Industrial station – minimum requirements
Industrial station – minimum requirements (EU framework + EEA Air Quality Index)
Airbox V3 project. Scope: an air quality monitoring station classified as industrial. Traffic and
background stations are covered by sibling documents.
Compiled 3 November 2026. Abbreviations used for sources:
| Short name | Source |
|---|---|
| Dir. | Directive (EU) 2024/2881, final Council text ST 7135/24 (annex numbering as in that text) |
| IPR | Commission Implementing Decision 2011/850/EU (e-reporting rules; still operative until replaced by implementing acts under the new Directive) |
| IPR-G | Eionet IPR Guidance v2.0.1 (data flows D, E1a, E2a) |
| ETC HE | ETC HE Report 2024/17, "EEA's revision of the European air quality index bands" |
| EEA page | EEA Air Quality Index web app methodology notes (https://airindex.eea.europa.eu/AQI/index.html), as compiled in ../EU_AQI_requirements.md |
1. Purpose and scope
This document lists the minimum an industrial station must meet so that:
- its measurements are usable under the EU ambient air quality framework (Dir. 2024/2881 and the
IPR reporting rules), and - it is drawn in full colour (not semi-transparent) on the EEA European Air Quality Index map.
It does not cover traffic or background stations, compliance assessment of a whole zone, or emission
(stack) monitoring of the installation itself, which falls under Directive 2010/75/EU and is a separate
regime. An industrial ambient-air station measures what the public breathes near a source. It does
not measure what leaves the stack.
Hard constraint: a station reaches the EEA index only through the national competent authority's
E2a feed (Romania: ANPM / RNMCA). Meeting every technical item below is necessary but not
sufficient. The authority must also accept, register and report the station.
2. What makes a station an "industrial" station
2.1 Classification criteria
| Aspect | Rule | Source |
|---|---|---|
| Definition | "Located in close proximity to a single industrial source or industrial area." | IPR-G Table 12 (vocabulary http://dd.eionet.europa.eu/vocabulary/aq/stationclassification) |
| Typical source types | Thermal power generation; district heating plants; refineries; waste incineration / treatment plants, dump sites; mining (incl. gravel, oil, natural gas); airports; ports | IPR-G Table 12 |
| Purpose | Assess the contribution of industrial sources, ports or airports to ambient concentrations where people live | Dir. Annex IV B.2(f) |
| Relation to "hotspot" | An air pollution hotspot includes locations "strongly influenced by the emissions from ... a single industrial source or an industrial area with many sources, ports, airports" | Dir. Art. 4(24a) |
| Classification is per pollutant | Dataset D records the classification "in relation to predominant emission sources relevant for the measurement configuration for each pollutant" | IPR Annex II D(ii) item 22; IPR-G (vii) |
| Background (contrast) | Anything that is neither traffic nor industrial; not dominated by a single source type | IPR-G Table 12 |
How the EEA index treats a station whose pollutants carry different classifications (for example O3
classified background, SO2 industrial) is not stated in the local sources. Assume the station is
shown as industrial and must satisfy the industrial minimum set. Confirm with ANPM.
2.2 Area type (independent of the station type)
An industrial station also gets an area classification (IPR-G Table 14, vocabulary
http://dd.eionet.europa.eu/vocabulary/aq/areaclassification). Industrial stations can be any of these:
| Area class | Criterion (IPR-G Table 14) |
|---|---|
| Urban | Continuously built-up area (street fronts built up with buildings of at least two floors) |
| Suburban | Largely built-up, mixed with non-urbanised areas |
| Rural – near city | Within ~10 km of an urban/suburban border |
| Rural – regional | 10–50 km from major sources / source areas |
| Rural – remote | > 50 km from major sources / source areas |
Distances are indicative (IPR-G). A typical Romanian case is suburban or rural-near-city, in the
residential area next to an industrial platform.
