Oglala Lakota, SD

Compiled by PlainEnviro Editorial, Environmental Data Editorial Team · July 13, 2026

Low Risk (15/100)

A PlainEnviro-computed score from reported facility/violation counts, not an official EPA rating, health forecast, or population-adjusted rate. See methodology.

Environmental data for Oglala Lakota in South Dakota · Population: 13,587

Oglala Lakota, SD is tracked across three EPA datasets covering 0 Toxics Release Inventory (TRI) facilities, 22 Safe Drinking Water Act systems, and 0 Superfund National Priorities List sites. Together these generate an environmental burden score of 15/100 (Low Risk), calibrated against national distributions for facility density, chemical release volume, Superfund concentration, and water-system health violations.

Industrial disclosures inside the county total 0 lbs of reported toxic releases under EPCRA Section 313, while 13 water systems carry an active health-based violation in the SDWIS record. No EPA Air Quality System monitors currently report data for this county.

All figures below draw directly from federal EPA records, TRI self-reported emissions, SDWIS compliance history, NPL Hazard Ranking System scores, and AQS daily AQI summaries, and are not adjusted, weighted, or forecast. A past violation or elevated score does not itself indicate current unsafe conditions; it documents the regulatory and disclosure history publicly filed with the U.S. Environmental Protection Agency through the most recent reporting cycle.

Population

13,587

TRI Facilities

Water Systems

Superfund Sites

Total Releases

0 lbs

Water Systems (22)

System	City	Source	Population	Violations	Health
PINE RIDGE WATER SYSTEM	Pine Ridge	Groundwater	7,482	3	Yes
KYLE WATER SYSTEM	Pine Ridge	Surface Water	6,526	2	Yes
OGLALA RWS PIPELINE	Pine Ridge	Groundwater	3,562	1	Yes
WANBLEE EAST	Pine Ridge	Surface Water	2,179	5	Yes
WHITE HORSE CREEK WATER SYSTEM	Pine Ridge	Groundwater	1,690	0	–
WOLF CREEK SCHOOL	Batesland	Groundwater	1,450	0	–
LAKOTA TECH HIGH SCHOOL	Batesland	Groundwater	1,250	0	–
WANBLEE WATER SYSTEM	Pine Ridge	Surface Water	773	0	–
RED CLOUD SCHOOL	Pine Ridge	Groundwater	501	1	Yes
ALLEN WATER SYSTEM	Pine Ridge	Surface Water	420	0	–
SUNRISE WATER SYSTEM	Pine Ridge	Groundwater	380	0	–
PINE RIDGE HOSPITAL	Pine Ridge	Groundwater	316	2	Yes
WOUNDED KNEE DISTRICT SCHOOL	Manderson	Surface Water	280	3	Yes
WOUNDED KNEE WATER SYSTEM	Pine Ridge	Surface Water	255	3	Yes
EAGLE NEST HOMES	Pine Ridge	Surface Water	195	0	–
BUFFALO GAP	Buffalo Gap	Groundwater	126	13	Yes
RED ROCKS WATER SYSTEM	Pine Ridge	Surface Water	125	0	–
POTATO CREEK WATER SYSTEM	Pine Ridge	Surface Water	95	0	–
NORTH MARTIN WATER SYSTEM	Pine Ridge	Groundwater	78	14	Yes
WAKPAMNI WATER SYSTEM	Pine Ridge	Surface Water	70	2	Yes
WOLF CREEK WATER SYSTEM	Pine Ridge	Surface Water	65	1	Yes
NORTH ALLEN WATER SYSTEM	Pine Ridge	Surface Water	37	2	Yes

Frequently Asked Questions

What is the environmental risk level in Oglala Lakota, South Dakota? ▼

Oglala Lakota, SD has an environmental risk score of 15/100 (Low Risk), based on 0 TRI facilities, 0 Superfund sites, and 22 water systems on record. 13 water systems have health-based violations. Source: EPA TRI, SDWIS, and Superfund NPL.

Are there Superfund sites in Oglala Lakota? ▼

No Superfund National Priorities List (NPL) sites are currently registered in Oglala Lakota, SD in the EPA database.

How many toxic release facilities are in Oglala Lakota? ▼

Oglala Lakota, SD has 0 TRI-reporting facilities on record with the EPA Toxic Release Inventory. TRI facilities self-report annual chemical release data to the EPA.

What is the air quality in Oglala Lakota? ▼

Air quality monitoring data (EPA AQS) is not available for Oglala Lakota, SD. This may indicate no EPA monitoring stations are located in the county. For regional air quality data, see the state environmental profile or visit EPA's AirNow.gov.

Is the drinking water safe in Oglala Lakota? ▼

Oglala Lakota, SD has 22 EPA-regulated water systems. 13 systems have reported health-based violations (MCL exceedances). A past violation does not necessarily mean water is currently unsafe. For current water quality, contact your local water utility. Source: EPA SDWIS.

What environmental agencies cover Oglala Lakota? ▼

Environmental compliance in Oglala Lakota, South Dakota is overseen by the U.S. Environmental Protection Agency (EPA) at the federal level and the South Dakota state environmental agency. Facilities report to the EPA Toxic Release Inventory, water systems are regulated under the Safe Drinking Water Act, and contaminated sites are managed under the Superfund program. Contact your state environmental agency for local concerns.

What does this county environmental profile show?

This county environmental profile rolls up EPA Toxics Release Inventory facility reports, Safe Drinking Water Information System public-water-system filings, and Superfund National Priorities List sites for the county boundary defined by the U.S. Census Bureau. Facility counts reflect facilities with a reporting address inside the county, not where downstream environmental effects may be observed. Population figures are from the most recent Census ACS 5-year estimate. The county detail page is updated whenever the upstream EPA programs publish revised data; see the methodology page for the documented ingest cadence and the editorial choices governing how aggregations are computed.

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

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Data sourced from U.S. EPA environmental datasets. See our methodology for details. Retrieved and formatted by PlainEnviro Editorial