01The verdict: is Agency Village water safe?
Agency Village's drinking water has significant quality concerns based on EPA testing data. With a grade of B (76/100), the system has issues across multiple categories. A water filter is recommended for all residents. The city's 7 water systems serve approximately 2,019 residents using groundwater (wells).
10 unresolved violations on record
EPA records show open compliance items for this system. Most are administrative, but unresolved items are worth watching.
See what was cited ↓Lead is well under the limit
90th-percentile lead is 0.4 ppb — beneath the 15 ppb federal action level and under the 5 ppb watch threshold.
See the trend ↓3 violations in the last five years
Recent compliance history is the best predictor of future problems — the year-by-year record is below.
See the record ↓Agency Village's drinking water received a grade of B (76 out of 100), indicating good water quality. The city's 7 water systems serve approximately 2,019 residents using purchased ground water.
Lead levels were measured at 0.4 ppb (90th percentile), well within EPA limits. This system has not yet been tested for PFAS under the EPA UCMR 5 program. The system has 166 violations on record, including 8 health-based violations. 10 remain unresolved.
Agency Village ranks #110 out of 137 cities in South Dakota for water quality, placing it among the lowest-rated in the state. Agency Village purchases its water from a regional wholesaler, meaning quality depends on both the supplier's treatment and the local distribution system's condition. As a small community water system, Agency Village may have fewer resources for advanced treatment technologies and infrastructure upgrades compared to larger utilities.
02What's in Agency Village's water
Every contaminant flagged in Agency Village, on one shared scale: distance to its own legal limit. The red line is the limit — anything past it is out of compliance, and the closer a bar gets, the less headroom the system has.
Full contaminants report
| Contaminant | Detected Level | EPA Limit | Unit | Category | Status |
|---|---|---|---|---|---|
| Lead (90th percentile) LeadHeavy Metal A toxic heavy metal that can leach into drinking water from older pipes, solder, and fixtures. No amount of lead in water is considered safe. Health EffectsBrain and nervous system damage in children, kidney damage, high blood pressure, and reproductive problems in adults. EPA Limit15 ppb action level Common SourcesCorrosion of lead pipes, lead solder, brass faucets, and household plumbing. | 0.4 | 15 | ppb | Inorganic | Safe |
Cities ranked by 90th-percentile lead PF PFAS in South Dakota
Cities ranked by compounds detected Cu Copper in South Dakota
Cities ranked by 90th-percentile copper
03Agency Village's ten-year track record
Each box is one year. A green check means no EPA violations; a numbered badge counts that year's violations — red if any were health-based, amber if they were monitoring or paperwork issues. The system has 166 violations on record, including 8 health-based violations. 10 remain unresolved.
6 of the last ten years were clean. The numbered years had EPA violations — red when any were health-based, amber when they were paperwork or missed-testing issues.
▼ Down 0.69 ppb since 2005. Latest reading: 0.31 ppb (2024) — 2% of the action level. Sampled at higher-risk homes (90th percentile).
04Where Agency Village's water comes from
Agency Village purchases its water supply from a regional wholesale provider rather than treating raw water directly.
Purchased Groundwater
Water is bought from a regional wholesaler; quality starts at the supplier's intake and treatment.
Wholesale supplier
Primary treatment happens at the wholesaler; the local utility maintains disinfectant residual in its pipes.
7 systems
7 water systems, operated under native american ownership.
2,019 people
Residents served across Agency Village's service area.