2.3 What it must represent
| Requirement | Value | Source |
|---|---|---|
| Location relative to source | At least one sampling point downwind of the main source, within the relevant predominant wind direction, in the nearest residential area | Dir. Annex IV B.2(f) |
| Upwind point | If the background concentration is not known, an additional sampling point upwind of the main source (opposite the predominant wind direction) | Dir. Annex IV B.2(f) |
| BAT monitoring | Points may be sited so that application of BAT (Dir. 2010/75/EU) can be monitored | Dir. Annex IV B.2(f); Annex III A.2 |
| Minimum representativeness area | Air sampled representative of at least 250 m × 250 m for locations measuring the contribution of industrial sites, ports or airports | Dir. Annex IV B.2(b) |
| Representativeness definition | Where levels exceed the assessment threshold, the area each sampling point represents "shall be clearly defined"; where possible also representative of similar locations | Dir. Annex IV B.2(g) |
| Representativeness criteria | Within the zone borders; annual mean as metric; modelling, if used, must be fit for purpose | Dir. Annex IV B.5 |
| Must be ambient air | Not on factory premises / industrial sites where workplace health-and-safety provisions apply and the public has no regular access | Dir. Art. 4(1); Annex IV A.2(b) |
| Exposure focus | Hotspot points located where possible where sensitive / vulnerable groups are exposed (residential areas, schools, hospitals, care homes, offices) | Dir. Annex IV B.2(cb) |
| Number of points near point sources | No fixed number. Calculated from emission densities, likely distribution patterns of ambient pollution and potential population exposure | Dir. Annex III A.2 |
3. Pollutants
3.1 Mandatory minimum for full-colour display on the EEA index
| Pollutant | Required? | Index pollutant | Reference method (Dir. Annex VI A) |
|---|---|---|---|
| NO2 | Yes | Yes | EN 14211:2012 (chemiluminescence) |
| O3 | Yes | Yes | EN 14625:2012 (UV photometry) |
| PM2.5 or PM10 | Yes, at least one | Yes | EN 12341:2023 (gravimetric) |
Source: ETC HE section 2: "For background and industrial stations: Either PM2.5 or PM10 needs to be
measured as well as NO2 and O3." Without all three, the station is drawn semi-transparent (section 8).
Ozone at an industrial site: Dir. Annex IV C(g) requires the O3 sampling point to be "well away from
sources such as furnaces and incineration flues, and more than 10 m from the nearest road". Siting
in the residential area (section 5) normally satisfies this. Note that NO emitted by the source destroys
O3 locally (titration), so O3 at an industrial station will often read lower than at background
stations. The index still requires it.
3.2 Recommended additional pollutants
| Pollutant | Index pollutant? | Reported via E2a (hourly)? | Why at an industrial site | Reference method |
|---|---|---|---|---|
| SO2 | Yes (5th index pollutant) | Yes | Main marker of combustion of sulphur-containing fuels (coal / heavy-oil power and heating plants), refineries, ferrous and non-ferrous metallurgy, ports (ship fuel). Its sub-index can set the station index. Strongly recommended, effectively required in practice for these source types. | EN 14212:2012 (UV fluorescence) |
| PM10 and PM2.5 (both) | Yes | Yes | Mining, quarries, cement, bulk handling, dump sites and ports emit coarse dust that PM2.5 alone misses. Combustion and metallurgy emit fine PM. Measuring both covers either case. | EN 12341:2023 |
| CO | No (shown in EEA up-to-date viewer only) | Yes | Steelworks, coke ovens, incomplete combustion. Part of Annex IX(1)(a) hourly public information. | EN 14626:2012 (NDIR) |
| Benzene | No | No, validated (E1a) only | Refineries, coke ovens, petrochemicals, fuel terminals | EN 14662 parts 1–3 |
| As, Cd, Ni, Pb in PM10 | No | No, validated only | Non-ferrous smelters, steel, coal combustion, waste incineration | Sampling EN 12341:2023; analysis EN 14902:2005 |
| B(a)P / PAH in PM10 | No | No, validated only | Coke ovens, aluminium smelting, steel, solid-fuel combustion | Sampling EN 12341:2023; analysis EN 15549:2008 |
| Total gaseous mercury | No | No | Coal combustion, chlor-alkali, waste incineration | EN 15852:2010 |
Sources: index pollutants from ETC HE section 2. E2a pollutant list from IPR-G (summarised in
../EU_AQI_requirements.md §4.2). Methods from Dir. Annex VI A. The source-type reasoning is general
engineering knowledge and is not taken from the cited legal texts. Check it against the actual
installation's E-PRTR / IED permit emissions (Dir. Annex IV B.1 requires siting to take account of
E-PRTR data).
