← EA monitoring
Environment Agency monitoring point
WALLA BROOK AT BABENY
EA sampling point SW-70724308 · East Dart River · 1,000 samples · 26 determinands · latest 2026-05-27
Ammoniacal Nitrogen as N (MILLIGRAM PER LITRE) over time
Samples — Ammoniacal Nitrogen as N
| Date | Result | Unit | Purpose |
|---|---|---|---|
| 2026-05-27 11:15 | — | MILLIGRAM PER LITRE | MONITORING (UK GOVT POLICY - NOT GQA OR RE) |
| 2026-05-22 11:17 | — | MILLIGRAM PER LITRE | MONITORING (UK GOVT POLICY - NOT GQA OR RE) |
| 2026-05-11 12:01 | — | MILLIGRAM PER LITRE | MONITORING (UK GOVT POLICY - NOT GQA OR RE) |
| 2026-05-01 11:36 | — | MILLIGRAM PER LITRE | MONITORING (UK GOVT POLICY - NOT GQA OR RE) |
| 2026-04-21 12:54 | — | MILLIGRAM PER LITRE | MONITORING (UK GOVT POLICY - NOT GQA OR RE) |
| 2026-04-17 11:22 | — | MILLIGRAM PER LITRE | MONITORING (UK GOVT POLICY - NOT GQA OR RE) |
| 2026-04-01 11:12 | — | MILLIGRAM PER LITRE | MONITORING (UK GOVT POLICY - NOT GQA OR RE) |
| 2026-03-25 12:02 | — | MILLIGRAM PER LITRE | MONITORING (UK GOVT POLICY - NOT GQA OR RE) |
| 2026-03-23 10:11 | — | MILLIGRAM PER LITRE | MONITORING (UK GOVT POLICY - NOT GQA OR RE) |
| 2026-03-16 08:25 | — | MILLIGRAM PER LITRE | MONITORING (UK GOVT POLICY - NOT GQA OR RE) |
| 2026-03-09 11:40 | — | MILLIGRAM PER LITRE | MONITORING (UK GOVT POLICY - NOT GQA OR RE) |
| 2026-03-03 13:01 | — | MILLIGRAM PER LITRE | MONITORING (UK GOVT POLICY - NOT GQA OR RE) |
| 2026-02-23 11:09 | — | MILLIGRAM PER LITRE | MONITORING (UK GOVT POLICY - NOT GQA OR RE) |
| 2026-02-19 10:16 | — | MILLIGRAM PER LITRE | MONITORING (UK GOVT POLICY - NOT GQA OR RE) |
| 2026-02-09 10:56 | — | MILLIGRAM PER LITRE | MONITORING (UK GOVT POLICY - NOT GQA OR RE) |
| 2026-02-02 10:17 | — | MILLIGRAM PER LITRE | MONITORING (UK GOVT POLICY - NOT GQA OR RE) |
| 2026-01-26 13:31 | — | MILLIGRAM PER LITRE | MONITORING (UK GOVT POLICY - NOT GQA OR RE) |
| 2026-01-20 10:53 | — | MILLIGRAM PER LITRE | MONITORING (UK GOVT POLICY - NOT GQA OR RE) |
| 2026-01-15 10:33 | — | MILLIGRAM PER LITRE | MONITORING (UK GOVT POLICY - NOT GQA OR RE) |
| 2025-12-23 10:44 | — | MILLIGRAM PER LITRE | MONITORING (UK GOVT POLICY - NOT GQA OR RE) |
| 2025-12-15 10:53 | — | MILLIGRAM PER LITRE | MONITORING (UK GOVT POLICY - NOT GQA OR RE) |
| 2025-12-08 10:48 | — | MILLIGRAM PER LITRE | MONITORING (UK GOVT POLICY - NOT GQA OR RE) |
| 2025-12-04 10:31 | — | MILLIGRAM PER LITRE | MONITORING (UK GOVT POLICY - NOT GQA OR RE) |
| 2025-12-01 09:23 | — | MILLIGRAM PER LITRE | MONITORING (UK GOVT POLICY - NOT GQA OR RE) |
| 2025-11-24 12:58 | — | MILLIGRAM PER LITRE | MONITORING (UK GOVT POLICY - NOT GQA OR RE) |
