N Swanzey Water and Fire Prct

What EPA’s and CDC’s records show in this utility’s water: nitrate, arsenic and other regulated chemicals, plus violations since 2016, with the certification that handles each result.

Serves: 1,700 people
Connections: 465
Water source: Surface water bought from another system
Based in: Swanzey, NH
County: Cheshire
Owner: Local government

The short answer

Nothing in EPA’s and CDC’s records for this utility is above a health goal. That covers nitrate, arsenic and other regulated chemicals, not everything. No health-based violations on file since 2016.

What was found

Total trihalomethanes (TTHM) and haloacetic acids (HAA5): New Hampshire’s yearly averages per water system, as CDC’s Environmental Public Health Tracking Network publishes them, 2020 to 2023, with EPA’s 2012 to 2019 file for earlier years.

Below EPA’s limits2

Total trihalomethanes (TTHM)

Forms or is added in treatment

Below EPA’s limits

53.7ppb

Highest yearly average, 2020 to 2023

2023 average: 51.3 ppb

Averaged by year, the highest was 53.7 ppb, in 2021, below EPA’s legal limit of 80 ppb. In 2023, the latest year on file, it averaged 51.3 ppb. Earlier, from 2012 to 2019, EPA’s file shows a highest yearly average of 67.3 ppb, in 2017.

What handles it

NSF/ANSI 53 look for “Trihalomethanes (TTHM) Reduction”
NSF/ANSI 58 look for “Trihalomethanes (TTHM) Reduction”

Haloacetic acids (HAA5)

Forms or is added in treatment

Below EPA’s limits

37.7ppb

Highest yearly average, 2020 to 2023

2023 average: 31.1 ppb

Averaged by year, the highest was 37.7 ppb, in 2021, below EPA’s legal limit of 60 ppb. In 2023, the latest year on file, it averaged 31.1 ppb. Earlier, from 2012 to 2019, EPA’s file shows a highest yearly average of 32 ppb, in 2014.

What handles it

No certification claim covers this compound yet.

Violations since 2016

No health-based violations on file with EPA since 2016.

What this report can’t tell you

Everything else. Total trihalomethanes (TTHM) and haloacetic acids (HAA5) results here are New Hampshire’s yearly averages as CDC publishes them, from 2020 on, with EPA’s national file for 2012 to 2019. N Swanzey Water and Fire Prct’s own annual report, which it must send you every year, has the contaminants this page does not show.
Your own plumbing. Lead results are the 90th percentile across homes the utility samples. Your home’s service line, solder and fixtures decide yours. A certified lab test is the only way to know.
What it means for your health. This page reports what the records show and EPA’s limits and goals; it is not medical advice. If you are worried about a health effect, talk to a doctor or your local health department.
Anything after the latest data. SDWIS data is from 2026 Q3; UCMR 5 didn’t sample this utility; CDC’s yearly averages for New Hampshire cover 2020 to 2023.

Testing your own tap

N Swanzey Water and Fire Prct’s results are for the water it sends out. What your own service line, solder and fixtures add shows up only in a test of your tap, by a lab New Hampshire certifies.

No lab New Hampshire certifies is within 75 miles of the area N Swanzey Water and Fire Prct serves on the state’s list. Some take samples by mail; the state’s page lists them all.

All 63 certified labs for New Hampshire

Sources

EPA UCMR 5 occurrence data, file of Oct. 15, 2026
EPA SDWA bulk download (SDWIS federal data), 2026 Q3
CDC Environmental Public Health Tracking Network, yearly averages New Hampshire supplied to CDC, 2020 to 2023, read Oct. 8, 2026. TapBuff’s comparisons with EPA’s limits are its own, not CDC’s or New Hampshire’s.
EPA Six-Year Review 4 compliance monitoring data, 2012 to 2019, file of Feb. 5, 2024
Limits and goals: each contaminant’s page, with its EPA source.
How this page is built: methodology.

PWSID NH2301010. Rebuilt from EPA data on Oct. 18, 2026.

Also in Cheshire County

All New Hampshire utilities