Community Water System · PWSID SD4600272

Siphon Hill Water Association

Serves 68 peopleGroundwaterOwner: PrivateRapid City, South Dakota
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On record since 2005: 5 violations. 4 treatment lapses · 1 notice or report. Most recent began 2015-02-01.

For this year's test results, ask the utility for its annual Consumer Confidence Report. Every community system must publish one.

0Over the limit
4Treatment lapse
0Missed or late test
1Notice or report

More violations on record than 67% of active water systems in South Dakota. Small systems with no staff chemist often rack up missed-test violations; big utilities rarely do.

The record, year by year

2005 · Treatment lapse: 120052010 · Treatment lapse: 22010 · Treatment lapse: 22010 · Notice or report: 120102015 · Treatment lapse: 1201520202025
One square = one violation, by the year it began. Empty columns are years with nothing on EPA's record.
80% treatment lapse · 420% notice or report · 1

Across South Dakota, 52% of violations are missed or late tests and 10% are water over a limit.

Lead & copper at the tap

Utilities sample taps in homes most likely to have lead pipes, and report the 90th-percentile result: 9 in 10 homes sampled came in at or below this number. Above the red line (the action level) the utility must act. The action level is not a safe level; EPA's health goal for lead is zero. EPA's file does not date these results, so they are shown highest first.

Lead, 90th percentile 3 results on file · action level 15 ppb

6 ppb
5 ppb
3 ppb

Every violation on record

  1. 2015-02-01DBP Stage 1Treatment Technique No Certif. OperatorBack in compliance
  2. 2010-08-03Groundwater RuleFailure To Address DeficiencyBack in compliance
  3. 2010-05-05Groundwater RuleFailure to Consult with StateBack in compliance
  4. 2010-02-01DBP Stage 1Treatment Technique No Certif. OperatorBack in compliance
  5. 2005-02-01DBP Stage 1Treatment Technique No Certif. OperatorBack in compliance

System details

Population served68
Service connections29
Water sourceGroundwater
System typeCommunity Water System
OwnerPrivate
StatusActive
CityRapid City
EPA ZIP on file57702

Areas served

  • Rapid City, Pennington County, 57702

Reading this record

Siphon Hill Water Association is a community water system that draws from groundwater and serves about 68 people in Rapid City, South Dakota. Everything above comes from the EPA's Safe Drinking Water Information System (SDWIS), where states report every violation by every public water system.

Four kinds of violation. Only one is a measurement of the water: over the limit means a test came back above a legal maximum (an MCL). A treatment lapse means a required protective step was not done, such as disinfection, filtration, fixing a defect an inspector found, or filing a lead-pipe inventory. A missed or late test means a required test was skipped or never reported. That is the most common kind, and the most misread: it does not mean the water was bad, and it does not mean the water was fine. Notices and reports covers public notices and the annual Consumer Confidence Report.

Status. “Back in compliance” means the state recorded a return to compliance. “Period ended” means the violation's compliance period is over but no return to compliance was ever filed, which is common in older records. EPA's federal copy lags state records by months, so call the utility for anything current.