Is Hanover Water Dept water safe to drink?

Hanover Water Dept (PWS ID: MA4122000) has 51 recorded violations in the EPA SDWIS database. PFAS contamination has been detected in UCMR5 testing, with 7 PFAS compounds found. EPA SDWIS lists this system's service population as 14,984 people using Surface Water sources.

How many people does Hanover Water Dept serve?

EPA SDWIS reports that Hanover Water Dept serves 14,984 people (this public water system's service population, not the municipal population of Hanover or any other city). It is a Local-owned system using Surface Water water sources with 5,165 service connections. The operator address is listed in Hanover, Massachusetts.

What type of violations does Hanover Water Dept have?

Hanover Water Dept has 51 total violations: 15 health-based violations (MCL exceedances or treatment failures), 30 monitoring/reporting violations, and 0 treatment technique violations. Health-based violations indicate contaminant levels exceeded EPA safe limits.

Has PFAS been detected in Hanover Water Dept water?

Yes. UCMR5 testing detected 7 PFAS compounds in Hanover Water Dept's water supply: PFBS, PFHpA, PFOS, PFOA, PFHxA, and others. PFAS are persistent "forever chemicals" that do not break down in the environment.

What water source does Hanover Water Dept use?

Hanover Water Dept uses Surface Water as its primary water source. It is classified as a Community Water System (CWS), serving residential populations year-round.

Where does this data come from?

All data comes from the EPA Safe Drinking Water Information System (SDWIS) and the UCMR5 PFAS monitoring program. SDWIS tracks compliance for all public water systems regulated under the Safe Drinking Water Act.

Where does Hanover Water Dept sit among U.S. public water systems?

According to EPA SDWIS population_served among sitemap-advertised systems (serving 500+), Hanover Water Dept ranks #3,474 of 29,740 by people served, and #144 of 418 in Massachusetts. Ordinals use population_served DESC among systems serving 500+ (the sitemap cohort). See /methodology#corpus-placement.

How does Hanover Water Dept's violation count compare nationally?

Hanover Water Dept has 51 recorded EPA SDWIS violations, fewer than 43% of the 29,740 public water systems serving 500 or more people nationwide (the same sitemap cohort used for the corpus-placement ranking above). 57% of that cohort has fewer violations than Hanover Water Dept. A system can have zero recorded violations and still be actively monitored, and a high violation count often reflects a system that reports thoroughly, not necessarily one with worse water.

States → Massachusetts

Community Water System · PWS MA4122000

Hanover Water Dept

Operator location Hanover, Massachusetts - 29% of 51 violations are health-based (upper-third health share (> 23%)); surface water source; 14,984 served per SDWIS.

Compiled by PlainWater · May 15, 2026

14,984
People served (this PWS) Larger third of systems: 51
EPA violations (this PWS) Middle third of systems: 15
Health-based (this PWS) Upper third by health-based share: 7 PFAS
UCMR5 (this PWS) Upper third of PFAS-detected systems

Follow published updates (RSS)

Hanover Water Dept standing, mid SDWIS violation third

29% of 51 recorded violations are health-based - upper-third health share (> 23%). Corpus terciles use 29,740 systems serving 500+ (the sitemap cohort). Health-based share 29% is upper-third health share (> 23%). UCMR5: upper-third PFAS panel (> 4 compounds). Population rank #3,474 of 29,740 among systems serving 500+.

The verdict

Hanover Water Dept lands in the middle third by violation volume (51), large enough for peer comparisons without matching the fleet's heaviest ledgers. Population served is large (14,984; larger served population (> 3,309)), so household exposure scale sits behind the violation mix. Health-based share is 29% - most of this ledger is MCL or treatment-technique exceedance. UCMR5 detected 7 PFAS compounds (upper-third PFAS panel (> 4 compounds)).

#3,474 of 29,740
Population · /systems: #144 of 418
Population · MA: 51
Total EPA violations on record: 29%
Health-based (MCL / treatment failure)

Population ordinals match the sitemap cohort (systems serving 500+, population_served DESC). See methodology · corpus placement.

PFAS Detected

7 PFAS "forever chemicals" detected in testing under EPA's UCMR5 monitoring program.

Water Safety Score

28/100

Hanover Water Dept

Based on EPA SDWIS violation history and UCMR5 PFAS testing only, not water taste, odor, infrastructure age, or contaminants outside the federally tracked set.

Health-based violations F

EPA SDWIS health-based violations on record (MCL, MRDL, treatment technique)

Monitoring & reporting violations F

Non-health SDWIS violations (monitoring, reporting, and other compliance)

PFAS contamination F

0.0116 µg/L

Highest PFAS compound level detected in UCMR5 testing

System Details

System Type: Community
Owner Type: Local
Connections: 5,165
County: Plymouth
School/Daycare: No
MCL Violations: 15
Monitoring Violations: 30
Treatment Tech Violations: 0

Violation History

Contaminant violations recorded by EPA.