Heavy metals and B(a)P samplers should where possible be co-located with PM10 (Dir. Annex IV B.2(i)).
4. Measurement requirements
4.1 Time resolution, units, reference conditions
| Item | Requirement | Source |
|---|---|---|
| Averaging for the index | 1-hour means for all index pollutants, including PM (since 4 July 2025) | ETC HE section 2 |
| Gases | 1-hour averaging. Half-hour raw data must be aggregated to hourly means before transmission | IPR-G E(1) |
| PM (automatic monitors) | Raw 30 min / 1 h data aggregated to hourly means. All reported PM must be equivalent to the EN 12341 reference method (correction applied) | IPR-G E(1) |
| Validity of a 1-hour mean | ≥ 75 % of the hour valid (≥ 45 min) | Dir. Annex V Ba |
| Validity of a 24-hour mean | ≥ 75 % of hourly values (≥ 18 h) | Dir. Annex V Ba |
| Units | µg/m³ (CO mg/m³; metals, B(a)P ng/m³) | Dir. Annex I / V |
| Gas reference conditions | Volume standardised to 293 K and 101.3 kPa | Dir. Annex VI C |
| PM reference conditions | Ambient temperature and pressure at time of measurement | Dir. Annex VI C |
| Timestamps | ISO 8601 extended YYYY-MM-DDThh:mm:ss±hh:mm. Timestamp = end of period. No summer time: Romania reports as +02:00 all year |
IPR Annex I A(1); IPR-G |
4.2 Reference methods and equivalence
- Reference methods: EN 14211 (NO2/NOx), EN 14625 (O3), EN 12341 (PM10/PM2.5), EN 14212 (SO2),
EN 14626 (CO). Dir. Annex VI A. - Any other method is allowed only with a demonstration of equivalence with the reference
method. For PM, a method showing a "consistent relationship" may be used, e.g. automatic
monitors meeting EN 16450:2017. Results must be corrected to be equivalent to the reference
method, and the correction is applied retroactively where appropriate. Dir. Annex VI B.1 and B.4. - Type-approval test reports from accredited laboratories in other Member States must be
accepted. Dir. Annex VI D. - Dataset D records whether and how equivalence was demonstrated, with a documentation link.
IPR Annex II D(ii) items 12–13. - Low-cost sensor systems can at most reach indicative quality (CEN/TS 17660-1/-2 Class 1). See
../EU_AQI_requirements.md§6.5. Whether ANPM accepts such data into E2a is their decision.
4.3 Maximum measurement uncertainty (95 % confidence, Dir. Annex V A)
Short-term means:
| Pollutant / metric | Fixed: absolute | Fixed: relative | Indicative: absolute | Indicative: relative |
|---|---|---|---|---|
| NO2 (hourly) | 30 µg/m³ | 15 % | 50 µg/m³ | 25 % |
| NO2 (daily) | 7.5 µg/m³ | 15 % | 12.5 µg/m³ | 25 % |
| O3 (8 h mean) | 18 µg/m³ | 15 % | 30 µg/m³ | 25 % |
| PM2.5 (24 h) | 6.3 µg/m³ | 25 % | 8.8 µg/m³ | 35 % |
| PM10 (24 h) | 11.3 µg/m³ | 25 % | 22.5 µg/m³ | 50 % |
| SO2 (hourly) | 52.5 µg/m³ | 15 % | 87.5 µg/m³ | 25 % |
| SO2 (daily) | 7.5 µg/m³ | 15 % | 12.5 µg/m³ | 25 % |
| CO (8 h) | 1.0 mg/m³ | 10 % | 2.0 mg/m³ | 20 % |
| CO (24 h) | 0.6 mg/m³ | 15 % | 1.0 mg/m³ | 25 % |
Annual means:
| Pollutant | Fixed: absolute | Fixed: relative | Indicative: absolute | Indicative: relative |
|---|---|---|---|---|
| PM2.5 | 3.0 µg/m³ | 30 % (25 % before 2030) | 4.0 µg/m³ | 40 % |
| PM10 | 4.0 µg/m³ | 20 % | 6.0 µg/m³ | 30 % |
| SO2 / NO2 / NOx | 6.0 µg/m³ | 30 % (NO2/NOx 15 % before 2030) | 8.0 µg/m³ | 40 % |
| Benzene | 0.85 µg/m³ | 25 % | 1.2 µg/m³ | 35 % |
| Lead | 0.125 µg/m³ | 25 % | 0.175 µg/m³ | 35 % |
| As / Cd / Ni | 2.4 / 2.0 / 8.0 ng/m³ | 40 % | 3.0 / 2.5 / 10.0 ng/m³ | 50 % |
| B(a)P | 0.5 ng/m³ | 50 % | 0.6 ng/m³ | 60 % |
Rules (Dir. Annex V A):
- Before 2030 the relative values apply. From 2030, the uncertainty must not exceed the absolute
or relative value, whichever is higher. - Uncertainty applies in the region of the limit / target value. It does not apply to
information / alert thresholds. - Calculated per the relevant EN standard. Where no standard exists, per JCGM 100:2008 and ISO 5725-5.
