep the PFOA/PFOS limits at 4 ppt each but let water systems request a two-year compliance extension — to 2031 instead of 2029 — while requiring systems measuring 12 ppt or higher to take short-term mitigation action in the meantime. The second (Docket EPA-HQ-OW-2025-0654) would rescind the individual limits for PFHxS, PFNA, and HFPO-DA and the Hazard Index for PFAS mixtures, leaving the PFOA/PFOS limits untouched. EPA held a virtual public hearing on July 7, 2026, and as of this writing the combined comment dockets remain open through July 20, 2026. EPA has said it intends to take final action sometime in 2026 — check EPA's site directly for the current status before assuming either proposal is final. For a system like Whitman's, whose combined PFAS6 readings sit well under even the strictest individual limits at stake, this proposal is worth tracking as a matter of regional policy rather than an urgent local compliance question.
Sources: Mass.gov — Massachusetts PFAS Drinking Water Standard (MCL); Federal Register — PFAS National Primary Drinking Water Regulation (April 2024); EPA — Proposed PFOA and PFOS Compliance Extension Rule; EPA — Proposed PFAS Rescission Rule.
Whitman's own tap sampling shows lead at effectively non-detect levels (90th percentile at or near zero against a 15 ppb Action Level) in its most recent testing rounds, with zero of 30 sampled sites above the action level. Under the federal Lead and Copper Rule Improvements, public water systems nationwide were required to submit an initial service-line material inventory to their state regulator by October 16, 2024. We were not able to independently confirm a published, system-wide statement from Whitman's DPW about the specific results of that inventory (the kind of clean "no lead lines found" statement some neighboring systems have published) — we'd recommend contacting the Whitman DPW directly at 781-447-7630 for the inventory's current status rather than assuming either a clean or a concerning result.
We don't ask you to take our word for any of this. The underlying reports are public:
System-wide data only tells part of the story — your home's plumbing, fixtures, and which specific interconnection serves your street can all change what actually comes out of your tap.
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