Public water system record
Centennial Estates
Serves an area of Rockingham County, NH · 140 people served
Federal records show 1 health-based violation and no monitoring/reporting issues for Centennial Estates in the last ten years. The most serious issue in this window was a resolved Nitrate violation.
System profile
- Health-based violations, last 10 years
- 1
- Resolved
- 1
- Unresolved
- 0
- Any acute record
- Yes
- Monitoring issues, last 10 years
- 0
Key facts
- Centennial Estates draws water from 1 well.
- Highest measured level in the last 10 years: Nitrate, 11.6 mg/L, federal limit 10 mg/L (1.2 times the limit), 2023.
- Most recent enforcement action: boil water order by New Hampshire, September 1991.
- Record on file since 1991, with 3 health-based violations before October 19, 2016.
Check whether Centennial Estates serves your address
Health-based violations
Since October 2016Violation data reflects EPA records through March 2026. For the most current status, visit the EPA ECHO database.
| Contaminant | Rule family | Start date | Status | Acute |
|---|---|---|---|---|
|
Nitrate
Contaminant limit exceeded
Measured 11.6 mg/L, federal limit 10 mg/L (1.2 times the limit)
|
330 | Jul 1, 2023 | Resolved | Yes |
Full record since 1991
EPA's records for Centennial Estates go back to 1991. Before October 19, 2016 they list 3 health-based violations (2 resolved, 1 archived by EPA without a recorded fix) and 72 monitoring or reporting violations.
| Violations that began in | Health-based | Monitoring and reporting |
|---|---|---|
| 1990s | 2 | 24 |
| 2000s | 0 | 40 |
| 2010 to October 18, 2016 | 1 | 8 |
| 2020s | 1 | 0 |
Most recent health-based violation before October 19, 2016: Total Coliform, began August 2012, Resolved.
Show all 3 health-based violations before October 19, 2016
| Contaminant | Start date | Status |
|---|---|---|
|
Total Coliform
Contaminant limit exceeded
|
Aug 1, 2012 | Resolved |
|
Total Coliform
Contaminant limit exceeded
|
Apr 1, 1995 | Archived |
|
Total Coliform (acute)
Contaminant limit exceeded
|
Sep 1, 1991 | Resolved |
Enforcement actions
New Hampshire regulators issued 1 boil water order to Centennial Estates in 1991. The most recent was a boil water order in September 1991.
| Date | By | Action | Violations covered |
|---|---|---|---|
| Sep 30, 1991 | New Hampshire | Boil water order | 1 violation (1 health-based): Total Coliform |
What the violations mean
Nitrate
1 incidentNitrate exceeded the federal limit
High nitrate is especially dangerous for infants under 6 months and can cause blue baby syndrome
Where the water comes from
Centennial Estates draws water from 1 well.
Annual water quality report
Centennial Estates 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 Centennial Estates 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 New Hampshire.
Certified drinking water labs by state EPA guidance for private wells