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Public water system record

Aurora

Serves Aurora, Brookings County, SD · 1,200 people served

Federal records show 2 health-based violations and 2 monitoring/reporting issues for Aurora in the last ten years. The most serious issue in this window was a resolved Stage 1 Disinfection Byproducts Rule violation.

  • SD4600058
  • AURORA
  • SD
  • 1,200 served

System profile

Source water Purchased groundwater
ZIP 57002
EPA system ID SD4600058

Verify this system on EPA ECHO →

Health-based violations, last 10 years
2
Resolved
2
Unresolved
0
Any acute record
No
Monitoring issues, last 10 years
2

Key facts

  • Aurora buys its water from Brookings Municipal Utilities.
  • Highest measured level in the last 10 years: Total Trihalomethanes (TTHMs), 0.092 mg/L, federal limit 0.08 mg/L (1.2 times the limit), 2020.
  • Most recent formal enforcement: signed compliance agreement by South Dakota, September 1990.
  • Record on file since 1976, with 1 health-based violation before October 19, 2016.
  • Lead pipe inventory: 0 lead and 243 unknown out of 476 service lines.

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Health-based violations

Since October 2016

Violation data reflects EPA records through March 2026. For the most current status, visit the EPA ECHO database.

Contaminant Rule family Start date Status Acute
Stage 1 Disinfection Byproducts Rule
Treatment technique failure
 210 Aug 17, 2020 Resolved No
Total Trihalomethanes (TTHMs)
Contaminant limit exceeded
Measured 0.092 mg/L, federal limit 0.08 mg/L (1.2 times the limit)
 220 Jul 1, 2020 Resolved No

Monitoring and reporting issues

Since October 2016

Missed tests or reports, not contaminants found above a limit.

Issue Start date Status
Revised Total Coliform Rule
Monitoring violation
 Nov 1, 2020 Resolved
Chlorine
Monitoring and reporting
 Oct 1, 2020 Resolved

Full record since 1976

EPA's records for Aurora go back to 1976. Before October 19, 2016 they list 1 health-based violation (1 resolved) and 8 monitoring or reporting violations.

Violations that began in Health-based Monitoring and reporting
1970s 0 2
1990s 1 5
2000s 0 1
2020s 2 2

Most recent health-based violation before October 19, 2016: Nitrate (acute), began April 1990, Resolved.

Show the health-based violation before October 19, 2016
Contaminant Start date Status
Nitrate (acute)
Contaminant limit exceeded
 Apr 9, 1990 Resolved

Enforcement actions

South Dakota regulators took 1 formal enforcement action against Aurora in 1990. The most recent was a signed compliance agreement in September 1990.

Date By Action Violations covered
Sep 10, 1990 South Dakota Signed compliance agreement 1 violation (1 health-based): Nitrate

What the violations mean

Stage 1 Disinfection Byproducts Rule

1 incident

The system did not meet a treatment requirement of the Stage 1 Disinfectants and Disinfection Byproducts Rule

Byproducts form when disinfectants react with natural material in water. Long-term exposure above federal limits may increase cancer risk

Total Trihalomethanes (TTHMs)

1 incident

Disinfection byproduct levels exceeded the federal limit

Long-term TTHM exposure may increase bladder cancer risk

Where the water comes from

Aurora buys its water from Brookings Municipal Utilities. It lists no wells or intakes of its own.

Buys water from

Annual water quality report

Aurora must give its customers an annual water quality report (Consumer Confidence Report) by July 1, with the levels its tests found in the previous year.

Where the state allows it, systems serving fewer than 10,000 people may publish the report in a local newspaper or news site instead of mailing it, and must provide a copy on request.

Find a posted report with EPA's Consumer Confidence Report search

Testing your own water

To test the water at your tap, or a private well this record does not cover, use a laboratory certified for drinking water by South Dakota.

Certified drinking water labs by state EPA guidance for private wells