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Community Water System · PWS SD4600072

Southbrook Estates

Brookings, South Dakota 57006 - drinking water served from groundwater sources to 28 people, tracked in EPA SDWIS and UCMR5.

28
People served
2,183
EPA violations
19
Health-based
Untested
UCMR5 result

The verdict

EPA records 2,183 drinking-water violations at Southbrook Estates, 1% of them health-based - above the South Dakota per-system average.

2,183
Total EPA violations on record
1%
Health-based (MCL / treatment failure)
28
People served by this system
N/A
PFAS compounds detected (UCMR5)

Water Quality Snapshot: Southbrook Estates

Southbrook Estates is a private-owned community water system that delivers drinking water to 28 residents in Brookings, South Dakota (Brookings County) through 8 service connections. Its water is drawn from groundwater sources. EPA's Safe Drinking Water Information System records 2,183 total violations for this system , of which 19 (1%) are health-based, meaning a contaminant exceeded an EPA Maximum Contaminant Level or a required treatment technique failed. A further 2,097 monitoring and reporting violations are on file. The most recent violation on record dates to 2021.

The most frequently cited contaminant at this system is Coliform (TCR), recorded in 54 violations (MR). This system has not yet been sampled under EPA's UCMR5 PFAS monitoring program, so no PFAS detection data is available here.

Across South Dakota, EPA tracks 654 public water systems serving 915,901 people, with 56,254 cumulative violations and 8,399 health-based violations on record. About 92% of systems in the state carry at least one violation, and state-wide the average per system is 86 violations. Statewide, 42 of 49 UCMR5-tested systems have reported PFAS detections (85.7%).

Southbrook Estates's 2,183 violations sit above the South Dakota average.

All figures above are sourced directly from EPA SDWIS and UCMR5 public data releases and are updated as EPA publishes new reporting cycles.

Population Served
28
Total Violations
2,183
Health-Based Violations
19
Water Source
Groundwater

System Details

System Type
Community
Owner Type
Private
Connections
8
County
Brookings
School/Daycare
No
MCL Violations
11
Monitoring Violations
2,097
Treatment Tech Violations
8

Violation History

Contaminant violations recorded by EPA.

Contaminant Category Count Latest
Coliform (TCR) MR 54 2015
LASSO MR 49 2011
Methoxychlor MR 49 2011
Total Polychlorinated Biphenyls (PCB) MR 49 2011
Di(2-ethylhexyl) phthalate MR 49 2011
HEXACHLOROBENZENE MR 49 2011
BHC-GAMMA MR 49 2011
Chlordane MR 49 2011
Toxaphene MR 49 2011
OXAMYL MR 49 2011
Dalapon MR 49 2011
Picloram MR 49 2011
ETHYLENE DIBROMIDE MR 49 2011
Glyphosate MR 49 2011
Heptachlor MR 49 2011
Heptachlor epoxide MR 49 2011
Atrazine MR 49 2011
Benzo(a)pyrene MR 49 2011
Di(2-ethylhexyl) adipate MR 49 2011
Hexachlorocyclopentadiene MR 49 2011
Simazine MR 49 2011
Carbofuran MR 49 2011
Dinoseb MR 49 2011
2,4,5-TP MR 49 2011
Pentachlorophenol MR 49 2011
1,2-DIBROMO-3-CHLOROPROPANE MR 49 2011
Endothall MR 49 2011
Diquat MR 49 2011
2,4-D MR 49 2011
Endrin MR 49 2011

Verify This Water System

The figures above are aggregated from EPA's public databases. To verify the underlying records, or to file a complaint, request a Consumer Confidence Report, or check current monitoring status, go directly to the federal and state regulators that enforce the Safe Drinking Water Act for Southbrook Estates.

Federal Source of Truth

EPA SDWIS, Federal Reports

EPA's Safe Drinking Water Information System (SDWIS) holds the federal compliance record for every regulated public water system. Open the system-level report by PWS ID:

View PWS ID SD4600072 on SDWIS

Source: EPA SDWIS Federal Reports Search

State Regulator

South Dakota Drinking Water Authority

South Dakota's primacy agency administers the Safe Drinking Water Act locally. Search EPA SDWIS for the current state contact, or use the state's public health or environment department portal.

Find SD regulator via EPA SDWIS

Violation Timeline

Each row links to the EPA SDWIS public record for verification. Cross-reference the contaminant code on EPA's federal report to see violation dates, return-to-compliance status, and enforcement actions.

