Question 1

Is Parker water safe to drink?

Accepted Answer

Parker (PWS ID: SD4600235) has 86 recorded violations in the EPA SDWIS database. No PFAS contamination was detected in UCMR5 testing. EPA SDWIS lists this system's service population as 1,025 people using Groundwater sources.

Question 2

How many people does Parker serve?

Accepted Answer

EPA SDWIS reports that Parker serves 1,025 people (this public water system's service population, not the municipal population of Parker or any other city). It is a Local-owned system using Groundwater water sources with 505 service connections. The operator address is listed in Parker, South Dakota.

Question 3

What type of violations does Parker have?

Accepted Answer

Parker has 86 total violations: 7 health-based violations (MCL exceedances or treatment failures), 71 monitoring/reporting violations, and 4 treatment technique violations. Health-based violations indicate contaminant levels exceeded EPA safe limits.

Question 4

Has PFAS been detected in Parker water?

Accepted Answer

No PFAS testing data is available for Parker under the EPA's UCMR5 monitoring program.

Question 5

What water source does Parker use?

Accepted Answer

Parker uses Groundwater 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

Where does Parker sit among U.S. public water systems?

Accepted Answer

According to EPA SDWIS population_served among sitemap-advertised systems (serving 500+), Parker ranks #19,199 of 29,740 by people served, and #102 of 171 in South Dakota. Ordinals use population_served DESC among systems serving 500+ (the sitemap cohort). See /methodology#corpus-placement.

Question 8

How does Parker's violation count compare nationally?

Accepted Answer

Parker has 86 recorded EPA SDWIS violations, fewer than 30% of the 29,740 public water systems serving 500 or more people nationwide (the same sitemap cohort used for the corpus-placement ranking above). 70% of that cohort has fewer violations than Parker. 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
Stage 1 Disinfectants and Disinfection Byproducts Rule	TT	4	2010
Coliform (TCR)	MCL	3	1995
Consumer Confidence Rule	Other	2	2007
LASSO	MR	2	2008
Heptachlor epoxide	MR	2	2008
Benzo(a)pyrene	MR	2	2008
Methoxychlor	MR	2	2008
Di(2-ethylhexyl) phthalate	MR	2	2008
Hexachlorocyclopentadiene	MR	2	2008
Endrin	MR	2	2008
HEXACHLOROBENZENE	MR	2	2008
BHC-GAMMA	MR	2	2008
Chlordane	MR	2	2008
Toxaphene	MR	2	2008
Simazine	MR	2	2008
OXAMYL	MR	2	2008
Dalapon	MR	2	2008
Dinoseb	MR	2	2008
Pentachlorophenol	MR	2	2008
Picloram	MR	2	2008
Endothall	MR	2	2008
Arsenic	MR	2	1988
2,4-D	MR	2	2008
1,2-DIBROMO-3-CHLOROPROPANE	MR	2	2008
ETHYLENE DIBROMIDE	MR	2	2008
2,4,5-TP	MR	2	2008
Carbofuran	MR	2	2008
Asbestos	MR	2	1993
Glyphosate	MR	2	2008
Total Polychlorinated Biphenyls (PCB)	MR	2	2008

Parker

Parker standing, high SDWIS violation third

System Details

Violation History

Violation Count vs. the National Corpus

SDWIS compliance record for Parker

Nationwide peers

Cross-state systems with comparable violation load

Cross-state systems near this population served