Is Rocky Hill, NJ tap water safe?
The short answer
Neither of the 2 utilities serving Rocky Hill has a result above a legal limit or action level, or a health-based violation since 2016, in EPA’s and CDC’s records.
Rocky Hill W Dept, which serves the most people here, has 2 results above the health goal. The worst: Arsenic at 3.1 ppb, above the health goal. Health goals are stricter than legal limits and are not enforced.
A town can be served by more than one utility, and some homes are on private wells. The name on your water bill tells you which is yours, and your ZIP code narrows it down. They are listed by how many people each serves in Rocky Hill’s ZIP codes, from EPA’s estimates.
- Open report
Rocky Hill W Dept
New Jersey · serves 687 people · about 490 in Rocky Hill
2 results above the health goal. The worst: Arsenic at 3.1 ppb, above the health goal.
No health-based violations since 2016
- Open report
NJ American Water - Raritan
New Jersey · serves 615,430 people · about 260 in Rocky Hill
2 results above EPA’s new limit, which takes effect in 2029, 3 results above the health goal and 1 result above EPA’s health benchmark. The worst: PFOA at 7.5 ppt, above EPA’s new limit, which takes effect in 2029.
No health-based violations since 2016
What handles it
Each of these is certified, on a certifier’s listing, for a result above a line in Rocky Hill W Dept’s water, which serves the most people here. Another utility’s report names what handles its own results.
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Countertop reverse osmosis
- IAPMO listing:NSF/ANSI 42NSF/ANSI 53NSF/ANSI 58NSF/ANSI 401checked Oct. 4, 2026
Certified for: Arsenic, Lead
Aquasana SmartFlow Reverse Osmosis (AQ-SFRO2)
Under-sink reverse osmosis
- WQA listing:NSF/ANSI 42NSF/ANSI 53NSF/ANSI 58NSF/ANSI 401checked Oct. 9, 2026
Certified for: Arsenic, Lead
Brondell Capella RC250 Reverse Osmosis System
Under-sink reverse osmosis
- WQA listing:NSF/ANSI 42NSF/ANSI 53NSF/ANSI 58NSF/ANSI 401checked Oct. 9, 2026
Certified for: Arsenic, Lead
Water testing near Rocky Hill
The 3 labs New Jersey certifies closest to Rocky Hill, in a straight line. Call first: certification is test by test, and not every lab takes samples from homeowners.
Environmental Compliance Monitoring Inc.
Hillsborough, NJ · about 7 miles
SGS North America Inc. - Dayton
Dayton, NJ · about 8 miles
Sadat Associates Inc.
Ewing, NJ · about 12 miles
ZIP codes in Rocky Hill
Which ZIP codes are in Rocky Hill: Census 2020 relationship files. Which utilities serve them, and how many people: EPA SDWIS and EPA’s service area map. Each utility’s results: EPA UCMR 5, EPA SDWIS, and EPA’s and the state’s compliance monitoring, as its report lists them. How they are measured: methodology. Certified labs: NJDEP Office of Quality Assurance, certified drinking water labs; distances from the Census 2020 ZIP code tabulation area gazetteer.
Near Rocky Hill
Other towns in Somerset County with a page of their own.
What to do next
- Read Rocky Hill W Dept’s full reportEvery result with its dates, the violations, and the certification claim that handles each finding.Open the report
- Filters for ArsenicRanked by certification and what they cost over five years.The best reverse osmosis systems, ranked
- On a private well?No utility tests a well. A certified lab test is the first step.How to test well water