| 2025-11-10 10:12 | — | MILLIGRAM PER LITRE | MONITORING (UK GOVT POLICY - NOT GQA OR RE) |
| 2025-11-05 10:20 | — | MILLIGRAM PER LITRE | MONITORING (UK GOVT POLICY - NOT GQA OR RE) |
| 2025-10-27 12:18 | — | MILLIGRAM PER LITRE | MONITORING (UK GOVT POLICY - NOT GQA OR RE) |
| 2025-10-20 13:35 | — | MILLIGRAM PER LITRE | MONITORING (UK GOVT POLICY - NOT GQA OR RE) |
| 2025-10-16 08:21 | — | MILLIGRAM PER LITRE | MONITORING (UK GOVT POLICY - NOT GQA OR RE) |
| 2025-10-10 12:23 | — | MILLIGRAM PER LITRE | MONITORING (UK GOVT POLICY - NOT GQA OR RE) |
| 2025-10-02 11:21 | — | MILLIGRAM PER LITRE | MONITORING (UK GOVT POLICY - NOT GQA OR RE) |
| 2025-09-25 10:22 | — | MILLIGRAM PER LITRE | MONITORING (UK GOVT POLICY - NOT GQA OR RE) |
| 2025-09-16 10:03 | — | MILLIGRAM PER LITRE | MONITORING (UK GOVT POLICY - NOT GQA OR RE) |
| 2025-09-12 11:52 | — | MILLIGRAM PER LITRE | MONITORING (UK GOVT POLICY - NOT GQA OR RE) |
| 2025-09-03 12:43 | — | MILLIGRAM PER LITRE | MONITORING (UK GOVT POLICY - NOT GQA OR RE) |
| 2025-08-29 11:59 | — | MILLIGRAM PER LITRE | MONITORING (UK GOVT POLICY - NOT GQA OR RE) |
| 2025-08-21 12:24 | — | MILLIGRAM PER LITRE | MONITORING (UK GOVT POLICY - NOT GQA OR RE) |
| 2025-08-11 12:54 | — | MILLIGRAM PER LITRE | MONITORING (UK GOVT POLICY - NOT GQA OR RE) |
| 2025-08-04 11:06 | — | MILLIGRAM PER LITRE | MONITORING (UK GOVT POLICY - NOT GQA OR RE) |
| 2025-07-25 09:33 | — | MILLIGRAM PER LITRE | MONITORING (UK GOVT POLICY - NOT GQA OR RE) |
| 2025-07-17 11:56 | — | MILLIGRAM PER LITRE | MONITORING (UK GOVT POLICY - NOT GQA OR RE) |
| 2025-07-11 14:04 | — | MILLIGRAM PER LITRE | MONITORING (UK GOVT POLICY - NOT GQA OR RE) |
| 2025-07-04 10:40 | — | MILLIGRAM PER LITRE | MONITORING (UK GOVT POLICY - NOT GQA OR RE) |
| 2025-06-23 13:32 | — | MILLIGRAM PER LITRE | MONITORING (UK GOVT POLICY - NOT GQA OR RE) |
| 2025-06-18 10:56 | — | MILLIGRAM PER LITRE | MONITORING (UK GOVT POLICY - NOT GQA OR RE) |
| 2025-06-13 11:56 | — | MILLIGRAM PER LITRE | MONITORING (UK GOVT POLICY - NOT GQA OR RE) |
| 2025-06-04 11:16 | — | MILLIGRAM PER LITRE | MONITORING (UK GOVT POLICY - NOT GQA OR RE) |
| 2025-05-30 11:03 | — | MILLIGRAM PER LITRE | MONITORING (UK GOVT POLICY - NOT GQA OR RE) |
| 2025-05-23 09:51 | — | MILLIGRAM PER LITRE | MONITORING (UK GOVT POLICY - NOT GQA OR RE) |
| 2025-05-12 12:17 | — | MILLIGRAM PER LITRE | MONITORING (UK GOVT POLICY - NOT GQA OR RE) |
| 2025-05-06 12:38 | 0.039 | MILLIGRAM PER LITRE | MONITORING (UK GOVT POLICY - NOT GQA OR RE) |
| 2025-05-01 10:17 | — | MILLIGRAM PER LITRE | MONITORING (UK GOVT POLICY - NOT GQA OR RE) |