- The Directive sets no hourly uncertainty objective for PM or O3, although the index uses hourly
values for both. There is no separate EEA accuracy requirement for index data in the local sources.
4.4 Minimum data coverage (share of calendar year with valid data, Dir. Annex V B)
| Pollutant | Fixed, annual | Fixed, 1 h / 8 h / 24 h | Indicative, annual | Indicative, 1 h / 8 h / 24 h |
|---|---|---|---|---|
| NO2, SO2, NOx, CO | 85 % | 85 % | 13 % | 50 % |
| O3 (+ related NO, NO2) | 85 % (also separately for Apr–Sep and Oct–Mar) | 85 % | 13 % | 50 % (Apr–Sep only) |
| PM10, PM2.5 | 85 % | 75 % | 13 % | 50 % |
| Benzene | 85 % | – | 13 % | – |
| As, Cd, Ni, Pb | 45 % | – | 13 % | – |
| B(a)P / PAH, total gaseous Hg | 30 % | – | 13 % | – |
- Fixed measurements of SO2, NO2, CO, O3, PM10, PM2.5 and benzene must run continuously over the
full calendar year. Dir. Annex V B. - "Fixed measurements" = at a constant location for at least 1 calendar year. Dir. Art. 4(19).
- Normal maintenance must not take place during pollution peak periods. Dir. Annex V B.
At an industrial site this includes known episodes such as start-ups, upsets and inversion periods. - Data must still be reported to the Commission whether or not coverage objectives are met
(../EU_AQI_requirements.md§4.1, Art. 23).
4.5 Calibration and QA/QC (Dir. Annex V E.1)
| Requirement | Source |
|---|---|
| All measurements traceable per the harmonised standard for testing and calibration laboratories (EN ISO/IEC 17025) | Annex V E.1(a) |
| Network operator has an established QA/QC system with regular maintenance and technical checks, reviewed at least every 5 years by the national reference laboratory | Annex V E.1(b) |
| QA/QC process for data collection and reporting | Annex V E.1(c) |
| National reference laboratory coordinates equivalence demonstration and takes part in JRC intercomparisons at least every 3 years | Annex V E.1(d)–(e) |
Calibration intervals, span/zero check frequency and acceptance criteria are set by the EN method
standards (EN 14211, 14625, 14212, 12341/16450). Those standards are paid documents and are not in
the local sources, so their numeric QA/QC criteria are not reproduced here. Obtain them, or
ANPM/NRL procedures, before finalising the QA plan.
