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Public water system record

Dewees Utilities

Serves an area of Charleston County, SC · 55 people served

Federal records show 9 health-based violations and 3 monitoring/reporting issues for Dewees Utilities in the last ten years. The most serious issue in this window was a resolved Total Trihalomethanes (TTHMs) violation.

  • SC1050011
  • DEWEES ISLAND
  • SC
  • 55 served

System profile

Source water Groundwater
ZIP 29451
EPA system ID SC1050011

Verify this system on EPA ECHO →

Health-based violations, last 10 years
9
Resolved
9
Unresolved
0
Any acute record
No
Monitoring issues, last 10 years
3

Key facts

  • Dewees Utilities draws water from 3 wells.
  • Highest measured level in the last 10 years: Total Trihalomethanes (TTHMs), 0.156 mg/L, federal limit 0.08 mg/L (2 times the limit), 2022.
  • Most recent formal enforcement: administrative penalty by South Carolina, February 2022.
  • Record on file since 2005, with 0 health-based violations before October 19, 2016.
  • Lead pipe inventory: 0 lead and 0 unknown out of 81 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
Total Trihalomethanes (TTHMs)
Contaminant limit exceeded
Measured 0.086 mg/L, federal limit 0.08 mg/L (1.1 times the limit)
 220 Apr 1, 2024 Resolved No
Total Trihalomethanes (TTHMs)
Contaminant limit exceeded
Measured 0.088 mg/L, federal limit 0.08 mg/L (1.1 times the limit)
 220 Jul 1, 2022 Resolved No
Total Trihalomethanes (TTHMs)
Contaminant limit exceeded
Measured 0.152 mg/L, federal limit 0.08 mg/L (1.9 times the limit)
 220 Apr 1, 2022 Resolved No
Total Trihalomethanes (TTHMs)
Contaminant limit exceeded
Measured 0.156 mg/L, federal limit 0.08 mg/L (2 times the limit)
 220 Jan 1, 2022 Resolved No
Total Trihalomethanes (TTHMs)
Contaminant limit exceeded
Measured 0.137 mg/L, federal limit 0.08 mg/L (1.7 times the limit)
 220 Oct 1, 2021 Resolved No
Total Trihalomethanes (TTHMs)
Contaminant limit exceeded
Measured 0.102 mg/L, federal limit 0.08 mg/L (1.3 times the limit)
 220 Jul 1, 2021 Resolved No
Total Trihalomethanes (TTHMs)
Contaminant limit exceeded
Measured 0.086 mg/L, federal limit 0.08 mg/L (1.1 times the limit)
 220 Jul 1, 2017 Resolved No
Total Trihalomethanes (TTHMs)
Contaminant limit exceeded
Measured 0.091 mg/L, federal limit 0.08 mg/L (1.1 times the limit)
 220 Apr 1, 2017 Resolved No
Total Trihalomethanes (TTHMs)
Contaminant limit exceeded
Measured 0.082 mg/L, federal limit 0.08 mg/L (at or just above the limit)
 220 Jan 1, 2017 Resolved No

Monitoring and reporting issues

Since October 2016

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

Issue Start date Status
Consumer Confidence Rule
OTHER
 Oct 1, 2024 Active
Revised Total Coliform Rule
Monitoring violation
 Jun 1, 2024 Resolved
Chlorine
Monitoring and reporting
 Apr 1, 2024 Resolved

Full record since 2005

EPA's records for Dewees Utilities go back to 2005. Before October 19, 2016 they list no health-based violations and 2 monitoring or reporting violations.

Violations that began in Health-based Monitoring and reporting
2000s 0 2
October 19, 2016 to 2019 3 0
2020s 6 3

Enforcement actions

South Carolina regulators took 4 formal enforcement actions against Dewees Utilities between 2017 and 2022, filed as 6 records in EPA's data. The most recent was an administrative penalty in February 2022.

Date By Action Violations covered
Feb 16, 2022 South Carolina Administrative penalty 10 violations (10 health-based): Total Trihalomethanes (TTHMs)
Feb 16, 2022 South Carolina Compliance order with a penalty 10 violations (10 health-based): Total Trihalomethanes (TTHMs)
Jun 8, 2017 South Carolina Administrative penalty 3 violations (3 health-based): Total Trihalomethanes (TTHMs)
Jun 8, 2017 South Carolina Compliance order with a penalty 3 violations (3 health-based): Total Trihalomethanes (TTHMs)

What the violations mean

Total Trihalomethanes (TTHMs)

9 incidents

Disinfection byproduct levels exceeded the federal limit

Long-term TTHM exposure may increase bladder cancer risk

Where the water comes from

Dewees Utilities draws water from 3 wells. 1 smaller public system such as schools, businesses or campgrounds buys water from Dewees Utilities.

Annual water quality report

Dewees Utilities 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.

Systems serving 500 or fewer people may meet the rule by telling customers the report is available on request, so you may need to ask Dewees Utilities for a copy.

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 Carolina.

Certified drinking water labs by state EPA guidance for private wells