Corrections
When we find an error, or someone tells us about one, we fix the page and list the change here, newest first.
To report an error, see contact and corrections or email hello@sourceandtap.com. How each value is checked is described in how we check the data.
From October 30 to November 7, 2026, the pages for Trenton Water Works and the towns it serves (Trenton and Ewing) said the system's 2025 report gave no value for PFOA or PFNA, and showed PFOS only. The report does list them: PFOA at 1.33 ppt and PFNA at 0.32 ppt in its Amount Detected column. The pages now show all three. All three values are below New Jersey's and EPA's limits, so the PFAS result for these towns hasn't changed. See the water system page, Trenton page, Ewing page and /nj/pfas/.
Filter listings on water system pages: we had said each filter's certification was checked on the certifier's own listing, but the documents we link to are the manufacturers' performance data sheets, and the pages now say so. Four Aquasana listings pointed to a summary page; they now link to each model's data sheet. The product listed as Aquasana's OptimH2O reverse osmosis system is the OptimH2O whole house system, and is now listed as one. PUR's data sheets certify total PFAS rather than PFOA and PFOS on their own; the pitcher filter is listed with its total PFAS claim, and the faucet filter, whose sheet doesn't say which PFAS were in the test, is no longer listed for PFOA and PFOS.
From October 22 to October 24, 2026, the pages for New Jersey American Water's Penns Grove system and the towns it serves (Penns Grove and Carneys Point) showed PFOA at 1.25 ppt and PFOS at 1.05 ppt. Those values are printed in the Penns Grove system's 2025 report, but in the section for the Logan system, which supplies water to it through an interconnection. We removed them. The report gives no PFAS compliance result for the Penns Grove system itself. See the water system page, Penns Grove page and Carneys Point page.
An earlier version of the Waterford Township page showed water quality results from New Jersey American Water's Western system as Waterford Township's tap water. That was wrong. New Jersey DEP's map of public water service areas shows no part of Waterford Township inside the Western system's service area. About 37% of residents live inside the Waterford Township water department's service area; about 62% live outside any mapped public water service area.
An earlier version of the Alexandria Township page showed water quality results from Aqua New Jersey's Phillipsburg system as Alexandria Township's tap water. That was wrong. Aqua's 2025 water quality report lists the Phillipsburg system's service area as Phillipsburg, Greenwich Township, Lopatcong Township and Pohatcong Township. Alexandria Township is not on that list.
An earlier version of the Holland Township page showed water quality results from Aqua New Jersey's Phillipsburg system as Holland Township's tap water. That was wrong. Aqua's 2025 water quality report lists the Phillipsburg system's service area as Phillipsburg, Greenwich Township, Lopatcong Township and Pohatcong Township. Holland Township is not on that list.
An earlier version of the Oldmans Township page showed water quality results from New Jersey American Water's Penns Grove system as Oldmans Township's tap water. New Jersey DEP's map of public water service areas shows about 24% of residents inside the Penns Grove system's service area, about 41% inside New Jersey American Water's Logan system's service area, and about 31% outside any mapped public water service area.
Hardness for the Short Hills system: its pages showed 342 mg/L without saying that this is the report's highest result. The report gives a range of 52 to 342 mg/L (2024), and the pages now show "up to 342 mg/L" with that range. On October 4 we did the same for the hardness values of 10 other systems, saying which kind of value each report gives (its highest result, an average or a single value); those values didn't change.
PFAS values: the charts on the water system pages said each value was the highest running annual average. That was true for three of the nine systems with charted results; the others report a highest single result or a "highest compliance result" without saying what it is. Each page now names the kind of value its report gives. On the same day we added a note to the Mount Holly and Harrison systems: their reports print the PFOA and PFOS values in the Delaware River Regional Water Treatment Plant section, so the values describe the surface water part of the supply, not the systems' wells.