Water system

Westborough Water Department

C
Massachusetts EPA ID MA2328000 21,567 people Surface water

What this means for you

Is it safe to drink right now?
Based on the latest EPA data, Westborough Water Department has no unresolved health-based violations from the past year. Water that meets federal standards is generally considered safe to drink for most healthy people.
Should I use a filter?
Optional. Nothing in this data strongly calls for one. Many people still filter for chlorine taste and odor.
What kind of filter?
For taste and odor (chlorine/chloramine), an NSF/ANSI 42 pitcher or faucet filter is enough. See matched standards and product picks.

This is general information from public EPA data, not medical advice. Lead often comes from a home’s own pipes, so only a test of your tap can tell your exposure. If you are pregnant, caring for an infant, or have a weakened immune system, ask your doctor or health department.

Summary: 1 health-based violation in the last 5 years; 57 monitoring/reporting violations; PFAS tested (UCMR 5), none above federal limits; Lead 90th percentile below the action level (2025).
EPA data snapshot 2026Q3. Grade is TapWaterZip's own score — see methods.

PFAS (“forever chemicals”), EPA UCMR 5

ChemicalHighest location averageHighest single sampleFederal limitDetections/samples
PFOS3.8 ppt7.5 ppt4 ppt1/12
PFBS1.7 ppt3.4 pptnone1/12
PFOA2.9 ppt5.8 ppt4 ppt2/12
3 PFAS tested and not detected

HFPO-DA, PFHxS, PFNA (12 samples each, below EPA minimum reporting levels).

Hazard Index (PFHxS, PFNA, GenX, PFBS): 0 (limit 1.0, proposed for repeal).

Averages are per sampling location across UCMR 5 samples (non-detects counted as 0), approximating the rule’s running annual average. Not an official compliance determination; PFOA/PFOS MCL compliance begins April 26, 2029.

Lead and copper

Lead 90th percentile0 ppb2025-12-31
Current action level15 ppbLCRI lowers to 10 ppb on Nov 1, 2027

Violations (last 5 years)

BeganTypeContaminant / ruleStatus
2025-11-01Required treatment not doneSurface Water Treatment RuleResolved
2025-08-01Missed or late testing/reportingTTHMArchived
2025-08-01Missed or late testing/reportingTotal Haloacetic Acids (HAA5)Archived
2023-10-01Missed or late testing/reportingLead and Copper RuleResolved
2023-07-01Missed or late testing/reportingArsenicResolved
2023-04-01Missed or late testing/reportingStyreneArchived
2023-04-01Missed or late testing/reportingTetrachloroethyleneArchived
2023-04-01Missed or late testing/reportingtrans-1,2-DichloroethyleneArchived
2023-04-01Missed or late testing/reportingp-DichlorobenzeneArchived
2023-04-01Missed or late testing/reporting1,2-DichloroethaneArchived
2023-04-01Missed or late testing/reporting1,1-DichloroethyleneArchived
2023-04-01Missed or late testing/reportingTrichloroethyleneArchived
2023-04-01Missed or late testing/reportingCHLOROBENZENEArchived
2023-04-01Missed or late testing/reportingBenzeneArchived
2023-04-01Missed or late testing/reportingTolueneArchived
2023-04-01Missed or late testing/reportingXylenes, TotalArchived
2023-04-01Missed or late testing/reportingEthylbenzeneArchived
2023-04-01Missed or late testing/reporting1,1,1-TrichloroethaneArchived
2023-04-01Missed or late testing/reportingCarbon tetrachlorideArchived
2023-04-01Missed or late testing/reportingcis-1,2-DichloroethyleneArchived
2023-04-01Missed or late testing/reporting1,2-DichloropropaneArchived
2023-04-01Missed or late testing/reportingo-DichlorobenzeneArchived
2023-04-01Missed or late testing/reportingDICHLOROMETHANEArchived
2023-04-01Missed or late testing/reportingVinyl chlorideArchived
2023-04-01Missed or late testing/reporting1,1,2-TrichloroethaneArchived

Filters matched to this water

FILTER PICKS

Look for filters certified (NSF, IAPMO or WQA) to these standards for the specific contaminant. Buttons open the maker’s page or an Amazon search; use “Check NSF listing” to verify a model’s claims. No affiliate links yet — grades are never sold.

PFOS

NSF/ANSI 53 (PFOA/PFOS claim)NSF/ANSI 58 (RO)
Aquasana Claryum or OptimH2O (PFAS claim) ~$100–350
Aquasana under-sink lineup; must list PFOA/PFOS on the certificate — check before buying.
View on Aquasana →
Check NSF listing · Not an affiliate link · disclosure
Clearly Filtered Pitcher (PFAS claim) ~$110
Pitcher option with published PFAS reduction claims; verify NSF/IAPMO listing.
View on Clearly Filtered →
Check NSF listing · Not an affiliate link · disclosure
Waterdrop G3 / G3P600 RO ~$300–500
Tankless RO; RO broadly reduces nitrate, fluoride, arsenic and many PFAS — confirm the certificate lists yours.
Search on Amazon →
Check NSF listing · Not an affiliate link · disclosure

PFOA

NSF/ANSI 53 (PFOA/PFOS claim)NSF/ANSI 58 (RO)
Aquasana Claryum or OptimH2O (PFAS claim) ~$100–350
Aquasana under-sink lineup; must list PFOA/PFOS on the certificate — check before buying.
View on Aquasana →
Check NSF listing · Not an affiliate link · disclosure
Clearly Filtered Pitcher (PFAS claim) ~$110
Pitcher option with published PFAS reduction claims; verify NSF/IAPMO listing.
View on Clearly Filtered →
Check NSF listing · Not an affiliate link · disclosure
Waterdrop G3 / G3P600 RO ~$300–500
Tankless RO; RO broadly reduces nitrate, fluoride, arsenic and many PFAS — confirm the certificate lists yours.
Search on Amazon →
Check NSF listing · Not an affiliate link · disclosure

Chlorine/chloramine taste

NSF/ANSI 42
Aquasana Clean Water Pitcher ~$35
Pitcher for chlorine taste/odor; check the NSF/ANSI 42 listing for the exact model.
Search on Amazon →
Check NSF listing · Not an affiliate link · disclosure
Brita Elite Filter ~$20–40
Common faucet/pitcher option; confirm the 42 claim on the box.
View on Brita →
Check NSF listing · Not an affiliate link · disclosure

Annual water quality report

Utilities must publish a Consumer Confidence Report every year by July 1. Find it on the utility’s website or ask them directly; EPA explains how.

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