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Tap water quality report

Rock Rimmon Cooperative

EPA monitoring tested this supplier for 76 contaminants and detected 16. A detection doesn't automatically mean the water is unsafe — the level and EPA source for each is below.

76
contaminants tested
16
detected
200
people served
92
health-based violations
New Hampshire rankingsLead in New HampshirePFAS in New Hampshire
Water source
Ground water
Ownership
Private
Counties served
Rockingham

Compliance record

Formal violations the EPA has on file for this supplier. A health-based violation means a contaminant limit or a required treatment was breached; the rest are monitoring or reporting failures — still violations, but not a measured health risk.

92
health-based violations
184
violations on file
0
still open
ViolationTypeStatusPeriod
TT Health-based Resolved 2021-11-01 → 2021-12-01
TT Health-based Resolved 2021-11-01 → 2021-12-01
TT Health-based Resolved 2021-11-01 → 2021-12-01
TT Health-based Resolved 2021-11-01 → 2021-12-01
TT Health-based Resolved 2019-10-01 → 2019-11-01
TT Health-based Resolved 2019-10-01 → 2019-11-01
TT Health-based Resolved 2019-10-01 → 2019-11-01
TT Health-based Resolved 2019-10-01 → 2019-11-01
TT Health-based Resolved 2018-09-01
TT Health-based Resolved 2018-09-01

Other contaminants detected

Each bar shows the measured level as a share of the EPA limit: green is well under, amber is close to it, red is over. For lead and copper the limit applies to exactly the 90th-percentile figure shown, so red there means a real exceedance. For everything else the limit applies to a running annual average while the figure is the 95th percentile of this system's samples — over 100% is worth reading, but is not by itself a violation. Where a single sample came in higher than that percentile, it is noted under the bar. Formal violations are listed separately.
ContaminantLevel vs EPA limitDetection rateSourcePeriod
Copper
194.1 µg/L 15%
of the EPA limit 1300 µg/L
worst single sample: 765 µg/L
24/37 SYR4 2015–2019
Combined Radium (-226 And -228)
6.685 pCi/L 134%
of the EPA limit, at the 95th percentile of samples — 5 pCi/L
worst single sample: 7.5 pCi/L
24/24 SYR4 2014–2019
Arsenic
21.7 µg/L 217%
of the EPA limit, at the 95th percentile of samples — 10 µg/L
worst single sample: 100 µg/L
19/25 SYR4 2014–2019
Lead
19.75 µg/L 132%
of the EPA limit, at the 95th percentile of samples — 15 µg/L
worst single sample: 37 µg/L
16/37 SYR4 2015–2019
Gross Alpha, Excl. Radon And U
15.96 pCi/L 106%
of the EPA limit, at the 95th percentile of samples — 15 pCi/L
worst single sample: 16.8 pCi/L
7/7 SYR4 2014–2018
Chloroform
6.85 µg/L
No EPA limit set
worst single sample: 7.2 µg/L
6/9 SYR4 2016–2019
TTHM
13.6 µg/L 17%
of the EPA limit 80 µg/L
worst single sample: 14 µg/L
5/6 SYR4 2017–2019
Bromodichloromethane
4.595 µg/L
No EPA limit set
worst single sample: 4.7 µg/L
4/9 SYR4 2016–2019
Combined Uranium
1 µg/L 3.3%
of the EPA limit 30 µg/L
 3/7 SYR4 2014–2018
Dibromochloromethane
2.09 µg/L
No EPA limit set
worst single sample: 2.1 µg/L
3/9 SYR4 2016–2019
Barium
39.95 µg/L 2%
of the EPA limit 2000 µg/L
worst single sample: 40 µg/L
2/2 SYR4 2015–2017
Chromium
3.95 µg/L 4%
of the EPA limit 100 µg/L
worst single sample: 4 µg/L
2/2 SYR4 2015–2017
Dichloroacetic Acid
5.155 µg/L
No EPA limit set
worst single sample: 5.2 µg/L
2/2 SYR4 2019
Fluoride
432 µg/L 11%
of the EPA limit 4000 µg/L
worst single sample: 440 µg/L
2/2 SYR4 2015–2017
Total Haloacetic Acids (HAA5)
10.885 µg/L 18%
of the EPA limit 60 µg/L
worst single sample: 11 µg/L
2/2 SYR4 2019
Trichloroacetic Acid
5.35 µg/L
No EPA limit set
worst single sample: 5.4 µg/L
2/2 SYR4 2019
60 contaminants tested, none detected
1,1,1-Trichloroethane1,1,2-Trichloroethane1,1-Dichloroethylene1,2,4-Trichlorobenzene1,2-DIBROMO-3-CHLOROPROPANE1,2-Dichloroethane1,2-Dichloropropane2,4,5-TP2,4-DAntimony, TotalAtrazineBhc-GammaBenzeneBenzo(A)PyreneBeryllium, TotalBromoformChlorobenzeneCadmiumCarbofuranCarbon TetrachlorideChlordaneDichloromethaneDalaponDi(2-ethylhexyl) AdipateDi(2-ethylhexyl) PhthalateDibromoacetic AcidDinosebDiquatEthylene DibromideEndrinEthylbenzeneGlyphosateHexachlorobenzeneHeptachlorHeptachlor EpoxideHexachlorocyclopentadieneLassoMercuryMethoxychlorMonobromoacetic AcidMonochloroacetic AcidNitrateNitriteOxamylPentachlorophenolPicloramSeleniumSimazineStyreneTetrachloroethyleneThallium, TotalTolueneToxapheneTrichloroethyleneVinyl ChlorideXylenes, Totalcis-1,2-DichloroethyleneO-DichlorobenzeneP-Dichlorobenzenetrans-1,2-Dichloroethylene

Utility contact

Contact
LEO BOURBEAU

Frequently asked questions about Rock Rimmon Cooperative

Is Rock Rimmon Cooperative tap water safe to drink?

EPA monitoring detected 16 contaminants in Rock Rimmon Cooperative's water. A detection isn't the same as a violation — most levels are within federal limits. See each level and source above, and the utility's annual Consumer Confidence Report for its official compliance status.

What contaminants were detected in Rock Rimmon Cooperative's water?

EPA monitoring detected Copper, Combined Radium (-226 And -228), Arsenic, Lead, Gross Alpha, Excl. Radon And U, and others. The full list with the level and data source for each is above.

How many people does Rock Rimmon Cooperative serve?

Rock Rimmon Cooperative reports serving 200 people in New Hampshire, per its EPA record.

Has Rock Rimmon Cooperative had any water quality violations?

The EPA has 184 violations on file for Rock Rimmon Cooperative, of which 92 are health-based (a contaminant limit or required treatment was breached) and 0 remain open. The rest are monitoring or reporting failures.

Where does this data come from?

Every figure is official EPA drinking-water monitoring — the Lead & Copper Rule, the UCMR-5 nationwide testing program, and the EPA Six-Year Review — not our own testing. Each number is labelled with its source and period.