Public water system record

Rochester Water Dept

Serves Rochester, Strafford County, NH · 25,000 people served

Federal records show 2 health-based violations and 2 monitoring/reporting issues for Rochester Water Dept in the last ten years. The most serious issue in this window was a resolved Haloacetic Acids (HAA5) violation.

NH2001010
ROCHESTER
NH
25,000 served

System profile

Source water Surface water

ZIP 03867

EPA system ID NH2001010

Verify this system on EPA ECHO →

Health-based violations, last 10 years: 2
Resolved: 2
Unresolved: 0
Any acute record: No
Monitoring issues, last 10 years: 2

Key facts

Rochester Water Dept draws water from 1 well and 1 surface water intake.
Highest measured level in the last 10 years: Total Trihalomethanes (TTHMs), 0.082 mg/L, federal limit 0.08 mg/L (at or just above the limit), 2016.
Record on file since 1997, with 8 health-based violations before October 19, 2016.

Check whether Rochester Water Dept serves your address

Health-based violations

Since October 2016

Violation data reflects EPA records through March 2026. For the most current status, visit the EPA ECHO database.

Contaminant	Rule family	Start date	Status	Acute
Haloacetic Acids (HAA5) Contaminant limit exceeded Measured 0.061 mg/L, federal limit 0.06 mg/L (at or just above the limit)	220	Jan 1, 2022	Resolved	No
Total Trihalomethanes (TTHMs) Contaminant limit exceeded Measured 0.082 mg/L, federal limit 0.08 mg/L (at or just above the limit)	220	Oct 1, 2016	Resolved	No

Monitoring and reporting issues

Since October 2016

Missed tests or reports, not contaminants found above a limit.

Issue	Start date	Status
Public Notice OTHER	Mar 27, 2017	Active
Public Notice OTHER	Dec 8, 2016	Active

Full record since 1997

EPA's records for Rochester Water Dept go back to 1997. Before October 19, 2016 they list 8 health-based violations (8 resolved) and 1 monitoring or reporting violation.

Violations that began in	Health-based	Monitoring and reporting
1990s	1	0
2000s	4	0
2010 to October 18, 2016	3	1
October 19, 2016 to 2019	0	2
2020s	1	0

Most recent health-based violation before October 19, 2016: Total Trihalomethanes (TTHMs), began October 2016, Resolved.

Show all 8 health-based violations before October 19, 2016

Contaminant	Start date	Status
Total Trihalomethanes (TTHMs) Contaminant limit exceeded Measured 0.082 mg/L, federal limit 0.08 mg/L (at or just above the limit)	Oct 1, 2016	Resolved
Total Trihalomethanes (TTHMs) Contaminant limit exceeded Measured 0.09 mg/L, federal limit 0.08 mg/L (1.1 times the limit)	Jul 1, 2016	Resolved
Total Coliform Contaminant limit exceeded	Oct 1, 2012	Resolved
Total Trihalomethanes (TTHMs) Contaminant limit exceeded	Jan 1, 2005	Resolved
Total Trihalomethanes (TTHMs) Contaminant limit exceeded	Apr 1, 2003	Resolved
Total Trihalomethanes (TTHMs) Contaminant limit exceeded	Jan 1, 2003	Resolved
Total Coliform Contaminant limit exceeded	Feb 1, 2001	Resolved
Surface Water Treatment Rule Treatment technique failure	Sep 1, 1997	Resolved

What the violations mean

Haloacetic Acids (HAA5)

1 incident

Haloacetic acid byproducts exceeded the federal limit

Long-term exposure to HAAs may increase cancer risk

Total Trihalomethanes (TTHMs)

1 incident

Disinfection byproduct levels exceeded the federal limit

Long-term TTHM exposure may increase bladder cancer risk

Where the water comes from

Rochester Water Dept draws water from 1 well and 1 surface water intake.

Annual water quality report

Rochester Water Dept must give its customers an annual water quality report (Consumer Confidence Report) by July 1, with the levels its tests found in the previous year.

Systems serving 10,000 or more people must mail or deliver the report to every customer, and from 2027 they must send it twice a year.

Find a posted report with EPA's Consumer Confidence Report search

Testing your own water

To test the water at your tap, or a private well this record does not cover, use a laboratory certified for drinking water by New Hampshire.

Certified drinking water labs by state EPA guidance for private wells