Question 1

Is Mendon Twin Drive IN water safe to drink?

Accepted Answer

Mendon Twin Drive IN (PWS ID: MA2179023) has 78 recorded violations in the EPA SDWIS database. No PFAS contamination was detected in UCMR5 testing. EPA SDWIS lists this system's service population as 1,600 people using Groundwater sources.

Question 2

How many people does Mendon Twin Drive IN serve?

Accepted Answer

EPA SDWIS reports that Mendon Twin Drive IN serves 1,600 people (this public water system's service population, not the municipal population of Allston or any other city). It is a Private-owned system using Groundwater water sources with 4 service connections. The operator address is listed in Allston, Massachusetts.

Question 3

What type of violations does Mendon Twin Drive IN have?

Accepted Answer

Mendon Twin Drive IN has 78 total violations: 2 health-based violations (MCL exceedances or treatment failures), 74 monitoring/reporting violations, and 0 treatment technique violations. Health-based violations indicate contaminant levels exceeded EPA safe limits.

Question 4

Has PFAS been detected in Mendon Twin Drive IN water?

Accepted Answer

No PFAS testing data is available for Mendon Twin Drive IN under the EPA's UCMR5 monitoring program.

Question 5

What water source does Mendon Twin Drive IN use?

Accepted Answer

Mendon Twin Drive IN uses Groundwater as its primary water source. It is classified as a Transient Non-Community Water System, serving transient populations.

Question 6

Where does this data come from?

Accepted Answer

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.

Question 7

Where does Mendon Twin Drive IN sit among U.S. public water systems?

Accepted Answer

According to EPA SDWIS population_served among sitemap-advertised systems (serving 500+), Mendon Twin Drive IN ranks #15,348 of 29,740 by people served, and #300 of 418 in Massachusetts. Ordinals use population_served DESC among systems serving 500+ (the sitemap cohort). See /methodology#corpus-placement.

Question 8

How does Mendon Twin Drive IN's violation count compare nationally?

Accepted Answer

Mendon Twin Drive IN has 78 recorded EPA SDWIS violations, fewer than 32% of the 29,740 public water systems serving 500 or more people nationwide (the same sitemap cohort used for the corpus-placement ranking above). 68% of that cohort has fewer violations than Mendon Twin Drive IN. 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.

Contaminant	Category	Count	Latest
Coliform (TCR)	MR	8	2013
Revised Total Coliform Rule	MON	4	2018
Endrin	MR	2	2012
ETHYLENE DIBROMIDE	MR	2	2012
Heptachlor epoxide	MR	2	2012
Heptachlor	MR	2	2012
Toxaphene	MR	2	2012
Methoxychlor	MR	2	2012
Total Polychlorinated Biphenyls (PCB)	MR	2	2012
1,2-DIBROMO-3-CHLOROPROPANE	MR	2	2012
Benzo(a)pyrene	MR	2	2012
Dalapon	MR	2	2012
Dinoseb	MR	2	2012
Diquat	MR	2	2012
Endothall	MR	2	2012
Glyphosate	MR	2	2012
Hexachlorocyclopentadiene	MR	2	2012
OXAMYL	MR	2	2012
Picloram	MR	2	2012
2,3,7,8-TCDD	MR	2	2012
Coliform (TCR)	MCL	2	2014
LASSO	MR	2	2012
Atrazine	MR	2	2012
Carbofuran	MR	2	2012
HEXACHLOROBENZENE	MR	2	2012
Di(2-ethylhexyl) phthalate	MR	2	2012
2,4,5-TP	MR	2	2012
Pentachlorophenol	MR	2	2012
Chlordane	MR	2	2012
Nitrate	MR	2	2012

Mendon Twin Drive IN

Mendon Twin Drive IN standing, high SDWIS violation third

System Details

Violation History

Violation Count vs. the National Corpus

SDWIS compliance record for Mendon Twin Drive IN

Nationwide peers

Cross-state systems with comparable violation load

Cross-state systems near this population served