Photo: Bryan Housel · CC BY-SA 3.0Living in Mountainside, NJ: what to set up and who to call
The closest public drop-off to Mountainside is Fanwood Recycling Centre, 2 miles out; the town decides whether residents may use it. Children in Mountainside attend Mountainside Borough School District.
I’m new in town
What to set up in Mountainside, and who provides it. Tap an answer for the details and where they come from.
Power, water and internet
Who to call to start service at a new address in Mountainside.
Power comes from PSE&G
PSE&G (Public Service Electric & Gas Co.), an investor-owned utility, serves 86.5% of Mountainside residents. Its homes paid an average of 25.0¢ per kWh in 2025, about $140 a month (its average across New Jersey, for customers on its standard service). New Jersey lets you buy power from another supplier; 4% of PSE&G’s home customers do, and PSE&G still delivers it.
Start or move service: pseg.com · (800) 436-7734
Service territory: HIFLD Electric Retail Service Territories (map dated Aug 2023). Prices and customers: EIA-861, 2025.
Water comes from New Jersey American Water
New Jersey American Water supplies almost all of Mountainside. It draws surface water (EPA lists Nj American Water - Short Hills and Newark Water Department and Middlesex Water Company and Nj American Water - Liberty as sellers) and serves 615,430 people in all.
No health-based violations reported to EPA in the five years to October 2026, like 93% of the 42 systems serving 500,001–1,000,000 people.
The latest lead result on file, the 90th percentile of homes sampled in Jan–Dec 2026, was 1.0 ppb, below the 15 ppb action level that applied. The highest in five years was 3.0 ppb. That’s lower than 67% of similar systems’ latest results.
The system’s full record: EPA ECHO report
EPA SDWIS via Envirofacts (violations pulled Oct 9, 2026) and ECHO (lead samples, 2026Q3); service area: EPA Community Water System Service Area Boundaries v3.0. Violations are counted by the start of their compliance period. NJ2004002.
4 home internet providers serve Mountainside
100% of 2,585 addresses can get 100/20 Mbps; 92% can get fiber.
| Provider | Technology | Addresses | Fastest (Mbps) |
|---|---|---|---|
| Xfinity | Cable | 100% | 2,000/250 |
| Verizon | Fiber, Fixed wireless | 96% | 2,300/2,300 |
| T-Mobile | Fixed wireless | 85% | 100/20 |
| AT&T | Fixed wireless | 52% | 100/20 |
FCC National Broadband Map, as of December 2025. Availability as providers report it, not speeds people get.
The nearest public drop-off is 2 miles away
Pickup rules, the dump and recycling in Mountainside.
Fanwood Recycling Centre
· run by Township of Fanwood
This isn’t Mountainside’s own facility. Whether Mountainside residents may use it is the town’s rule: check mountainside-nj.com.
OpenStreetMap, as of Oct 9, 2026. © OpenStreetMap contributors.
Where your child goes to school
Public school districts and the school path by grade.
Mountainside is in Mountainside Borough School District.
A+School gradeSee Schools →U.S. Department of Education, NCES Common Core of Data, 2024–25. Enrollment rules and registration are the district’s.
Town hall and registering to vote
Who to call, and how to register.
Election office: FVAP local election office directory, updated Sep 2017; jurisdictions: EAC EAVS 2024. Registration rules and links: vote.gov, updated Nov 18, 2024.
Mountainside is in ZIP code 07092
ZIP codes where Mountainside residents live, with the share of the town in each.
| ZIP | Post office name | Share of Mountainside | ZIP’s residents in Mountainside |
|---|---|---|---|
| 07092 | Mountainside, NJ | 100% | 99% |
Census 2020 ZIP Code Tabulation Areas, by census block; post office names: GeoNames (CC BY 4.0). ZIPs created since 2020 are missing.
Getting around, the ER and the library
One line each; the subject pages have the rest.
ER: CMS hospital data. Library: IMLS Public Libraries Survey, FY2024.
Questions about living in Mountainside
Who supplies Mountainside’s drinking water, and has it had violations?
New Jersey American Water (EPA ID NJ2004002). It reported no health-based violations to EPA in the five years to October 2026; 93% of systems its size had none. Its latest lead 90th percentile was 1.0 ppb (Jan–Dec 2026), against a 15 ppb action level.
Who provides electricity in Mountainside?
PSE&G (Public Service Electric & Gas Co.), an investor-owned utility. Its homes paid about 25.0¢ per kWh in 2025 (EIA).
What internet providers serve Mountainside?
Xfinity, Verizon, T-Mobile, AT&T (FCC, as of December 2025).
What ZIP codes are in Mountainside?
07092. Census 2020 ZIP Code Tabulation Areas.
What school district is Mountainside in?
Mountainside Borough School District.
How do I register to vote in Mountainside?
In New Jersey you can register online until 21 days before Election Day, in person until 21 days before Election Day, or by mail (postmarked 21 days before). Elections here are run by the Union County Clerk. Check your registration at voter.svrs.nj.gov.
Sources & dates
Every answer above names its source. Here they are with their dates.
- Water: EPA SDWIS (Envirofacts, pulled Oct 9, 2026), ECHO SDWA 2026Q3, EPA CWS Service Area Boundaries v3.0.
- Power: HIFLD Electric Retail Service Territories (map Aug 2023); EIA-861 final 2025.
- Trash: OpenStreetMap, Geofabrik extract of Oct 9, 2026. © OpenStreetMap contributors (ODbL).
- ZIP codes: Census 2020 ZCTA relationship files; GeoNames postal codes (CC BY 4.0).
- Schools: NCES Common Core of Data, 2024–25.
- Registration: vote.gov, updated Nov 18, 2024 (read Oct 10, 2026). Official sites and area codes: Wikidata.
- Election office: FVAP local election office directory (fetched Oct 10, 2026; each record dated), EAC EAVS 2024 jurisdictions; registration and lookup links from vote.gov’s state data, checked Oct 10, 2026.
- Internet: FCC National Broadband Map, as of December 2025.