Contaminant	Category	Count	Latest
TTHM	MCL	9	2020
Coliform (TCR)	MCL	6	2011
Fluoride	MR	2	2025
Mercury	MR	2	2025
Selenium	MR	2	2025
Barium	MR	2	2025
Chromium	MR	2	2025
Beryllium, Total	MR	2	2025
Nickel	MR	2	2025
Thallium, Total	MR	2	2025
CYANIDE	MR	2	2025
Tetrachloroethylene	MR	2	2024
Arsenic	MR	2	2025
Cadmium	MR	2	2025
Consumer Confidence Rule	Other	2	2010
Antimony, Total	MR	2	2025
Coliform (TCR)	MR	2	2015
Lead and Copper Rule	MR	2	2000

Violation Count vs. the National Corpus

Hanover Water Dept has 51 recorded EPA violations, 57% of the 29,740 public water systems serving 500+ people nationwide carry fewer, and 43% carry more. 29% of this system's own violations are health-based (15 of 51), and it ranks #3,474 of 29,740 by population served among that same cohort.

EPA violations vs. the national water-system corpus

Public water systems serving 500+ people (EPA SDWIS)

51 Around the middle fewer violations than 43% of 29,740 water systems

the national water-system corpus, bucketed by value

Each bar is a band; taller bars hold more water systems. The dashed line + filled bar mark this entry. Hover or tap any bar for its full count and share, and where it sits relative to this entry.

Source EPA SDWIS · 2026-05-15

How many violations vs. how serious, among peer systems

Hanover Water Dept plotted against 29 peer public water systems (500+ people served), by total violation count (x) and the share of those violations that are health-based (y). The crosshair sits at this sample's own median on each axis. A high violation count does not automatically mean a serious record: most monitoring and reporting violations are minor, not health-based.

30 public water systems (500+ people served), EPA SDWIS current release.

How to read this

Each dot is one public water system; the highlighted dot is Hanover Water Dept. A system to the right has more recorded violations; a system higher up has a larger share of those violations classified health-based rather than monitoring or reporting.

Rare but serious: few violations, but most of them are health-based.
Frequent, mostly paperwork: many violations, but mostly monitoring or reporting, not health-based.
Clean record: below-median on both counts, the tinted corner.

View all 30 systems as a list

City of Ballinger: 372 violations, 85% health-based
Nooksack Valley Water Association: 16 violations, 31% health-based
Montgomery Co RWD 12: 7 violations, 29% health-based
Hanover Water Dept: 51 violations, 29% health-based (this system)
Irvin Water District #6: 11 violations, 27% health-based
Ticonderoga WD: 47 violations, 26% health-based
Pine Valley Plantation: 37 violations, 24% health-based
McLouth, City Of: 29 violations, 17% health-based
Kipling Oaks 1: 25 violations, 16% health-based
South Deerfield Water Supply District: 96 violations, 16% health-based
Sunset Ridge Water District: 82 violations, 15% health-based
Orange Water Dept: 136 violations, 14% health-based
Mount Pleasant Water Sys #1: 167 violations, 11% health-based
Lake Gibson Estates: 42 violations, 2% health-based
Benson Culinary Improvement District: 212 violations, 1% health-based
Conemaugh Twp Muni Auth: 567 violations, 1% health-based
Miccosukee Service Plaza: 0 violations, 0% health-based
Brazoria - Fort Bend Counties MUD 3: 0 violations, 0% health-based
Tanglewilde Thompson Place 600: 2 violations, 0% health-based
Center Water Co: 5 violations, 0% health-based
Spring Mills Elem School/Hvs: 9 violations, 0% health-based
Great Bend Industrial Park: 14 violations, 0% health-based
Glen Park Village: 19 violations, 0% health-based
Camp Is-Sho-Da: 22 violations, 0% health-based
Hamilton: 33 violations, 0% health-based
Town of Welaka: 54 violations, 0% health-based
Township of Blairstown Dpw: 61 violations, 0% health-based
McIntosh Water & Fire Pro Authority: 71 violations, 0% health-based
Clarkdale Municipal Water System: 114 violations, 0% health-based
Eureka Water Association: 273 violations, 0% health-based

PFAS Testing Results (UCMR5)

Results from EPA's Fifth Unregulated Contaminant Monitoring Rule. 19 of 174 samples detected PFAS.