5. Siting requirements
5.1 Macro-scale (where the station goes)
| Requirement | Detail | Source |
|---|---|---|
| Use emission data | Take account of national gridded emissions, E-PRTR data and local inventories | Dir. Annex IV B.1 |
| Downwind | Downwind of the main source, within the relevant predominant wind direction | Annex IV B.2(f) |
| Nearest residential area | The station sits in the nearest residential area, not at the fence line or on site | Annex IV B.2(f), A.2(b) |
| Upwind reference | Additional upwind sampling point if background is not known | Annex IV B.2(f) |
| Representativeness | ≥ 250 m × 250 m; area clearly defined | Annex IV B.2(b), B.2(g) |
| Avoid micro-environments | Not dominated by the immediate vicinity of the inlet | Annex IV B.2(b) |
| Ambient air only | Public access / fixed habitation required. Not on premises under workplace H&S rules | Art. 4(1); Annex IV A.2(a)–(b) |
| Sensitive receptors | Prefer areas with sensitive / vulnerable groups (homes, schools, hospitals) | Annex IV B.2(cb) |
Determine the predominant wind direction from local meteorological records, preferably several
years. The Directive does not prescribe a method or a minimum distance from the source, so neither
is given here.
5.2 Micro-scale (the inlet) – Dir. Annex IV C
| Parameter | Requirement |
|---|---|
| Free airflow arc | ≥ 270° unrestricted (≥ 180° for points at the building line) |
| Clearance from obstacles | ≥ 1.5 m from buildings, balconies, trees and other obstacles (≥ 0.5 m from nearest building for points representing the building line) |
| Inlet height | 0.5 m to 4 m above ground. Higher siting is allowed only for background locations, so it does not apply to an industrial station |
| Direct emissions | Inlet not in the immediate vicinity of sources (no unmixed emissions the public is unlikely to breathe) |
| Exhaust | Sampler exhaust positioned to avoid recirculation to the inlet |
| Ozone inlet | Well away from furnaces / incineration flues and > 10 m from the nearest road, more with heavier traffic |
| Traffic rule (only if traffic is also targeted) | ≥ 25 m from major junction edge, ≤ 10 m from kerbside. Not normally relevant for an industrial station |
| Other factors | Interfering sources, security, access, power and telecoms, visibility, public and operator safety, co-location of pollutants, planning |
"In so far as is practicable" (Annex IV C). Any deviation must be documented with reasons and its
likely impact on measured levels (Annex IV D.3(c)).
5.3 What to document (Dir. Annex IV D)
- Location by spatial coordinates, detailed maps and compass-point photographs (N, E, S, W) of the
surroundings. D.2. - Spatial representativeness of the sampling point. D.2.
- Justification of the location: highest-level / exposure reasoning, compliance with B and C,
deviations. D.3. - Network design supported by modelling or indicative measurements. D.1.
- Review of site selection at least every 5 years. Documentation updated after each review and
made public. D.9–D.10. - Industrial-specific: identity of the source (E-PRTR / IED installation), predominant wind analysis
(wind rose), distance and bearing from source to inlet, and position of the upwind point if any.
6. Station and sampling point metadata (Dataset D)
Fields from IPR Annex II D(ii) ("Fixed measurement information"). The national authority submits them.
Airbox must supply the content.
| # | Field | Industrial-specific note |
|---|---|---|
| 1–4 | Measurement configuration ID, European station ID, network ID, national station code | EoI code format CCXXXXX, e.g. RO + 5 characters; a moved station gets a new code (IPR-G (i)) |
| 5–6 | Station name, municipality | Name = municipality + nearby street/place (IPR-G Table 8) |
| 7–8 | Measurement start/end date, measurement type | Fixed / indicative |
| 9–11 | Method, equipment, detection limit | Per pollutant |
| 12–13 | Demonstration of equivalence + documentation link | Required for any non-reference method |
| 14–15 | Sampling time, sampling interval | 1 h |
| 16–18 | Spatial extent of representative area, evaluation and documentation of representativeness | ≥ 250 m × 250 m (Dir. Annex IV B.2(b)) |
| 19 | Height of air inlet above ground | 0.5–4 m |
| 22 | Classification of station per pollutant | industrial (vocab stationclassification) |
| 23 | Main sources | From vocab emissionsource (e.g. Energy 1.A.1, Industry 1.A.2/2., Fugitive 1.B, Waste 6., Transport for ports/airports). Contributions < 3 % may be labelled not significant (IPR-G (viii)) |
| 24 | Distance from predominant industrial source or source area | Mandatory for industrial stations |
| 25 | Station start/end date | |
| 26 | Longitude, latitude, altitude | ETRS89 recommended; ≥ 4, preferably 5 decimals (~1 m) (IPR-G (ix)) |
| 27 | Station documentation link (maps, photographs) | Annex IV D.2 material |
| 28 | Classification of the area | urban / suburban / rural (+ sub-types) |
| 35–37 | Network name, dates, responsible body | Network type "local" = "designed for the observation of single emission sources" (IPR-G Table 11) |
| 40–44 | DQO: time coverage, data capture, uncertainty estimate, traceability documentation, QA/QC documentation link | Section 4 |
Also recommended (IPR-G (v)): local dispersion situation (vocab dispersionlocal) and regional
dispersion situation (vocab dispersionregional), e.g. "valley in hilly terrain". This matters for
industrial plumes.