Water quality depends on both the wholesaler's treatment standards and the condition of Agency Village's local distribution pipes and storage facilities. Purchased water systems are common in suburban areas and smaller communities that lack the infrastructure for independent treatment. The system is operated by native american ownership and serves approximately 2,019 people through 7 water systems.
| System name | PWSID | Population | Source |
|---|---|---|---|
| OLD AGENCY WATER SYSTEM | 084690458 | 1,180 | Purchased Groundwater |
| LONG HOLLOW WATER SYSTEM | 084690457 | 265 | Purchased Groundwater |
| ENEMY SWIM WATER SYSTEM | 084690460 | 230 | Purchased Surface Water |
| PEEVER FLATS WATER SYSTEM | 084690461 | 129 | Purchased Groundwater |
| RED IRON LAKE WATER SYSTEM | 084690456 | 95 | Purchased Groundwater |
| FINLEY HEIGHTS WATER SYSTEM | 084690462 | 60 | Purchased Groundwater |
| VEBLEN FLATS | 084690463 | 60 | Purchased Groundwater |
Water bodies near Agency Village
These water bodies shape the regional watershed and can indirectly affect groundwater quality.
05Pressure on Agency Village's watershed
Outside forces that shape what reaches the treatment plant. None of these is a verdict on the tap by itself — but each adds pressure worth knowing about.
Industrial discharge
1 facility within 10 miles reported 0 lb released to surface water in the latest EPA Toxics Release Inventory. Proximity doesn't equal tap contamination — treatment and hydrology decide — but it's pressure on the watershed.
Flood & storm history
10 federal disaster declarations on record for Roberts County. Flooding and severe storms can overwhelm treatment plants, cause sewage overflows, and push runoff into supplies.
06How Agency Village compares
Scores for nearby South Dakota cities on one line, with the average marked.
dashed line = South Dakota average (66/100)
Agency Village scores 76/100 — above the South Dakota average of 66/100. It outscores 6 of 10 nearby cities. Full South Dakota rankings →
58.2 / 100FRapid City, SD
38.7 / 100FAberdeen, SD
41.8 / 100AWatertown, SD
91 / 100FPine Ridge, SD
43.2 / 100DBrookings, SD
46.2 / 100
07What to do at home
Steps matched to what testing actually found in Agency Village's water — not generic advice.
A basic carbon filter still helps
Agency Village's water meets federal standards, but a simple carbon filter improves taste and adds a margin of safety against short-term issues.
Compare tested filters →Read your utility's annual report
Every utility must publish a yearly Consumer Confidence Report with its own testing results. It pairs well with the independent data on this page.
How to read a CCR →Watch for Agency Village alerts
This area has a history of flood declarations — after severe weather, watch for boil-water advisories from the utility, and check the live alerts on this page.
All water alerts →Frequently asked questions
Is Agency Village, SD tap water safe to drink?
Agency Village's water quality earned a grade of B (76/100). Some concerns have been identified. Consider a water filter for an extra layer of protection. The city ranks #110 out of 137 cities tested in South Dakota.
What contaminants are in Agency Village's water?
Lead was measured at 0.4 ppb (90th percentile). 166 violations are on record.
How is Agency Village's water quality grade calculated?
The grade is based on four factors: violation history (40%), lead and copper levels (25%), PFAS contamination (25%), and regulatory compliance (10%). The score is also adjusted based on how complete the available data is. See our methodology page for full details.
Do I need a water filter in Agency Village?
Based on current data, basic filtration should suffice for additional peace of mind.
Where does Agency Village's water come from?
Agency Village's water is sourced from Purchased ground water. The city has 7 water systems serving approximately 2,019 residents.
What health violations has Agency Village's water system had?
Agency Village has 8 health-based violations on record. The most recent violation was recorded in August 2024. Health-based violations mean the water exceeded EPA maximum contaminant levels (MCLs) for a regulated substance. 10 violations remain unresolved.
Is Agency Village's groundwater at risk of contamination?
Agency Village uses groundwater, which can be affected by naturally occurring contaminants like arsenic, radon, and nitrate, as well as agricultural runoff and industrial activity. The system has 166 violations on record that may relate to groundwater quality. Groundwater systems are generally less susceptible to surface contamination but should be monitored for emerging contaminants like PFAS.
How does Agency Village's water compare to other cities?
Agency Village ranks #110 out of 137 cities in South Dakota (better than 20% of state cities) and #9314 out of 15382 cities nationally (40th percentile). The grade of B reflects the combined assessment of violation history, lead and copper levels, PFAS contamination, and regulatory compliance.