| 2025-04-23 10:16 | — | MILLIGRAM PER LITRE | MONITORING (UK GOVT POLICY - NOT GQA OR RE) |
| 2025-04-16 10:02 | — | MILLIGRAM PER LITRE | MONITORING (UK GOVT POLICY - NOT GQA OR RE) |
| 2025-04-08 10:28 | — | MILLIGRAM PER LITRE | MONITORING (UK GOVT POLICY - NOT GQA OR RE) |
| 2025-04-01 10:00 | — | MILLIGRAM PER LITRE | MONITORING (UK GOVT POLICY - NOT GQA OR RE) |
| 2025-03-25 10:29 | — | MILLIGRAM PER LITRE | MONITORING (UK GOVT POLICY - NOT GQA OR RE) |
| 2025-02-24 12:53 | — | MILLIGRAM PER LITRE | MONITORING (UK GOVT POLICY - NOT GQA OR RE) |
| 2025-02-17 09:31 | — | MILLIGRAM PER LITRE | MONITORING (UK GOVT POLICY - NOT GQA OR RE) |
| 2025-02-10 11:21 | — | MILLIGRAM PER LITRE | MONITORING (UK GOVT POLICY - NOT GQA OR RE) |
| 2025-02-04 14:11 | — | MILLIGRAM PER LITRE | MONITORING (UK GOVT POLICY - NOT GQA OR RE) |
| 2025-01-27 10:48 | — | MILLIGRAM PER LITRE | MONITORING (UK GOVT POLICY - NOT GQA OR RE) |
| 2025-01-20 09:12 | — | MILLIGRAM PER LITRE | MONITORING (UK GOVT POLICY - NOT GQA OR RE) |
| 2025-01-15 11:01 | — | MILLIGRAM PER LITRE | MONITORING (UK GOVT POLICY - NOT GQA OR RE) |
| 2024-12-16 10:28 | — | MILLIGRAM PER LITRE | MONITORING (UK GOVT POLICY - NOT GQA OR RE) |
| 2024-12-09 11:14 | — | MILLIGRAM PER LITRE | MONITORING (UK GOVT POLICY - NOT GQA OR RE) |
| 2024-12-02 12:20 | — | MILLIGRAM PER LITRE | MONITORING (UK GOVT POLICY - NOT GQA OR RE) |
| 2024-11-20 12:02 | — | MILLIGRAM PER LITRE | MONITORING (UK GOVT POLICY - NOT GQA OR RE) |
| 2024-11-13 11:14 | — | MILLIGRAM PER LITRE | MONITORING (UK GOVT POLICY - NOT GQA OR RE) |
| 2024-11-04 09:10 | — | MILLIGRAM PER LITRE | MONITORING (UK GOVT POLICY - NOT GQA OR RE) |
| 2024-10-28 10:23 | — | MILLIGRAM PER LITRE | MONITORING (UK GOVT POLICY - NOT GQA OR RE) |
| 2024-10-25 14:15 | — | MILLIGRAM PER LITRE | MONITORING (UK GOVT POLICY - NOT GQA OR RE) |
| 2024-10-16 10:06 | — | MILLIGRAM PER LITRE | MONITORING (UK GOVT POLICY - NOT GQA OR RE) |
| 2024-10-11 11:01 | — | MILLIGRAM PER LITRE | MONITORING (UK GOVT POLICY - NOT GQA OR RE) |
| 2024-10-01 14:20 | — | MILLIGRAM PER LITRE | MONITORING (UK GOVT POLICY - NOT GQA OR RE) |
| 2024-09-23 10:29 | — | MILLIGRAM PER LITRE | MONITORING (UK GOVT POLICY - NOT GQA OR RE) |
| 2024-09-20 10:21 | — | MILLIGRAM PER LITRE | MONITORING (UK GOVT POLICY - NOT GQA OR RE) |
| 2024-09-09 10:49 | — | MILLIGRAM PER LITRE | MONITORING (UK GOVT POLICY - NOT GQA OR RE) |
| 2024-09-04 11:30 | — | MILLIGRAM PER LITRE | MONITORING (UK GOVT POLICY - NOT GQA OR RE) |
| 2024-08-21 11:21 | — | MILLIGRAM PER LITRE | MONITORING (UK GOVT POLICY - NOT GQA OR RE) |
| 2024-08-12 10:28 | — | MILLIGRAM PER LITRE | MONITORING (UK GOVT POLICY - NOT GQA OR RE) |