Year (latest) Contaminant Category Count EPA Record
2021 Toluene MR 26 SDWIS / SD4600072 / 2991
2021 cis-1,2-Dichloroethylene MR 22 SDWIS / SD4600072 / 2380
2021 Tetrachloroethylene MR 22 SDWIS / SD4600072 / 2987
2021 Ethylbenzene MR 22 SDWIS / SD4600072 / 2992
2021 DICHLOROMETHANE MR 22 SDWIS / SD4600072 / 2964
2021 1,2,4-Trichlorobenzene MR 22 SDWIS / SD4600072 / 2378
2021 Xylenes, Total MR 22 SDWIS / SD4600072 / 2955
2021 1,1-Dichloroethylene MR 22 SDWIS / SD4600072 / 2977
2021 Carbon tetrachloride MR 22 SDWIS / SD4600072 / 2982
2021 Styrene MR 22 SDWIS / SD4600072 / 2996
2021 1,2-Dichloropropane MR 22 SDWIS / SD4600072 / 2983
2021 Benzene MR 22 SDWIS / SD4600072 / 2990
2021 p-Dichlorobenzene MR 22 SDWIS / SD4600072 / 2969
2021 1,2-Dichloroethane MR 22 SDWIS / SD4600072 / 2980
2021 Trichloroethylene MR 22 SDWIS / SD4600072 / 2984

How Southbrook Estates Compares

Cross-reference this system's record against state averages and the federal MCL framework for context.

Metric Southbrook Estates South Dakota avg Federal benchmark
Total violations 2,183 86 SDWA compliance, any non-zero count is a recorded breach
Health-based violations 19 12.8 Indicates a contaminant exceeded a federal MCL
PFAS detection None 85.7% EPA final rule (2024): PFOA/PFOS MCL = 4.0 ppt
Population served 28 1,400 Sizing context for compliance burden

Sources: EPA SDWIS and EPA National Primary Drinking Water Regulations (40 CFR Part 141). State averages computed across 654 regulated public water systems in South Dakota.

Federal MCL reference, Safe Drinking Water Act thresholds ▼
Contaminant Federal MCL / Action Level Note
Lead 0 mg/L (Action Level: 0.015 mg/L) Lead and Copper Rule treatment technique
Arsenic 0.010 mg/L (10 ppb) Health-based MCL since 2006
Total Coliform Treatment technique (RTCR) Indicator organism, monitoring trigger
PFOA / PFOS (PFAS) 4.0 ppt each (final 2024 rule) Compliance deadline 2029 (EPA proposed extending to 2031, not yet final as of May 2026)
Nitrate (as N) 10 mg/L Acute health risk for infants

Frequently Asked Questions

Is Southbrook Estates water safe to drink? ▼
Southbrook Estates (PWS ID: SD4600072) has 2183 recorded violations in the EPA SDWIS database. No PFAS contamination was detected in UCMR5 testing. This system serves 28 people using Groundwater sources.
How many people does Southbrook Estates serve? ▼
Southbrook Estates serves 28 people in Brookings, South Dakota. It is a Private-owned system using Groundwater water sources with 8 service connections.
What type of violations does Southbrook Estates have? ▼
Southbrook Estates has 2,183 total violations: 19 health-based violations (MCL exceedances or treatment failures), 2,097 monitoring/reporting violations, and 8 treatment technique violations. Health-based violations indicate contaminant levels exceeded EPA safe limits.
Has PFAS been detected in Southbrook Estates water? ▼
No PFAS testing data is available for Southbrook Estates under the EPA's UCMR5 monitoring program.
What water source does Southbrook Estates use? ▼
Southbrook Estates uses Groundwater as its primary water source. It is classified as a Community Water System (CWS), serving residential populations year-round.
Where does this data come from? ▼
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.
Data Sources: EPA Safe Drinking Water Information System (SDWIS), Q4 2025. This data is provided for informational purposes only.

Read our methodology - how this data is sourced, computed, and verified.

Data sourced from EPA SDWIS and UCMR5 PFAS monitoring data. See our methodology for details. Retrieved and formatted by PlainWater Editorial

Every figure on PlainWater is rendered directly from EPA SDWIS drinking-water data, no number is typed in by an editor. This system's figures are rendered directly from EPA SDWIS data, no figure is typed in by an editor. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error.