Traffic-only fields (20, 21, 29–34) do not apply.
7. Data delivery to the EEA index
| Item | Requirement | Source |
|---|---|---|
| Path | Station → national data provider (ANPM) → Eionet CDR / EEA UTD database, data flow E2a "primary up-to-date assessment data" | IPR Art. 10; IPR-G |
| Frequency | E2a transmitted hourly throughout the year | IPR-G (third package) |
| Pollutants in E2a | NO2, NOx, PM10, PM2.5, SO2, O3, CO (benzene, metals, B(a)P: validated E1a only) | IPR-G |
| Fields per value | Start and end of sampling, time unit, value, validity flag, verification flag, unit, version | IPR Annex II E |
| Validity flag | 1 valid; 2 valid, below DL (value given); 3 valid, below DL, replaced by 0.5×DL; -99 invalid (maintenance/calibration); -1 invalid / missing |
IPR-G E(2) |
| Verification flag | 1 verified; 2 preliminary verified; 3 not verified. Live data normally 3 (or 2) |
IPR-G E(2) |
| Consistency | UTD data are QA-checked against the latest Dataset D and preliminary Dataset C. Update D whenever anything changes | IPR-G |
| Later verified data | E2a values are overwritten by verified E1a data, submitted by 30 September of the following year | IPR-G |
| PM values | Already corrected to EN 12341 equivalence when sent | IPR-G E(1) |
Not verified in the local sources: the maximum latency after the end of an hour that the EEA still
uses for the index, and the exact technical interface ANPM expects from a third-party station. Agree
both with ANPM.
8. How the station will appear on the EEA index
8.1 Display rules
| Rule | Effect for an industrial station | Source |
|---|---|---|
| Sub-indices | One per available index pollutant (NO2, O3, PM2.5, PM10, SO2) from hourly values | ETC HE section 2 |
| Station index | Worst (highest) sub-index | ETC HE section 2 |
| Full colour | Only if NO2 and O3 and (PM2.5 or PM10) are present | ETC HE section 2 |
| Semi-transparent | Minimum set missing. Circle is grey if the partial index is good/fair/moderate, category colour if poor/very poor/extremely poor | ETC HE section 2 |
| Gap-filling | Missing hours filled with downscaled CAMS data: difference method for NO2, PM2.5, PM10; multiplicative for O3. Gap-filled values shown with an asterisk | EEA page |
| SO2 | Not gap-filled. A missing SO2 hour means no SO2 sub-index for that hour. Because SO2 is not in the minimum set, this does not by itself make the station semi-transparent | EEA page |
| Sub-index not determined | If measured values for the same hour are missing on at least 3 of the 4 previous days | EEA page |
| Verification | Index data are up-to-date, not formally verified | EEA page |
Whether a gap-filled mandatory pollutant counts as "present" for the full-colour test is not spelled
out in the local sources. Do not rely on gap-filling. Aim for every mandatory pollutant measured
every hour.