| 2024-08-09 11:30 | — | MILLIGRAM PER LITRE | MONITORING (UK GOVT POLICY - NOT GQA OR RE) |
| 2024-07-29 07:31 | — | MILLIGRAM PER LITRE | MONITORING (UK GOVT POLICY - NOT GQA OR RE) |
| 2024-07-22 10:47 | — | MILLIGRAM PER LITRE | MONITORING (UK GOVT POLICY - NOT GQA OR RE) |
| 2024-07-15 10:24 | — | MILLIGRAM PER LITRE | MONITORING (UK GOVT POLICY - NOT GQA OR RE) |
| 2024-07-11 11:47 | — | MILLIGRAM PER LITRE | MONITORING (UK GOVT POLICY - NOT GQA OR RE) |
| 2024-07-04 13:30 | — | MILLIGRAM PER LITRE | MONITORING (UK GOVT POLICY - NOT GQA OR RE) |
| 2024-06-24 10:51 | — | MILLIGRAM PER LITRE | MONITORING (UK GOVT POLICY - NOT GQA OR RE) |
| 2024-06-21 12:40 | — | MILLIGRAM PER LITRE | MONITORING (UK GOVT POLICY - NOT GQA OR RE) |
| 2024-06-10 14:15 | — | MILLIGRAM PER LITRE | MONITORING (UK GOVT POLICY - NOT GQA OR RE) |
| 2024-06-04 11:06 | — | MILLIGRAM PER LITRE | MONITORING (UK GOVT POLICY - NOT GQA OR RE) |
| 2024-05-29 10:35 | — | MILLIGRAM PER LITRE | MONITORING (UK GOVT POLICY - NOT GQA OR RE) |
| 2024-05-20 09:57 | — | MILLIGRAM PER LITRE | MONITORING (UK GOVT POLICY - NOT GQA OR RE) |
| 2024-05-17 09:23 | — | MILLIGRAM PER LITRE | MONITORING (UK GOVT POLICY - NOT GQA OR RE) |
| 2024-05-08 11:52 | — | MILLIGRAM PER LITRE | MONITORING (UK GOVT POLICY - NOT GQA OR RE) |
| 2024-05-02 15:20 | — | MILLIGRAM PER LITRE | MONITORING (UK GOVT POLICY - NOT GQA OR RE) |
| 2024-04-22 10:27 | — | MILLIGRAM PER LITRE | MONITORING (UK GOVT POLICY - NOT GQA OR RE) |
| 2024-04-17 10:39 | — | MILLIGRAM PER LITRE | MONITORING (NATIONAL AGENCY POLICY) |
| 2024-04-17 10:38 | — | MILLIGRAM PER LITRE | MONITORING (UK GOVT POLICY - NOT GQA OR RE) |
| 2024-04-09 09:32 | — | MILLIGRAM PER LITRE | MONITORING (UK GOVT POLICY - NOT GQA OR RE) |
| 2024-04-02 14:21 | — | MILLIGRAM PER LITRE | MONITORING (UK GOVT POLICY - NOT GQA OR RE) |
| 2024-03-19 11:49 | — | MILLIGRAM PER LITRE | MONITORING (UK GOVT POLICY - NOT GQA OR RE) |
| 2024-02-19 10:58 | — | MILLIGRAM PER LITRE | MONITORING (UK GOVT POLICY - NOT GQA OR RE) |
| 2024-01-15 11:08 | — | MILLIGRAM PER LITRE | MONITORING (UK GOVT POLICY - NOT GQA OR RE) |
| 2023-12-07 11:48 | — | MILLIGRAM PER LITRE | MONITORING (UK GOVT POLICY - NOT GQA OR RE) |
| 2023-11-20 12:03 | — | MILLIGRAM PER LITRE | MONITORING (UK GOVT POLICY - NOT GQA OR RE) |
| 2023-10-31 13:04 | — | MILLIGRAM PER LITRE | MONITORING (UK GOVT POLICY - NOT GQA OR RE) |
| 2023-03-27 11:53 | — | MILLIGRAM PER LITRE | MONITORING (UK GOVT POLICY - NOT GQA OR RE) |
| 2023-03-24 11:11 | — | MILLIGRAM PER LITRE | MONITORING (UK GOVT POLICY - NOT GQA OR RE) |