Contaminant	Date	Result	MRL	Status
PFPeS	8/22/2023	<4.00 ppt	4.00 ppt	Not Detected
HFPO-DA	8/22/2023	<5.00 ppt	5.00 ppt	Not Detected
PFDA	8/22/2023	<3.00 ppt	3.00 ppt	Not Detected
PFBS	8/22/2023	6.60 ppt	3.00 ppt	Detected
PFHpA	8/22/2023	3.50 ppt	3.00 ppt	Detected
PFHxS	8/22/2023	<3.00 ppt	3.00 ppt	Not Detected
PFNA	8/22/2023	<4.00 ppt	4.00 ppt	Not Detected
PFOS	8/22/2023	11.40 ppt	4.00 ppt	Detected
PFOA	8/22/2023	8.90 ppt	4.00 ppt	Detected
PFDoA	8/22/2023	<3.00 ppt	3.00 ppt	Not Detected
PFHxA	8/22/2023	8.60 ppt	3.00 ppt	Detected
PFUnA	8/22/2023	<2.00 ppt	2.00 ppt	Not Detected
11Cl-PF3OUdS	8/22/2023	<5.00 ppt	5.00 ppt	Not Detected
NMeFOSAA	8/22/2023	<6.00 ppt	6.00 ppt	Not Detected
ADONA	8/22/2023	<3.00 ppt	3.00 ppt	Not Detected
PFTA	8/22/2023	<8.00 ppt	8.00 ppt	Not Detected
PFTrDA	8/22/2023	<7.00 ppt	7.00 ppt	Not Detected
NEtFOSAA	8/22/2023	<5.00 ppt	5.00 ppt	Not Detected
NFDHA	8/22/2023	<20.00 ppt	20.00 ppt	Not Detected
9Cl-PF3ONS	8/22/2023	<2.00 ppt	2.00 ppt	Not Detected
PFHpS	8/22/2023	<3.00 ppt	3.00 ppt	Not Detected
PFBA	8/22/2023	8.00 ppt	5.00 ppt	Detected
PFEESA	8/22/2023	<3.00 ppt	3.00 ppt	Not Detected
6:2 FTS	8/22/2023	<5.00 ppt	5.00 ppt	Not Detected
8:2 FTS	8/22/2023	<5.00 ppt	5.00 ppt	Not Detected
PFMPA	8/22/2023	<4.00 ppt	4.00 ppt	Not Detected
PFMBA	8/22/2023	<3.00 ppt	3.00 ppt	Not Detected
PFPeA	8/22/2023	11.60 ppt	3.00 ppt	Detected
4:2 FTS	8/22/2023	<3.00 ppt	3.00 ppt	Not Detected
NFDHA	8/22/2023	<20.00 ppt	20.00 ppt	Not Detected
HFPO-DA	8/22/2023	<5.00 ppt	5.00 ppt	Not Detected
PFBS	8/22/2023	<3.00 ppt	3.00 ppt	Not Detected
PFHpA	8/22/2023	<3.00 ppt	3.00 ppt	Not Detected
PFHxS	8/22/2023	<3.00 ppt	3.00 ppt	Not Detected
PFNA	8/22/2023	<4.00 ppt	4.00 ppt	Not Detected
PFOS	8/22/2023	<4.00 ppt	4.00 ppt	Not Detected
PFOA	8/22/2023	<4.00 ppt	4.00 ppt	Not Detected
PFDA	8/22/2023	<3.00 ppt	3.00 ppt	Not Detected
PFDoA	8/22/2023	<3.00 ppt	3.00 ppt	Not Detected
PFHxA	8/22/2023	4.30 ppt	3.00 ppt	Detected
PFUnA	8/22/2023	<2.00 ppt	2.00 ppt	Not Detected
11Cl-PF3OUdS	8/22/2023	<5.00 ppt	5.00 ppt	Not Detected
PFHpS	8/22/2023	<3.00 ppt	3.00 ppt	Not Detected
ADONA	8/22/2023	<3.00 ppt	3.00 ppt	Not Detected
NMeFOSAA	8/22/2023	<6.00 ppt	6.00 ppt	Not Detected
PFBA	8/22/2023	<5.00 ppt	5.00 ppt	Not Detected
6:2 FTS	8/22/2023	<5.00 ppt	5.00 ppt	Not Detected
4:2 FTS	8/22/2023	<3.00 ppt	3.00 ppt	Not Detected
8:2 FTS	8/22/2023	<5.00 ppt	5.00 ppt	Not Detected
PFMPA	8/22/2023	<4.00 ppt	4.00 ppt	Not Detected

Health-based violations on Hanover Water Dept

15 health-based rows in the tables above map to MCL or treatment-technique exceedances, verify each contaminant code on the federal SDWIS report for MA4122000.

EPA SDWIS · PWS MA4122000 MA primacy agency

Sources: EPA SDWIS · MassDEP, Drinking Water Program

Nationwide peers

51 violations · 14,984 served: nearest cross-state SDWIS matches.

Cross-state systems near this violation count

Nearest cross-state community systems (500+ served) by total SDWIS violations on record.

4 peers

Cross-state systems with similar served population

Nearest cross-state systems by EPA SDWIS population_served (same 500+ sitemap gate).

4 peers

What to do with Hanover Water Dept

Use this system's EPA-reported record as a starting filter, not a final verdict.

See how every tracked system in Massachusetts compares on the same EPA violation measures. Massachusetts systems
Check whether PFAS was detected at this system under UCMR5 testing. PFAS guide
Find and compare another public water system by name or PWSID. Search systems

EPA SDWIS and UCMR5 figures are informational only, not a substitute for a certified lab test of your own tap water.

Data sourced from EPA SDWIS and UCMR5 PFAS monitoring data. See our methodology for details. Retrieved and formatted by PlainWater

Compiled by PlainWater, Drinking Water Quality Editorial Process · May 15, 2026

Every figure on PlainWater is rendered directly from EPA SDWIS drinking-water data, no number is typed in by an editor. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error.