8.2 Index bands (hourly concentrations, µg/m³) – ETC HE Table 5.2, in force since 4 July 2025
| Pollutant (1 h) | Good | Fair | Moderate | Poor | Very poor | Extremely poor |
|---|---|---|---|---|---|---|
| NO2 | 0–10 | 11–25 | 26–60 | 61–100 | 101–150 | > 150 |
| O3 | 0–60 | 61–100 | 101–120 | 121–160 | 161–180 | > 180 |
| PM2.5 | 0–5 | 6–15 | 16–50 | 51–90 | 91–140 | > 140 |
| PM10 | 0–15 | 16–45 | 46–120 | 121–195 | 196–270 | > 270 |
| SO2 | 0–20 | 21–40 | 41–125 | 126–190 | 191–275 | > 275 |
Upper limits of "very poor" for NO2 (150), O3 (180) and SO2 (275) coincide with the Directive's
information thresholds (ETC HE section 2). Health messages: ETC HE Table 6.1 (unchanged from the
previous index).
9. Checklist
Sensors / instruments
- NO2 analyser installed (EN 14211 reference method or demonstrated equivalent)
- O3 analyser installed (EN 14625 reference method or demonstrated equivalent)
- PM2.5 and/or PM10 monitor installed (EN 12341, or EN 16450 automatic monitor with correction)
- SO2 analyser installed if the source burns sulphur-containing fuel or is a refinery, metallurgy or port (EN 14212)
- Source-specific extras decided from the installation's E-PRTR/IED emissions (CO, benzene, metals, B(a)P)
- Equivalence demonstration report available for every non-reference method
- Measurement uncertainty estimated per pollutant and within Dir. Annex V A (fixed or indicative)
Data format
- Hourly means produced for every pollutant, valid only with ≥ 45 min of valid data
- Units µg/m³ (CO mg/m³)
- Gases referenced to 293 K / 101.3 kPa; PM at ambient conditions
- PM values corrected to EN 12341 equivalence before output
- Timestamps ISO 8601 extended, end of period, fixed
+02:00offset (no summer time) - Validity flag (1/2/3/-99/-1) attached to every value
- Verification flag (3 for live data) attached to every value
Siting
- Main industrial source identified and documented (E-PRTR/IED ID)
- Predominant wind direction determined from local meteorological data
- Station located downwind of the source in the nearest residential area
- Station outside factory premises, in publicly accessible ambient air
- Upwind sampling point planned if background concentration is unknown
- Representativeness area of at least 250 m × 250 m defined and documented
- Inlet height between 0.5 m and 4 m
- Free airflow arc of at least 270° (180° at building line)
- Inlet at least 1.5 m from buildings, balconies, trees and obstacles
- Inlet not in the immediate vicinity of any emission source
- Sampler exhaust positioned to avoid recirculation
- O3 inlet away from flues/furnaces and more than 10 m from the nearest road
- Coordinates, detailed maps and N/E/S/W photographs recorded
- Any micro-scale deviation documented with reason and likely impact
Metadata (Dataset D)
- EoI station code assigned by ANPM (
RO+ 5 characters) - Station name follows municipality + location convention
- Coordinates with at least 5 decimals (ETRS89), altitude given
- Station classification
industrialset for each pollutant - Area classification set (urban / suburban / rural sub-type)
- Main emission source(s) set from the
emissionsourcevocabulary - Distance from predominant industrial source or source area recorded
- Inlet height, method, equipment and detection limit recorded per pollutant
- Equivalence documentation link provided
- Representativeness extent and documentation link provided
- Local and regional dispersion situation recorded
- DQO fields (time coverage, data capture, uncertainty, traceability, QA/QC link) filled
Delivery
- Agreement with ANPM/RNMCA to include the station in the national E2a feed
- Hourly data push to ANPM in their required format, with buffering and back-fill
- Maximum acceptable latency per hour confirmed with ANPM
- Dataset D updated by ANPM before data flow starts and after every change
- Arrival verified in the EEA Download Service (UTD/E2a dataset)
- Station visible in full colour on the EEA index map with NO2, O3 and PM sub-indices
QA
- QA/QC system with regular maintenance and technical checks in place
- Calibration traceable to an EN ISO/IEC 17025 accredited laboratory
- Calibration/span/zero criteria taken from the EN method standards or ANPM/NRL procedures
- Design for ≥ 85 % annual data coverage (≥ 75 % for PM short-term; ≥ 50 % if indicative)
- Continuous operation for the full calendar year (fixed measurement, ≥ 1 year at one location)
- Maintenance scheduled outside pollution peak periods and plant episodes
- Site selection and documentation reviewed at least every 5 years