| 2023-03-17 13:24 | — | MILLIGRAM PER LITRE | MONITORING (UK GOVT POLICY - NOT GQA OR RE) |
| 2023-03-14 10:42 | — | MILLIGRAM PER LITRE | MONITORING (UK GOVT POLICY - NOT GQA OR RE) |
| 2023-03-06 12:39 | 0.14 | MILLIGRAM PER LITRE | MONITORING (UK GOVT POLICY - NOT GQA OR RE) |
| 2023-03-01 10:25 | — | MILLIGRAM PER LITRE | MONITORING (UK GOVT POLICY - NOT GQA OR RE) |
| 2023-02-20 14:10 | — | MILLIGRAM PER LITRE | MONITORING (UK GOVT POLICY - NOT GQA OR RE) |
| 2023-02-13 12:15 | — | MILLIGRAM PER LITRE | MONITORING (UK GOVT POLICY - NOT GQA OR RE) |
| 2023-02-07 13:25 | — | MILLIGRAM PER LITRE | MONITORING (UK GOVT POLICY - NOT GQA OR RE) |
| 2023-02-03 12:36 | — | MILLIGRAM PER LITRE | MONITORING (UK GOVT POLICY - NOT GQA OR RE) |
| 2023-01-24 14:35 | — | MILLIGRAM PER LITRE | MONITORING (UK GOVT POLICY - NOT GQA OR RE) |
| 2022-12-22 11:05 | — | MILLIGRAM PER LITRE | MONITORING (UK GOVT POLICY - NOT GQA OR RE) |
| 2022-12-08 12:43 | — | MILLIGRAM PER LITRE | MONITORING (UK GOVT POLICY - NOT GQA OR RE) |
| 2022-11-28 10:48 | — | MILLIGRAM PER LITRE | MONITORING (UK GOVT POLICY - NOT GQA OR RE) |
| 2022-11-21 11:44 | 0.04 | MILLIGRAM PER LITRE | MONITORING (UK GOVT POLICY - NOT GQA OR RE) |
| 2022-11-14 10:44 | — | MILLIGRAM PER LITRE | MONITORING (UK GOVT POLICY - NOT GQA OR RE) |
| 2022-11-10 10:21 | 0.075 | MILLIGRAM PER LITRE | MONITORING (UK GOVT POLICY - NOT GQA OR RE) |
| 2022-11-02 10:19 | — | MILLIGRAM PER LITRE | MONITORING (UK GOVT POLICY - NOT GQA OR RE) |
| 2022-10-24 12:50 | — | MILLIGRAM PER LITRE | MONITORING (UK GOVT POLICY - NOT GQA OR RE) |
| 2022-10-18 11:12 | — | MILLIGRAM PER LITRE | MONITORING (UK GOVT POLICY - NOT GQA OR RE) |
| 2022-10-10 09:45 | — | MILLIGRAM PER LITRE | MONITORING (UK GOVT POLICY - NOT GQA OR RE) |
| 2022-10-06 10:26 | — | MILLIGRAM PER LITRE | MONITORING (UK GOVT POLICY - NOT GQA OR RE) |
| 2022-09-26 10:18 | — | MILLIGRAM PER LITRE | MONITORING (UK GOVT POLICY - NOT GQA OR RE) |
| 2022-09-20 10:32 | — | MILLIGRAM PER LITRE | MONITORING (UK GOVT POLICY - NOT GQA OR RE) |
| 2022-09-12 10:13 | — | MILLIGRAM PER LITRE | MONITORING (UK GOVT POLICY - NOT GQA OR RE) |
| 2022-09-05 10:12 | — | MILLIGRAM PER LITRE | MONITORING (UK GOVT POLICY - NOT GQA OR RE) |
| 2022-08-31 09:47 | — | MILLIGRAM PER LITRE | MONITORING (UK GOVT POLICY - NOT GQA OR RE) |
| 2022-08-22 09:24 | — | MILLIGRAM PER LITRE | MONITORING (UK GOVT POLICY - NOT GQA OR RE) |
| 2022-08-18 09:53 | — | MILLIGRAM PER LITRE | MONITORING (UK GOVT POLICY - NOT GQA OR RE) |
| 2022-08-08 10:27 | — | MILLIGRAM PER LITRE | MONITORING (UK GOVT POLICY - NOT GQA OR RE) |
