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Water quality report

NORWICH PUBLIC UTILITIES

NORWICH, CT · 36,163 people served · EPA PWSID CT1040011

The bottom line

NORWICH PUBLIC UTILITIES (NORWICH, CT), which serves about 36,163 people, has recorded 1 health-based drinking-water contaminant in EPA violation records since 2016, most notably Total Trihalomethanes (TTHM). Its most recent lead 90th-percentile sample was 0.0 ppb, within the 15 ppb federal action level. EPA's UCMR5 program detected PFAS 'forever chemicals' in this system: PFOS (0.0162 µg/L), PFHxS (0.0125 µg/L), PFOA (0.0067 µg/L). PFOA/PFOS levels exceed the 2024 federal limit of 4 ppt (0.004 µg/L). A certified water filter can reduce these at the tap — see the certified options for each below.

health contaminants on record

PFAS detected (UCMR5)

total violations on record since 2016 (incl. monitoring & reporting)

What the testing found

Measured levels from EPA violation records, compared to the federal limit (MCL). The black line marks the legal limit.

Total Trihalomethanes

1.1× the federal limit

Measured 0.089 mg/L · federal limit 0.08 mg/L · latest 01/01/2018 · 5 violations since 2016

Chlorination byproduct; MCL 80 ug/L. Long-term bladder cancer and reproductive risk. Higher in surface-water systems.

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Lead

Not detected

Measured 0 ppb · federal limit 15 ppb · latest 12/31/2025 · 0 violations since 2016

No safe level. Damages developing brain/nervous system in children; linked to lower IQ, kidney and cardiovascular harm in adults. Usually enters water from corroding pipes/solder, not the source.

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PFAS "forever chemicals"

Detected by EPA's UCMR5 monitoring. The 2024 federal limit for PFOA and PFOS is 4 ppt (0.004 µg/L).

PFOS

4.0× the 4 ppt limit

Measured 0.0162 µg/L · sampled 11/14/2023 · detection limit 0.004 µg/L

PFHxS

Detected

Measured 0.0125 µg/L · sampled 11/14/2023 · detection limit 0.003 µg/L

PFOA

1.7× the 4 ppt limit

Measured 0.0067 µg/L · sampled 11/14/2023 · detection limit 0.004 µg/L

PFBS

Detected

Measured 0.006 µg/L · sampled 11/14/2023 · detection limit 0.003 µg/L

PFPeA

Detected

Measured 0.0039 µg/L · sampled 11/14/2023 · detection limit 0.003 µg/L

See PFAS-certified filters → Best reverse osmosis

Your recommended fix

Filters certified to clean up your water

Your water shows Total Trihalomethanes, PFOA, PFOS, PFAS. A refrigerator filter handles the most of this in one unit — these three are independently certified for the most of your contaminants (not marketing claims):

Best match for your water

Whirlpool

EDR3RXD1B

Covers 4 of your 4 filterable contaminants

REFRIGERATOR NSF certified

$46.12

23.1¢/gal

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Whirlpool

EDR3RXD1R

Covers 4 of your 4 filterable contaminants

REFRIGERATOR NSF certified

$46.12

23.1¢/gal

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Whirlpool

P1WB2

Covers 4 of your 4 filterable contaminants

REFRIGERATOR NSF certified

$46.12

23.1¢/gal

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Compare all certified refrigerator filters →

Want certainty about your tap specifically (not just the system)? A certified mail-in lab test is the gold standard — system-wide records can differ from your home's plumbing. Some links above are affiliate links — see our disclosure.

Sources & method. Contaminant levels and violations come from EPA's Safe Drinking Water Information System (health-based violations, 2016–present); PFAS from EPA UCMR5 monitoring (2023–2025). Levels shown are the highest recorded value in the violation records; a violation means the contaminant exceeded its federal limit at the system level. Your home's water can differ from the system average. Public domain data; we are not affiliated with the EPA.