Question 1

Is Twenty Mile Creek Water Assn water safe to drink?

Accepted Answer

Twenty Mile Creek Water Assn (PWS ID: ID1110030) has 135 recorded violations in the EPA SDWIS database. No PFAS contamination was detected in UCMR5 testing. EPA SDWIS lists this system's service population as 225 people using Surface Water sources.

Question 2

How many people does Twenty Mile Creek Water Assn serve?

Accepted Answer

EPA SDWIS reports that Twenty Mile Creek Water Assn serves 225 people (this public water system's service population, not the municipal population of Bonners Ferry or any other city). It is a Private-owned system using Surface Water water sources with 89 service connections. The operator address is listed in Bonners Ferry, Idaho.

Question 3

What type of violations does Twenty Mile Creek Water Assn have?

Accepted Answer

Twenty Mile Creek Water Assn has 135 total violations: 106 health-based violations (MCL exceedances or treatment failures), 21 monitoring/reporting violations, and 98 treatment technique violations. Health-based violations indicate contaminant levels exceeded EPA safe limits.

Question 4

Has PFAS been detected in Twenty Mile Creek Water Assn water?

Accepted Answer

No PFAS testing data is available for Twenty Mile Creek Water Assn under the EPA's UCMR5 monitoring program.

Question 5

What water source does Twenty Mile Creek Water Assn use?

Accepted Answer

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

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

How does Twenty Mile Creek Water Assn's violation count compare nationally?

Accepted Answer

Twenty Mile Creek Water Assn has 135 recorded EPA SDWIS violations, fewer than 21% of the 29,740 public water systems serving 500 or more people nationwide (the same sitemap cohort used for the corpus-placement ranking above). 79% of that cohort has fewer violations than Twenty Mile Creek Water Assn. 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
Surface Water Treatment Rule	TT	85	2000
Interim Enhanced Surface Water Treatment Rule	TT	13	2018
TTHM	MCL	6	2024
Coliform (TCR)	MR	5	2002
Nitrate	MR	2	2000
Coliform (TCR)	MCL	2	2002
2,4-D	MR	1	1979
2,4,5-TP	MR	1	1979
Barium	MR	1	1979
Cadmium	MR	1	1979
Chromium	MR	1	1979
Endrin	MR	1	1979
Toxaphene	MR	1	1979
Arsenic	MR	1	1979
Selenium	MR	1	1979
Gross Alpha, Excl. Radon and U	MR	1	1979
Methoxychlor	MR	1	1979
Mercury	MR	1	1979
BHC-GAMMA	MR	1	1979
Fluoride	MR	1	1979

Twenty Mile Creek Water Assn

Twenty Mile Creek Water Assn standing, high SDWIS violation third

System Details

Violation History

Violation Count vs. the National Corpus

Health-based violations on Twenty Mile Creek Water Assn

Nationwide peers

Cross-state systems with comparable violation load