Rockland does not operate its own water utility. Water is supplied by the Abington-Rockland Joint Water Works (ARJWW), a single combined public water system — one EPA/MassDEP Public Water System ID, MA4001000 — jointly owned and governed by the towns of Rockland and Abington through a Joint Board of Water Commissioners. This is genuine joint ownership, not a wholesale arrangement where one town simply buys finished water from another: both towns' names are on the utility, both appoint commissioners, and the system's violation history, PFAS levels, and treatment investments are identical for Rockland and Abington residents because it is, functionally, the same water.
The utility traces back to 1885–1886, when construction committees for both towns (chaired by Zenas M. Lane for Rockland and Augustus H. Wright for Abington) took possession of Great Sandy Bottom Pond in neighboring Pembroke and built roughly 33,000 feet of water main to the Abington/Rockland town line, at a cost of about $140,000.
Today the system draws from four gravel-packed wells in the aquifer beneath Abington plus two surface reservoirs — the John F. Hannigan Memorial Reservoir, right here in Rockland, and Great Sandy Bottom Pond in Pembroke — treated at three plants: the Hannigan Water Treatment Plant off Hingham Street in Rockland, the Myers Avenue Water Treatment Plant in Abington, and the Great Sandy Bottom Pond WTP in Pembroke. Water from all three blends into one shared distribution network. Beyond Rockland and Abington themselves, interconnections extend service (largely as backup or in specific areas) to parts of Whitman, Hanson, Pembroke, and a section of Hingham near the Abington/Rockland line — which is why a 2025 boil-water order affecting the core system also reached households in those towns.
Population served: public trackers disagree on the exact figure, reporting anywhere from about 33,600 to just under 34,000 people system-wide. We report the range rather than picking whichever number sounds more precise. Administratively, each town runs its own billing portal, but production, treatment, and distribution are unified under the single PWS ID above.
Because Rockland and Abington share one PWS ID, every violation below applies to both towns identically — there is no separate "Rockland" or "Abington" violation record, just one system's. That said, one entry on this list traces to a specific spot in Rockland itself.
| Period | Rule | What was found |
|---|---|---|
| Q1–Q2 2014, Q1–Q2 2015 | Stage 2 Disinfectants and Disinfection Byproducts Rule | MCL violations for Total Trihalomethanes (TTHM) and Haloacetic Acids (HAA5), tied to a specific low-flow sampling location on Longwater Drive in Rockland, near the Norwell town line |
| Starting March 2021; recurring Q2–Q3 2024 | Massachusetts PFAS6 MCL (20 ppt) | Quarterly average of 22.88 ppt for combined PFAS6 at the Hannigan plant's source water (Rockland); a July 2024 combined raw-water sample at Myers Avenue (Abington) measured PFOS at 18.8 ppt, above the federal 4 ppt individual limit |
| May 2025 | Total Coliform Rule (acute, Tier 1) | Total coliform in routine samples (May 12) followed by an E. coli-positive repeat sample (May 14); boil-water order issued for Rockland, Abington, Pembroke, Hanson, Whitman, and part of Hingham, lifted within roughly 72 hours once follow-up samples came back clear |
Sources: EPA SDWIS/ECHO violation records (aggregated by multiple independent public trackers, which vary slightly on total violation counts); Rockland-MA.gov and Town of Abington public notices; CBS News Boston and WATD 95.9 FM reporting on the May 2025 boil-water order.
Most of what's on this page describes a shared system's shared record. The 2014–2015 Stage 2 Disinfectants and Disinfection Byproducts Rule violations are different: MassDEP's monitoring data ties them to a specific low-flow sampling point on Longwater Drive in Rockland, near the Norwell town line — a location where water sits longer in the distribution system before reaching a tap, which is exactly the kind of spot where TTHM and HAA5 (byproducts formed when chlorine disinfectant reacts with organic matter in the water) tend to concentrate. Two consecutive years of quarterly monitoring at that location came back above the federal Maximum Contaminant Level. There's no public record of the violation recurring at that site since 2015, and it predates the PFAS story by several years — but it's a genuine, dated, Rockland-specific entry in this system's history, not just a shared statistic.
Unlike some neighboring systems where PFAS testing has come back clean, the Abington-Rockland Joint Water Works has had genuine, repeated MassDEP PFAS6 exceedances at its Hannigan plant source since March 2021 — a plant that sits in Rockland, drawing from the Rockland reservoir that shares its name — plus at least one raw-water PFOS reading at Myers Avenue in Abington above the federal individual limit. This is the system's most consequential water story of the past several years, and it's still actively being resolved:
| Plant / source | Recent status | Applicable limit |
|---|---|---|
| Hannigan WTP (Rockland) | 22.88 ppt PFAS6 quarterly average, Mar 2021; exceedances recurred Q2–Q3 2024 | 20 ppt (MA PFAS6 MCL) |
| Hannigan WTP (Rockland) | Permanent GAC/resin treatment online since March 4, 2026 — reducing PFAS6 to non-detect | 20 ppt (MA PFAS6 MCL) |
| Myers Avenue WTP (Abington) | Combined raw water: PFOS at 18.8 ppt, July 30, 2024 | 4 ppt (federal PFOS individual limit) |
| Myers Avenue WTP (Abington) | Interim pilot GAC system active; finished water currently testing below the 20 ppt PFAS6 limit; permanent treatment construction underway | 20 ppt (MA PFAS6 MCL) |
| Great Sandy Bottom Pond WTP (Pembroke) | Consistently well below the PFAS6 limit; no treatment required | 20 ppt (MA PFAS6 MCL) |
Rockland and Abington jointly borrowed roughly $26 million ($13 million each) to install granular activated carbon (GAC) and resin filtration, plus related plant upgrades, at the Hannigan and Myers Avenue plants. In the interim, ARJWW has operated a free self-serve water filling station at its main office (366 Centre Avenue, Rockland) for residents, particularly those in sensitive groups. Flag for verification before publishing further updates: sources differ slightly on whether Myers Avenue's permanent system has fully completed as of this writing or remains under construction with only the interim pilot system active — reconfirm current status directly with ARJWW or its public notices before treating this as fully resolved.
On October 16, 2024, MassDEP approved a statement from the Abington-Rockland Joint Water Works that its system has no lead, "Galvanized Requiring Replacement" (GRR), or unknown-material service lines, based on a system-wide inventory combining field inspection and records review. That statement doesn't independently verify individual lead connectors or gooseneck fittings at each service line, but it's a genuinely clean result on the material category regulators care about most — and it isn't a data point we'd expect to see on a system that wasn't actively working through its Lead and Copper Rule Revisions obligations.
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 Abington-Rockland Joint Water Works has been working to meet at its Hannigan and Myers Avenue plants ever since exceedances first appeared in March 2021.
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. This rule matters directly for Rockland: a July 2024 raw-water sample at the Myers Avenue plant measured PFOS at 18.8 ppt, well above the new 4 ppt individual limit, underscoring why the treatment project underway at both plants — including Rockland's own Hannigan plant — isn't optional.
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 the combined comment dockets remain open through July 20, 2026, with more than 15,000 comments submitted as of mid-July. EPA has said it intends to take final action on the rescission sometime in 2026 — check EPA's site directly for the current status before assuming either proposal is final. For a system like Rockland-Abington that has actually recorded PFOS readings above the 4 ppt limit at its own Hannigan plant, the extension proposal is not a hypothetical — it's directly relevant to how quickly the Myers Avenue treatment project needs to finish.
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.
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 how long water sits in your pipes can all change what actually comes out of your tap.
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