| 2022-08-02 09:50 | — | MILLIGRAM PER LITRE | MONITORING (UK GOVT POLICY - NOT GQA OR RE) |
| 2022-07-25 09:49 | — | MILLIGRAM PER LITRE | MONITORING (UK GOVT POLICY - NOT GQA OR RE) |
| 2022-07-18 08:48 | — | MILLIGRAM PER LITRE | MONITORING (UK GOVT POLICY - NOT GQA OR RE) |
| 2022-07-13 11:12 | — | MILLIGRAM PER LITRE | MONITORING (UK GOVT POLICY - NOT GQA OR RE) |
| 2022-07-06 09:00 | — | MILLIGRAM PER LITRE | MONITORING (UK GOVT POLICY - NOT GQA OR RE) |
| 2022-06-27 10:02 | — | MILLIGRAM PER LITRE | MONITORING (UK GOVT POLICY - NOT GQA OR RE) |
| 2022-06-23 13:01 | — | MILLIGRAM PER LITRE | MONITORING (UK GOVT POLICY - NOT GQA OR RE) |
| 2022-06-15 09:54 | — | MILLIGRAM PER LITRE | MONITORING (UK GOVT POLICY - NOT GQA OR RE) |
| 2022-06-06 10:36 | — | MILLIGRAM PER LITRE | MONITORING (UK GOVT POLICY - NOT GQA OR RE) |
| 2022-05-23 10:41 | — | MILLIGRAM PER LITRE | MONITORING (UK GOVT POLICY - NOT GQA OR RE) |
| 2022-05-17 11:47 | — | MILLIGRAM PER LITRE | MONITORING (UK GOVT POLICY - NOT GQA OR RE) |
| 2022-05-11 11:35 | — | MILLIGRAM PER LITRE | MONITORING (UK GOVT POLICY - NOT GQA OR RE) |
| 2022-05-09 08:29 | — | MILLIGRAM PER LITRE | MONITORING (UK GOVT POLICY - NOT GQA OR RE) |
| 2022-04-27 10:59 | — | MILLIGRAM PER LITRE | MONITORING (UK GOVT POLICY - NOT GQA OR RE) |
| 2022-04-22 10:42 | — | MILLIGRAM PER LITRE | MONITORING (UK GOVT POLICY - NOT GQA OR RE) |
| 2022-04-13 09:18 | — | MILLIGRAM PER LITRE | MONITORING (UK GOVT POLICY - NOT GQA OR RE) |
| 2022-04-04 11:07 | — | MILLIGRAM PER LITRE | MONITORING (UK GOVT POLICY - NOT GQA OR RE) |
| 2022-03-28 11:59 | — | MILLIGRAM PER LITRE | MONITORING (UK GOVT POLICY - NOT GQA OR RE) |
| 2022-03-21 11:22 | — | MILLIGRAM PER LITRE | MONITORING (UK GOVT POLICY - NOT GQA OR RE) |
| 2022-03-15 10:14 | — | MILLIGRAM PER LITRE | MONITORING (UK GOVT POLICY - NOT GQA OR RE) |
| 2022-03-07 10:00 | — | MILLIGRAM PER LITRE | MONITORING (UK GOVT POLICY - NOT GQA OR RE) |
| 2022-02-28 08:58 | — | MILLIGRAM PER LITRE | MONITORING (UK GOVT POLICY - NOT GQA OR RE) |
| 2022-02-21 10:45 | — | MILLIGRAM PER LITRE | MONITORING (UK GOVT POLICY - NOT GQA OR RE) |
| 2022-02-15 09:21 | — | MILLIGRAM PER LITRE | MONITORING (UK GOVT POLICY - NOT GQA OR RE) |
| 2022-02-09 12:38 | — | MILLIGRAM PER LITRE | MONITORING (UK GOVT POLICY - NOT GQA OR RE) |
| 2022-02-01 09:41 | — | MILLIGRAM PER LITRE | MONITORING (UK GOVT POLICY - NOT GQA OR RE) |
| 2022-01-31 12:00 | — | MILLIGRAM PER LITRE | MONITORING (UK GOVT POLICY - NOT GQA OR RE) |
Source: Environment Agency Water Quality Archive (per-sample observations), Open Government Licence. Regulator monitoring — complements Friends of the Dart’s citizen sampling.