Nerrs Water Quality Site At Great Bay Near Durham

Ranking Statistics

247 score95.4of 100

New Hampshire median

92.0the median score of 385 stations

Scoring higher

107stations in New Hampshire

Sharing its score

3ranks 108 to 110

Points deducted

4.62.4 forecast check, 1.3 arrival, 0.6 reports received, 0.2 accuracy

Counted at the median

Accuracy, instrument checks, forecast checknot measured at this station; New Hampshire median 98.9, 100.0, 76.1

Next above

DLTN3rank 108; ahead on reports received 100% against 98.2%

Next below

WINN3rank 110; behind on median arrival 16 min 38 s against 16 min 53 s

Equal scores are ordered by the share of scheduled reports received, then the reports due in the week (the longer record first), then the median arrival, then the longest silence.

1. Reports receivedweight 3598.234.4 of 35 pointsNew Hampshire median 94.3165 of 168 scheduled reports received in 7 days
2. Arrivalweight 1086.78.7 of 10 pointsNew Hampshire median 100.0half its reports arrived within 17 min
3. Continuityweight 10100.010.0 of 10 pointsNew Hampshire median 100.0longest silence 2 h, on a schedule of one report every 60 min
4. Accuracyweight 20-19.8 of 20 points, at the medianNew Hampshire median 98.9-
5. Instrument checksweight 15-15.0 of 15 points, at the medianNew Hampshire median 100.0-
6. Forecast checkweight 10-7.6 of 10 points, at the medianNew Hampshire median 76.1-

The score is the weighted mean of its six parts, from the last 7 days. How a station is ranked sets out each part.