Community Water System · PWS 083890001
Mandaree Water Plant
Operator location New Town, EPA Region 8 — Tribal Water Systems - 18% of 72 violations are health-based (middle-third health share (≤ 23%)); surface water source; 1,034 served per SDWIS.
- 1,034
- People served (this PWS)
- 72
- EPA violations (this PWS)
- 13
- Health-based (this PWS)
- Untested
- UCMR5 (this PWS)
Mandaree Water Plant standing, mid SDWIS violation third
18% of 72 recorded violations are health-based - middle-third health share (≤ 23%). Corpus terciles use 29,740 systems serving 500+ (the sitemap cohort). Health-based share 18% is middle-third health share (≤ 23%). Population rank #19,123 of 29,740 among systems serving 500+.
The verdict
Mandaree Water Plant lands in the middle third by violation volume (72), large enough for peer comparisons without matching the fleet's heaviest ledgers. Population served is mid-pack at 1,034 (mid served population (≤ 3,309)). Health-based share is 18% (middle-third health share (≤ 23%)). No UCMR5 PFAS test appears for this system in this extract.
- #19,123 of 29,740
- Population · /systems
- #37 of 55
- Population · 08
- 72
- Total EPA violations on record
- 18%
- Health-based (MCL / treatment failure)
Population ordinals match the sitemap cohort (systems serving 500+, population_served DESC). See methodology · corpus placement.
System Details
- System Type
- Community
- Owner Type
- Federal
- Connections
- 321
- School/Daycare
- No
- MCL Violations
- 3
- Monitoring Violations
- 58
- Treatment Tech Violations
- 10
Violation History
Contaminant violations recorded by EPA.
| Contaminant | Category | Count | Latest |
|---|---|---|---|
| Coliform (TCR) | MR | 25 | 2014 |
| CARBON, TOTAL | TT | 6 | 2011 |
| Surface Water Treatment Rule | TT | 4 | 2012 |
| Arsenic | MR | 3 | 1986 |
| Selenium | MR | 3 | 1986 |
| Fluoride | MR | 3 | 1986 |
| Chromium | MR | 3 | 1986 |
| Cadmium | MR | 3 | 1986 |
| Barium | MR | 3 | 1986 |
| Nitrate | MR | 3 | 1986 |
| Mercury | MR | 3 | 1986 |
| TTHM | MCL | 3 | 2011 |
| Lead and Copper Rule | MR | 2 | 2013 |
| Surface Water Treatment Rule | MR | 2 | 2012 |
| Total Haloacetic Acids (HAA5) | MR | 1 | 2015 |
| TTHM | MR | 1 | 2015 |
| 2,4,5-TP | MR | 1 | 1983 |
| Combined Radium (-226 and -228) | MR | 1 | 1976 |
| Gross Alpha, Excl. Radon and U | MR | 1 | 1976 |
Violation Count vs. the National Corpus
Mandaree Water Plant has 72 recorded EPA violations, 66% of the 29,740 public water systems serving 500+ people nationwide carry fewer, and 34% carry more. 18% of this system's own violations are health-based (13 of 72), and it ranks #19,123 of 29,740 by population served among that same cohort.
EPA violations vs. the national water-system corpus
Public water systems serving 500+ people (EPA SDWIS)
72 Around the middle fewer violations than 34% of 29,740 water systems
the national water-system corpus, bucketed by value
Each bar is a band; taller bars hold more water systems. The dashed line + filled bar mark this entry. Hover or tap any bar for its full count and share, and where it sits relative to this entry.
Source EPA SDWIS · 2026-05-15
Health-based violations on Mandaree Water Plant
13 health-based rows in the tables above map to MCL or treatment-technique exceedances, verify each contaminant code on the federal SDWIS report for 083890001.
Sources: EPA SDWIS
Nationwide peers
72 violations · 1,034 served: nearest cross-state SDWIS matches.
Cross-state systems near this violation count
Nearest cross-state community systems (500+ served) by total SDWIS violations on record.
Cross-state systems near this population served
Nearest cross-state systems by EPA SDWIS population_served (same 500+ sitemap gate).
What to do with Mandaree Water Plant
Use this system's EPA-reported record as a starting filter, not a final verdict.
- See how every tracked system in EPA Region 8 — Tribal Water Systems compares on the same EPA violation measures. EPA Region 8 — Tribal Water Systems systems
- Check whether PFAS was detected at this system under UCMR5 testing. PFAS guide
- Find and compare another public water system by name or PWSID. Search systems
EPA SDWIS and UCMR5 figures are informational only, not a substitute for a certified lab test of your own tap water.